<?php
/**
* These functions can be replaced via plugins. If plugins do not redefine these
* functions, then these will be used instead.
*
* @package WordPress
*/

if ( ! function_exists( 'wp_set_current_user' ) ) :
/**
* Changes the current user by ID or name.
*
* Set $id to null and specify a name if you do not know a user's ID.
*
* Some WordPress functionality is based on the current user and not based on
* the signed in user. Therefore, it opens the ability to edit and perform
* actions on users who aren't signed in.
*
* @since 2.0.3
*
* @global WP_User $current_user The current user object which holds the user data.
*
* @param int|null $id User ID.
* @param string $name User's username.
* @return WP_User Current user User object.
*/
function wp_set_current_user( $id, $name = '' ) {
global $current_user;

// If `$id` matches the current user, there is nothing to do.
if ( isset( $current_user )
&& ( $current_user instanceof WP_User )
&& ( $id === $current_user->ID )
&& ( null !== $id )
) {
return $current_user;
}

$current_user = new WP_User( $id, $name );

setup_userdata( $current_user->ID );

/**
* Fires after the current user is set.
*
* @since 2.0.1
*/
do_action( 'set_current_user' );

return $current_user;
}
endif;

if ( ! function_exists( 'wp_get_current_user' ) ) :
/**
* Retrieves the current user object.
*
* Will set the current user, if the current user is not set. The current user
* will be set to the logged-in person. If no user is logged-in, then it will
* set the current user to 0, which is invalid and won't have any permissions.
*
* @since 2.0.3
*
* @see _wp_get_current_user()
* @global WP_User $current_user Checks if the current user is set.
*
* @return WP_User Current WP_User instance.
*/
function wp_get_current_user() {
return _wp_get_current_user();
}
endif;

if ( ! function_exists( 'get_userdata' ) ) :
/**
* Retrieves user info by user ID.
*
* @since 0.71
*
* @param int $user_id User ID
* @return WP_User|false WP_User object on success, false on failure.
*/
function get_userdata( $user_id ) {
return get_user_by( 'id', $user_id );
}
endif;

if ( ! function_exists( 'get_user_by' ) ) :
/**
* Retrieves user info by a given field.
*
* @since 2.8.0
* @since 4.4.0 Added 'ID' as an alias of 'id' for the `$field` parameter.
*
* @global WP_User $current_user The current user object which holds the user data.
*
* @param string $field The field to retrieve the user with. id | ID | slug | email | login.
* @param int|string $value A value for $field. A user ID, slug, email address, or login name.
* @return WP_User|false WP_User object on success, false on failure.
*/
function get_user_by( $field, $value ) {
$userdata = WP_User::get_data_by( $field, $value );

if ( ! $userdata ) {
return false;
}

$user = new WP_User();
$user->init( $userdata );

return $user;
}
endif;

if ( ! function_exists( 'cache_users' ) ) :
/**
* Retrieves info for user lists to prevent multiple queries by get_userdata().
*
* @since 3.0.0
*
* @global wpdb $wpdb WordPress database abstraction object.
*
* @param int[] $user_ids User ID numbers list
*/
function cache_users( $user_ids ) {
global $wpdb;

update_meta_cache( 'user', $user_ids );

$clean = _get_non_cached_ids( $user_ids, 'users' );

if ( empty( $clean ) ) {
return;
}

$list = implode( ',', $clean );

$users = $wpdb->get_results( "SELECT * FROM $wpdb->users WHERE ID IN ($list)" );

foreach ( $users as $user ) {
update_user_caches( $user );
}
}
endif;

if ( ! function_exists( 'wp_mail' ) ) :
/**
* Sends an email, similar to PHP's mail function.
*
* A true return value does not automatically mean that the user received the
* email successfully. It just only means that the method used was able to
* process the request without any errors.
*
* The default content type is `text/plain` which does not allow using HTML.
* However, you can set the content type of the email by using the
* {@see 'wp_mail_content_type'} filter.
*
* The default charset is based on the charset used on the blog. The charset can
* be set using the {@see 'wp_mail_charset'} filter.
*
* @since 1.2.1
* @since 5.5.0 is_email() is used for email validation,
* instead of PHPMailer's default validator.
*
* @global PHPMailer\PHPMailer\PHPMailer $phpmailer
*
* @param string|string[] $to Array or comma-separated list of email addresses to send message.
* @param string $subject Email subject.
* @param string $message Message contents.
* @param string|string[] $headers Optional. Additional headers.
* @param string|string[] $attachments Optional. Paths to files to attach.
* @return bool Whether the email was sent successfully.
*/
function wp_mail( $to, $subject, $message, $headers = '', $attachments = array() ) {
// Compact the input, apply the filters, and extract them back out.

/**
* Filters the wp_mail() arguments.
*
* @since 2.2.0
*
* @param array $args {
* Array of the `wp_mail()` arguments.
*
* @type string|string[] $to Array or comma-separated list of email addresses to send message.
* @type string $subject Email subject.
* @type string $message Message contents.
* @type string|string[] $headers Additional headers.
* @type string|string[] $attachments Paths to files to attach.
* }
*/
$atts = apply_filters( 'wp_mail', compact( 'to', 'subject', 'message', 'headers', 'attachments' ) );

/**
* Filters whether to preempt sending an email.
*
* Returning a non-null value will short-circuit {@see wp_mail()}, returning
* that value instead. A boolean return value should be used to indicate whether
* the email was successfully sent.
*
* @since 5.7.0
*
* @param null|bool $return Short-circuit return value.
* @param array $atts {
* Array of the `wp_mail()` arguments.
*
* @type string|string[] $to Array or comma-separated list of email addresses to send message.
* @type string $subject Email subject.
* @type string $message Message contents.
* @type string|string[] $headers Additional headers.
* @type string|string[] $attachments Paths to files to attach.
* }
*/
$pre_wp_mail = apply_filters( 'pre_wp_mail', null, $atts );

if ( null !== $pre_wp_mail ) {
return $pre_wp_mail;
}

if ( isset( $atts['to'] ) ) {
$to = $atts['to'];
}

if ( ! is_array( $to ) ) {
$to = explode( ',', $to );
}

if ( isset( $atts['subject'] ) ) {
$subject = $atts['subject'];
}

if ( isset( $atts['message'] ) ) {
$message = $atts['message'];
}

if ( isset( $atts['headers'] ) ) {
$headers = $atts['headers'];
}

if ( isset( $atts['attachments'] ) ) {
$attachments = $atts['attachments'];
}

if ( ! is_array( $attachments ) ) {
$attachments = explode( "\n", str_replace( "\r\n", "\n", $attachments ) );
}
global $phpmailer;

// (Re)create it, if it's gone missing.
if ( ! ( $phpmailer instanceof PHPMailer\PHPMailer\PHPMailer ) ) {
require_once ABSPATH . WPINC . '/PHPMailer/PHPMailer.php';
require_once ABSPATH . WPINC . '/PHPMailer/SMTP.php';
require_once ABSPATH . WPINC . '/PHPMailer/Exception.php';
$phpmailer = new PHPMailer\PHPMailer\PHPMailer( true );

$phpmailer::$validator = static function ( $email ) {
return (bool) is_email( $email );
};
}

// Headers.
$cc = array();
$bcc = array();
$reply_to = array();

if ( empty( $headers ) ) {
$headers = array();
} else {
if ( ! is_array( $headers ) ) {
/*
* Explode the headers out, so this function can take
* both string headers and an array of headers.
*/
$tempheaders = explode( "\n", str_replace( "\r\n", "\n", $headers ) );
} else {
$tempheaders = $headers;
}
$headers = array();

// If it's actually got contents.
if ( ! empty( $tempheaders ) ) {
// Iterate through the raw headers.
foreach ( (array) $tempheaders as $header ) {
if ( ! str_contains( $header, ':' ) ) {
if ( false !== stripos( $header, 'boundary=' ) ) {
$parts = preg_split( '/boundary=/i', trim( $header ) );
$boundary = trim( str_replace( array( "'", '"' ), '', $parts[1] ) );
}
continue;
}
// Explode them out.
list( $name, $content ) = explode( ':', trim( $header ), 2 );

// Cleanup crew.
$name = trim( $name );
$content = trim( $content );

switch ( strtolower( $name ) ) {
// Mainly for legacy -- process a "From:" header if it's there.
case 'from':
$bracket_pos = strpos( $content, '<' );
if ( false !== $bracket_pos ) {
// Text before the bracketed email is the "From" name.
if ( $bracket_pos > 0 ) {
$from_name = substr( $content, 0, $bracket_pos );
$from_name = str_replace( '"', '', $from_name );
$from_name = trim( $from_name );
}

$from_email = substr( $content, $bracket_pos + 1 );
$from_email = str_replace( '>', '', $from_email );
$from_email = trim( $from_email );

// Avoid setting an empty $from_email.
} elseif ( '' !== trim( $content ) ) {
$from_email = trim( $content );
}
break;
case 'content-type':
if ( str_contains( $content, ';' ) ) {
list( $type, $charset_content ) = explode( ';', $content );
$content_type = trim( $type );
if ( false !== stripos( $charset_content, 'charset=' ) ) {
$charset = trim( str_replace( array( 'charset=', '"' ), '', $charset_content ) );
} elseif ( false !== stripos( $charset_content, 'boundary=' ) ) {
$boundary = trim( str_replace( array( 'BOUNDARY=', 'boundary=', '"' ), '', $charset_content ) );
$charset = '';
}

// Avoid setting an empty $content_type.
} elseif ( '' !== trim( $content ) ) {
$content_type = trim( $content );
}
break;
case 'cc':
$cc = array_merge( (array) $cc, explode( ',', $content ) );
break;
case 'bcc':
$bcc = array_merge( (array) $bcc, explode( ',', $content ) );
break;
case 'reply-to':
$reply_to = array_merge( (array) $reply_to, explode( ',', $content ) );
break;
default:
// Add it to our grand headers array.
$headers[ trim( $name ) ] = trim( $content );
break;
}
}
}
}

// Empty out the values that may be set.
$phpmailer->clearAllRecipients();
$phpmailer->clearAttachments();
$phpmailer->clearCustomHeaders();
$phpmailer->clearReplyTos();
$phpmailer->Body = '';
$phpmailer->AltBody = '';

// Set "From" name and email.

// If we don't have a name from the input headers.
if ( ! isset( $from_name ) ) {
$from_name = 'WordPress';
}

/*
* If we don't have an email from the input headers, default to wordpress@$sitename
* Some hosts will block outgoing mail from this address if it doesn't exist,
* but there's no easy alternative. Defaulting to admin_email might appear to be
* another option, but some hosts may refuse to relay mail from an unknown domain.
* See https://core.trac.wordpress.org/ticket/5007.
*/
if ( ! isset( $from_email ) ) {
// Get the site domain and get rid of www.
$sitename = wp_parse_url( network_home_url(), PHP_URL_HOST );
$from_email = 'wordpress@';

if ( null !== $sitename ) {
if ( str_starts_with( $sitename, 'www.' ) ) {
$sitename = substr( $sitename, 4 );
}

$from_email .= $sitename;
}
}

/**
* Filters the email address to send from.
*
* @since 2.2.0
*
* @param string $from_email Email address to send from.
*/
$from_email = apply_filters( 'wp_mail_from', $from_email );

/**
* Filters the name to associate with the "from" email address.
*
* @since 2.3.0
*
* @param string $from_name Name associated with the "from" email address.
*/
$from_name = apply_filters( 'wp_mail_from_name', $from_name );

try {
$phpmailer->setFrom( $from_email, $from_name, false );
} catch ( PHPMailer\PHPMailer\Exception $e ) {
$mail_error_data = compact( 'to', 'subject', 'message', 'headers', 'attachments' );
$mail_error_data['phpmailer_exception_code'] = $e->getCode();

/** This filter is documented in wp-includes/pluggable.php */
do_action( 'wp_mail_failed', new WP_Error( 'wp_mail_failed', $e->getMessage(), $mail_error_data ) );

return false;
}

// Set mail's subject and body.
$phpmailer->Subject = $subject;
$phpmailer->Body = $message;

// Set destination addresses, using appropriate methods for handling addresses.
$address_headers = compact( 'to', 'cc', 'bcc', 'reply_to' );

foreach ( $address_headers as $address_header => $addresses ) {
if ( empty( $addresses ) ) {
continue;
}

foreach ( (array) $addresses as $address ) {
try {
// Break $recipient into name and address parts if in the format "Foo <bar@baz.com>".
$recipient_name = '';

if ( preg_match( '/(.*)<(.+)>/', $address, $matches ) ) {
if ( count( $matches ) === 3 ) {
$recipient_name = $matches[1];
$address = $matches[2];
}
}

switch ( $address_header ) {
case 'to':
$phpmailer->addAddress( $address, $recipient_name );
break;
case 'cc':
$phpmailer->addCc( $address, $recipient_name );
break;
case 'bcc':
$phpmailer->addBcc( $address, $recipient_name );
break;
case 'reply_to':
$phpmailer->addReplyTo( $address, $recipient_name );
break;
}
} catch ( PHPMailer\PHPMailer\Exception $e ) {
continue;
}
}
}

// Set to use PHP's mail().
$phpmailer->isMail();

// Set Content-Type and charset.

// If we don't have a Content-Type from the input headers.
if ( ! isset( $content_type ) ) {
$content_type = 'text/plain';
}

/**
* Filters the wp_mail() content type.
*
* @since 2.3.0
*
* @param string $content_type Default wp_mail() content type.
*/
$content_type = apply_filters( 'wp_mail_content_type', $content_type );

$phpmailer->ContentType = $content_type;

// Set whether it's plaintext, depending on $content_type.
if ( 'text/html' === $content_type ) {
$phpmailer->isHTML( true );
}

// If we don't have a charset from the input headers.
if ( ! isset( $charset ) ) {
$charset = get_bloginfo( 'charset' );
}

/**
* Filters the default wp_mail() charset.
*
* @since 2.3.0
*
* @param string $charset Default email charset.
*/
$phpmailer->CharSet = apply_filters( 'wp_mail_charset', $charset );

// Set custom headers.
if ( ! empty( $headers ) ) {
foreach ( (array) $headers as $name => $content ) {
// Only add custom headers not added automatically by PHPMailer.
if ( ! in_array( $name, array( 'MIME-Version', 'X-Mailer' ), true ) ) {
try {
$phpmailer->addCustomHeader( sprintf( '%1$s: %2$s', $name, $content ) );
} catch ( PHPMailer\PHPMailer\Exception $e ) {
continue;
}
}
}

if ( false !== stripos( $content_type, 'multipart' ) && ! empty( $boundary ) ) {
$phpmailer->addCustomHeader( sprintf( 'Content-Type: %s; boundary="%s"', $content_type, $boundary ) );
}
}

if ( ! empty( $attachments ) ) {
foreach ( $attachments as $filename => $attachment ) {
$filename = is_string( $filename ) ? $filename : '';

try {
$phpmailer->addAttachment( $attachment, $filename );
} catch ( PHPMailer\PHPMailer\Exception $e ) {
continue;
}
}
}

/**
* Fires after PHPMailer is initialized.
*
* @since 2.2.0
*
* @param PHPMailer $phpmailer The PHPMailer instance (passed by reference).
*/
do_action_ref_array( 'phpmailer_init', array( &$phpmailer ) );

$mail_data = compact( 'to', 'subject', 'message', 'headers', 'attachments' );

// Send!
try {
$send = $phpmailer->send();

/**
* Fires after PHPMailer has successfully sent an email.
*
* The firing of this action does not necessarily mean that the recipient(s) received the
* email successfully. It only means that the `send` method above was able to
* process the request without any errors.
*
* @since 5.9.0
*
* @param array $mail_data {
* An array containing the email recipient(s), subject, message, headers, and attachments.
*
* @type string[] $to Email addresses to send message.
* @type string $subject Email subject.
* @type string $message Message contents.
* @type string[] $headers Additional headers.
* @type string[] $attachments Paths to files to attach.
* }
*/
do_action( 'wp_mail_succeeded', $mail_data );

return $send;
} catch ( PHPMailer\PHPMailer\Exception $e ) {
$mail_data['phpmailer_exception_code'] = $e->getCode();

/**
* Fires after a PHPMailer\PHPMailer\Exception is caught.
*
* @since 4.4.0
*
* @param WP_Error $error A WP_Error object with the PHPMailer\PHPMailer\Exception message, and an array
* containing the mail recipient, subject, message, headers, and attachments.
*/
do_action( 'wp_mail_failed', new WP_Error( 'wp_mail_failed', $e->getMessage(), $mail_data ) );

return false;
}
}
endif;

if ( ! function_exists( 'wp_authenticate' ) ) :
/**
* Authenticates a user, confirming the login credentials are valid.
*
* @since 2.5.0
* @since 4.5.0 `$username` now accepts an email address.
*
* @param string $username User's username or email address.
* @param string $password User's password.
* @return WP_User|WP_Error WP_User object if the credentials are valid,
* otherwise WP_Error.
*/
function wp_authenticate( $username, $password ) {
$username = sanitize_user( $username );
$password = trim( $password );

/**
* Filters whether a set of user login credentials are valid.
*
* A WP_User object is returned if the credentials authenticate a user.
* WP_Error or null otherwise.
*
* @since 2.8.0
* @since 4.5.0 `$username` now accepts an email address.
*
* @param null|WP_User|WP_Error $user WP_User if the user is authenticated.
* WP_Error or null otherwise.
* @param string $username Username or email address.
* @param string $password User password.
*/
$user = apply_filters( 'authenticate', null, $username, $password );

if ( null === $user || false === $user ) {
/*
* TODO: What should the error message be? (Or would these even happen?)
* Only needed if all authentication handlers fail to return anything.
*/
$user = new WP_Error( 'authentication_failed', __( '<strong>Error:</strong> Invalid username, email address or incorrect password.' ) );
}

$ignore_codes = array( 'empty_username', 'empty_password' );

if ( is_wp_error( $user ) && ! in_array( $user->get_error_code(), $ignore_codes, true ) ) {
$error = $user;

/**
* Fires after a user login has failed.
*
* @since 2.5.0
* @since 4.5.0 The value of `$username` can now be an email address.
* @since 5.4.0 The `$error` parameter was added.
*
* @param string $username Username or email address.
* @param WP_Error $error A WP_Error object with the authentication failure details.
*/
do_action( 'wp_login_failed', $username, $error );
}

return $user;
}
endif;

if ( ! function_exists( 'wp_logout' ) ) :
/**
* Logs the current user out.
*
* @since 2.5.0
*/
function wp_logout() {
$user_id = get_current_user_id();

wp_destroy_current_session();
wp_clear_auth_cookie();
wp_set_current_user( 0 );

/**
* Fires after a user is logged out.
*
* @since 1.5.0
* @since 5.5.0 Added the `$user_id` parameter.
*
* @param int $user_id ID of the user that was logged out.
*/
do_action( 'wp_logout', $user_id );
}
endif;

if ( ! function_exists( 'wp_validate_auth_cookie' ) ) :
/**
* Validates authentication cookie.
*
* The checks include making sure that the authentication cookie is set and
* pulling in the contents (if $cookie is not used).
*
* Makes sure the cookie is not expired. Verifies the hash in cookie is what is
* should be and compares the two.
*
* @since 2.5.0
*
* @global int $login_grace_period
*
* @param string $cookie Optional. If used, will validate contents instead of cookie's.
* @param string $scheme Optional. The cookie scheme to use: 'auth', 'secure_auth', or 'logged_in'.
* @return int|false User ID if valid cookie, false if invalid.
*/
function wp_validate_auth_cookie( $cookie = '', $scheme = '' ) {
$cookie_elements = wp_parse_auth_cookie( $cookie, $scheme );
if ( ! $cookie_elements ) {
/**
* Fires if an authentication cookie is malformed.
*
* @since 2.7.0
*
* @param string $cookie Malformed auth cookie.
* @param string $scheme Authentication scheme. Values include 'auth', 'secure_auth',
* or 'logged_in'.
*/
do_action( 'auth_cookie_malformed', $cookie, $scheme );
return false;
}

$scheme = $cookie_elements['scheme'];
$username = $cookie_elements['username'];
$hmac = $cookie_elements['hmac'];
$token = $cookie_elements['token'];
$expired = $cookie_elements['expiration'];
$expiration = $cookie_elements['expiration'];

// Allow a grace period for POST and Ajax requests.
if ( wp_doing_ajax() || 'POST' === $_SERVER['REQUEST_METHOD'] ) {
$expired += HOUR_IN_SECONDS;
}

// Quick check to see if an honest cookie has expired.
if ( $expired < time() ) {
/**
* Fires once an authentication cookie has expired.
*
* @since 2.7.0
*
* @param string[] $cookie_elements {
* Authentication cookie components. None of the components should be assumed
* to be valid as they come directly from a client-provided cookie value.
*
* @type string $username User's username.
* @type string $expiration The time the cookie expires as a UNIX timestamp.
* @type string $token User's session token used.
* @type string $hmac The security hash for the cookie.
* @type string $scheme The cookie scheme to use.
* }
*/
do_action( 'auth_cookie_expired', $cookie_elements );
return false;
}

$user = get_user_by( 'login', $username );
if ( ! $user ) {
/**
* Fires if a bad username is entered in the user authentication process.
*
* @since 2.7.0
*
* @param string[] $cookie_elements {
* Authentication cookie components. None of the components should be assumed
* to be valid as they come directly from a client-provided cookie value.
*
* @type string $username User's username.
* @type string $expiration The time the cookie expires as a UNIX timestamp.
* @type string $token User's session token used.
* @type string $hmac The security hash for the cookie.
* @type string $scheme The cookie scheme to use.
* }
*/
do_action( 'auth_cookie_bad_username', $cookie_elements );
return false;
}

$pass_frag = substr( $user->user_pass, 8, 4 );

$key = wp_hash( $username . '|' . $pass_frag . '|' . $expiration . '|' . $token, $scheme );

// If ext/hash is not present, compat.php's hash_hmac() does not support sha256.
$algo = function_exists( 'hash' ) ? 'sha256' : 'sha1';
$hash = hash_hmac( $algo, $username . '|' . $expiration . '|' . $token, $key );

if ( ! hash_equals( $hash, $hmac ) ) {
/**
* Fires if a bad authentication cookie hash is encountered.
*
* @since 2.7.0
*
* @param string[] $cookie_elements {
* Authentication cookie components. None of the components should be assumed
* to be valid as they come directly from a client-provided cookie value.
*
* @type string $username User's username.
* @type string $expiration The time the cookie expires as a UNIX timestamp.
* @type string $token User's session token used.
* @type string $hmac The security hash for the cookie.
* @type string $scheme The cookie scheme to use.
* }
*/
do_action( 'auth_cookie_bad_hash', $cookie_elements );
return false;
}

$manager = WP_Session_Tokens::get_instance( $user->ID );
if ( ! $manager->verify( $token ) ) {
/**
* Fires if a bad session token is encountered.
*
* @since 4.0.0
*
* @param string[] $cookie_elements {
* Authentication cookie components. None of the components should be assumed
* to be valid as they come directly from a client-provided cookie value.
*
* @type string $username User's username.
* @type string $expiration The time the cookie expires as a UNIX timestamp.
* @type string $token User's session token used.
* @type string $hmac The security hash for the cookie.
* @type string $scheme The cookie scheme to use.
* }
*/
do_action( 'auth_cookie_bad_session_token', $cookie_elements );
return false;
}

// Ajax/POST grace period set above.
if ( $expiration < time() ) {
$GLOBALS['login_grace_period'] = 1;
}

/**
* Fires once an authentication cookie has been validated.
*
* @since 2.7.0
*
* @param string[] $cookie_elements {
* Authentication cookie components.
*
* @type string $username User's username.
* @type string $expiration The time the cookie expires as a UNIX timestamp.
* @type string $token User's session token used.
* @type string $hmac The security hash for the cookie.
* @type string $scheme The cookie scheme to use.
* }
* @param WP_User $user User object.
*/
do_action( 'auth_cookie_valid', $cookie_elements, $user );

return $user->ID;
}
endif;

if ( ! function_exists( 'wp_generate_auth_cookie' ) ) :
/**
* Generates authentication cookie contents.
*
* @since 2.5.0
* @since 4.0.0 The `$token` parameter was added.
*
* @param int $user_id User ID.
* @param int $expiration The time the cookie expires as a UNIX timestamp.
* @param string $scheme Optional. The cookie scheme to use: 'auth', 'secure_auth', or 'logged_in'.
* Default 'auth'.
* @param string $token User's session token to use for this cookie.
* @return string Authentication cookie contents. Empty string if user does not exist.
*/
function wp_generate_auth_cookie( $user_id, $expiration, $scheme = 'auth', $token = '' ) {
$user = get_userdata( $user_id );
if ( ! $user ) {
return '';
}

if ( ! $token ) {
$manager = WP_Session_Tokens::get_instance( $user_id );
$token = $manager->create( $expiration );
}

$pass_frag = substr( $user->user_pass, 8, 4 );

$key = wp_hash( $user->user_login . '|' . $pass_frag . '|' . $expiration . '|' . $token, $scheme );

// If ext/hash is not present, compat.php's hash_hmac() does not support sha256.
$algo = function_exists( 'hash' ) ? 'sha256' : 'sha1';
$hash = hash_hmac( $algo, $user->user_login . '|' . $expiration . '|' . $token, $key );

$cookie = $user->user_login . '|' . $expiration . '|' . $token . '|' . $hash;

/**
* Filters the authentication cookie.
*
* @since 2.5.0
* @since 4.0.0 The `$token` parameter was added.
*
* @param string $cookie Authentication cookie.
* @param int $user_id User ID.
* @param int $expiration The time the cookie expires as a UNIX timestamp.
* @param string $scheme Cookie scheme used. Accepts 'auth', 'secure_auth', or 'logged_in'.
* @param string $token User's session token used.
*/
return apply_filters( 'auth_cookie', $cookie, $user_id, $expiration, $scheme, $token );
}
endif;

if ( ! function_exists( 'wp_parse_auth_cookie' ) ) :
/**
* Parses a cookie into its components.
*
* @since 2.7.0
* @since 4.0.0 The `$token` element was added to the return value.
*
* @param string $cookie Authentication cookie.
* @param string $scheme Optional. The cookie scheme to use: 'auth', 'secure_auth', or 'logged_in'.
* @return string[]|false {
* Authentication cookie components. None of the components should be assumed
* to be valid as they come directly from a client-provided cookie value. If
* the cookie value is malformed, false is returned.
*
* @type string $username User's username.
* @type string $expiration The time the cookie expires as a UNIX timestamp.
* @type string $token User's session token used.
* @type string $hmac The security hash for the cookie.
* @type string $scheme The cookie scheme to use.
* }
*/
function wp_parse_auth_cookie( $cookie = '', $scheme = '' ) {
if ( empty( $cookie ) ) {
switch ( $scheme ) {
case 'auth':
$cookie_name = AUTH_COOKIE;
break;
case 'secure_auth':
$cookie_name = SECURE_AUTH_COOKIE;
break;
case 'logged_in':
$cookie_name = LOGGED_IN_COOKIE;
break;
default:
if ( is_ssl() ) {
$cookie_name = SECURE_AUTH_COOKIE;
$scheme = 'secure_auth';
} else {
$cookie_name = AUTH_COOKIE;
$scheme = 'auth';
}
}

if ( empty( $_COOKIE[ $cookie_name ] ) ) {
return false;
}
$cookie = $_COOKIE[ $cookie_name ];
}

$cookie_elements = explode( '|', $cookie );
if ( count( $cookie_elements ) !== 4 ) {
return false;
}

list( $username, $expiration, $token, $hmac ) = $cookie_elements;

return compact( 'username', 'expiration', 'token', 'hmac', 'scheme' );
}
endif;

if ( ! function_exists( 'wp_set_auth_cookie' ) ) :
/**
* Sets the authentication cookies based on user ID.
*
* The $remember parameter increases the time that the cookie will be kept. The
* default the cookie is kept without remembering is two days. When $remember is
* set, the cookies will be kept for 14 days or two weeks.
*
* @since 2.5.0
* @since 4.3.0 Added the `$token` parameter.
*
* @param int $user_id User ID.
* @param bool $remember Whether to remember the user.
* @param bool|string $secure Whether the auth cookie should only be sent over HTTPS. Default is an empty
* string which means the value of `is_ssl()` will be used.
* @param string $token Optional. User's session token to use for this cookie.
*/
function wp_set_auth_cookie( $user_id, $remember = false, $secure = '', $token = '' ) {
if ( $remember ) {
/**
* Filters the duration of the authentication cookie expiration period.
*
* @since 2.8.0
*
* @param int $length Duration of the expiration period in seconds.
* @param int $user_id User ID.
* @param bool $remember Whether to remember the user login. Default false.
*/
$expiration = time() + apply_filters( 'auth_cookie_expiration', 14 * DAY_IN_SECONDS, $user_id, $remember );

/*
* Ensure the browser will continue to send the cookie after the expiration time is reached.
* Needed for the login grace period in wp_validate_auth_cookie().
*/
$expire = $expiration + ( 12 * HOUR_IN_SECONDS );
} else {
/** This filter is documented in wp-includes/pluggable.php */
$expiration = time() + apply_filters( 'auth_cookie_expiration', 2 * DAY_IN_SECONDS, $user_id, $remember );
$expire = 0;
}

if ( '' === $secure ) {
$secure = is_ssl();
}

// Front-end cookie is secure when the auth cookie is secure and the site's home URL uses HTTPS.
$secure_logged_in_cookie = $secure && 'https' === parse_url( get_option( 'home' ), PHP_URL_SCHEME );

/**
* Filters whether the auth cookie should only be sent over HTTPS.
*
* @since 3.1.0
*
* @param bool $secure Whether the cookie should only be sent over HTTPS.
* @param int $user_id User ID.
*/
$secure = apply_filters( 'secure_auth_cookie', $secure, $user_id );

/**
* Filters whether the logged in cookie should only be sent over HTTPS.
*
* @since 3.1.0
*
* @param bool $secure_logged_in_cookie Whether the logged in cookie should only be sent over HTTPS.
* @param int $user_id User ID.
* @param bool $secure Whether the auth cookie should only be sent over HTTPS.
*/
$secure_logged_in_cookie = apply_filters( 'secure_logged_in_cookie', $secure_logged_in_cookie, $user_id, $secure );

if ( $secure ) {
$auth_cookie_name = SECURE_AUTH_COOKIE;
$scheme = 'secure_auth';
} else {
$auth_cookie_name = AUTH_COOKIE;
$scheme = 'auth';
}

if ( '' === $token ) {
$manager = WP_Session_Tokens::get_instance( $user_id );
$token = $manager->create( $expiration );
}

$auth_cookie = wp_generate_auth_cookie( $user_id, $expiration, $scheme, $token );
$logged_in_cookie = wp_generate_auth_cookie( $user_id, $expiration, 'logged_in', $token );

/**
* Fires immediately before the authentication cookie is set.
*
* @since 2.5.0
* @since 4.9.0 The `$token` parameter was added.
*
* @param string $auth_cookie Authentication cookie value.
* @param int $expire The time the login grace period expires as a UNIX timestamp.
* Default is 12 hours past the cookie's expiration time.
* @param int $expiration The time when the authentication cookie expires as a UNIX timestamp.
* Default is 14 days from now.
* @param int $user_id User ID.
* @param string $scheme Authentication scheme. Values include 'auth' or 'secure_auth'.
* @param string $token User's session token to use for this cookie.
*/
do_action( 'set_auth_cookie', $auth_cookie, $expire, $expiration, $user_id, $scheme, $token );

/**
* Fires immediately before the logged-in authentication cookie is set.
*
* @since 2.6.0
* @since 4.9.0 The `$token` parameter was added.
*
* @param string $logged_in_cookie The logged-in cookie value.
* @param int $expire The time the login grace period expires as a UNIX timestamp.
* Default is 12 hours past the cookie's expiration time.
* @param int $expiration The time when the logged-in authentication cookie expires as a UNIX timestamp.
* Default is 14 days from now.
* @param int $user_id User ID.
* @param string $scheme Authentication scheme. Default 'logged_in'.
* @param string $token User's session token to use for this cookie.
*/
do_action( 'set_logged_in_cookie', $logged_in_cookie, $expire, $expiration, $user_id, 'logged_in', $token );

/**
* Allows preventing auth cookies from actually being sent to the client.
*
* @since 4.7.4
* @since 6.2.0 The `$expire`, `$expiration`, `$user_id`, `$scheme`, and `$token` parameters were added.
*
* @param bool $send Whether to send auth cookies to the client. Default true.
* @param int $expire The time the login grace period expires as a UNIX timestamp.
* Default is 12 hours past the cookie's expiration time. Zero when clearing cookies.
* @param int $expiration The time when the logged-in authentication cookie expires as a UNIX timestamp.
* Default is 14 days from now. Zero when clearing cookies.
* @param int $user_id User ID. Zero when clearing cookies.
* @param string $scheme Authentication scheme. Values include 'auth' or 'secure_auth'.
* Empty string when clearing cookies.
* @param string $token User's session token to use for this cookie. Empty string when clearing cookies.
*/
if ( ! apply_filters( 'send_auth_cookies', true, $expire, $expiration, $user_id, $scheme, $token ) ) {
return;
}

setcookie( $auth_cookie_name, $auth_cookie, $expire, PLUGINS_COOKIE_PATH, COOKIE_DOMAIN, $secure, true );
setcookie( $auth_cookie_name, $auth_cookie, $expire, ADMIN_COOKIE_PATH, COOKIE_DOMAIN, $secure, true );
setcookie( LOGGED_IN_COOKIE, $logged_in_cookie, $expire, COOKIEPATH, COOKIE_DOMAIN, $secure_logged_in_cookie, true );
if ( COOKIEPATH !== SITECOOKIEPATH ) {
setcookie( LOGGED_IN_COOKIE, $logged_in_cookie, $expire, SITECOOKIEPATH, COOKIE_DOMAIN, $secure_logged_in_cookie, true );
}
}
endif;

if ( ! function_exists( 'wp_clear_auth_cookie' ) ) :
/**
* Removes all of the cookies associated with authentication.
*
* @since 2.5.0
*/
function wp_clear_auth_cookie() {
/**
* Fires just before the authentication cookies are cleared.
*
* @since 2.7.0
*/
do_action( 'clear_auth_cookie' );

/** This filter is documented in wp-includes/pluggable.php */
if ( ! apply_filters( 'send_auth_cookies', true, 0, 0, 0, '', '' ) ) {
return;
}

// Auth cookies.
setcookie( AUTH_COOKIE, ' ', time() - YEAR_IN_SECONDS, ADMIN_COOKIE_PATH, COOKIE_DOMAIN );
setcookie( SECURE_AUTH_COOKIE, ' ', time() - YEAR_IN_SECONDS, ADMIN_COOKIE_PATH, COOKIE_DOMAIN );
setcookie( AUTH_COOKIE, ' ', time() - YEAR_IN_SECONDS, PLUGINS_COOKIE_PATH, COOKIE_DOMAIN );
setcookie( SECURE_AUTH_COOKIE, ' ', time() - YEAR_IN_SECONDS, PLUGINS_COOKIE_PATH, COOKIE_DOMAIN );
setcookie( LOGGED_IN_COOKIE, ' ', time() - YEAR_IN_SECONDS, COOKIEPATH, COOKIE_DOMAIN );
setcookie( LOGGED_IN_COOKIE, ' ', time() - YEAR_IN_SECONDS, SITECOOKIEPATH, COOKIE_DOMAIN );

// Settings cookies.
setcookie( 'wp-settings-' . get_current_user_id(), ' ', time() - YEAR_IN_SECONDS, SITECOOKIEPATH );
setcookie( 'wp-settings-time-' . get_current_user_id(), ' ', time() - YEAR_IN_SECONDS, SITECOOKIEPATH );

// Old cookies.
setcookie( AUTH_COOKIE, ' ', time() - YEAR_IN_SECONDS, COOKIEPATH, COOKIE_DOMAIN );
setcookie( AUTH_COOKIE, ' ', time() - YEAR_IN_SECONDS, SITECOOKIEPATH, COOKIE_DOMAIN );
setcookie( SECURE_AUTH_COOKIE, ' ', time() - YEAR_IN_SECONDS, COOKIEPATH, COOKIE_DOMAIN );
setcookie( SECURE_AUTH_COOKIE, ' ', time() - YEAR_IN_SECONDS, SITECOOKIEPATH, COOKIE_DOMAIN );

// Even older cookies.
setcookie( USER_COOKIE, ' ', time() - YEAR_IN_SECONDS, COOKIEPATH, COOKIE_DOMAIN );
setcookie( PASS_COOKIE, ' ', time() - YEAR_IN_SECONDS, COOKIEPATH, COOKIE_DOMAIN );
setcookie( USER_COOKIE, ' ', time() - YEAR_IN_SECONDS, SITECOOKIEPATH, COOKIE_DOMAIN );
setcookie( PASS_COOKIE, ' ', time() - YEAR_IN_SECONDS, SITECOOKIEPATH, COOKIE_DOMAIN );

// Post password cookie.
setcookie( 'wp-postpass_' . COOKIEHASH, ' ', time() - YEAR_IN_SECONDS, COOKIEPATH, COOKIE_DOMAIN );
}
endif;

if ( ! function_exists( 'is_user_logged_in' ) ) :
/**
* Determines whether the current visitor is a logged in user.
*
* For more information on this and similar theme functions, check out
* the {@link https://developer.wordpress.org/themes/basics/conditional-tags/
* Conditional Tags} article in the Theme Developer Handbook.
*
* @since 2.0.0
*
* @return bool True if user is logged in, false if not logged in.
*/
function is_user_logged_in() {
$user = wp_get_current_user();

return $user->exists();
}
endif;

if ( ! function_exists( 'auth_redirect' ) ) :
/**
* Checks if a user is logged in, if not it redirects them to the login page.
*
* When this code is called from a page, it checks to see if the user viewing the page is logged in.
* If the user is not logged in, they are redirected to the login page. The user is redirected
* in such a way that, upon logging in, they will be sent directly to the page they were originally
* trying to access.
*
* @since 1.5.0
*/
function auth_redirect() {
$secure = ( is_ssl() || force_ssl_admin() );

/**
* Filters whether to use a secure authentication redirect.
*
* @since 3.1.0
*
* @param bool $secure Whether to use a secure authentication redirect. Default false.
*/
$secure = apply_filters( 'secure_auth_redirect', $secure );

// If https is required and request is http, redirect.
if ( $secure && ! is_ssl() && str_contains( $_SERVER['REQUEST_URI'], 'wp-admin' ) ) {
if ( str_starts_with( $_SERVER['REQUEST_URI'], 'http' ) ) {
wp_redirect( set_url_scheme( $_SERVER['REQUEST_URI'], 'https' ) );
exit;
} else {
wp_redirect( 'https://' . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI'] );
exit;
}
}

/**
* Filters the authentication redirect scheme.
*
* @since 2.9.0
*
* @param string $scheme Authentication redirect scheme. Default empty.
*/
$scheme = apply_filters( 'auth_redirect_scheme', '' );

$user_id = wp_validate_auth_cookie( '', $scheme );
if ( $user_id ) {
/**
* Fires before the authentication redirect.
*
* @since 2.8.0
*
* @param int $user_id User ID.
*/
do_action( 'auth_redirect', $user_id );

// If the user wants ssl but the session is not ssl, redirect.
if ( ! $secure && get_user_option( 'use_ssl', $user_id ) && str_contains( $_SERVER['REQUEST_URI'], 'wp-admin' ) ) {
if ( str_starts_with( $_SERVER['REQUEST_URI'], 'http' ) ) {
wp_redirect( set_url_scheme( $_SERVER['REQUEST_URI'], 'https' ) );
exit;
} else {
wp_redirect( 'https://' . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI'] );
exit;
}
}

return; // The cookie is good, so we're done.
}

// The cookie is no good, so force login.
nocache_headers();

if ( str_contains( $_SERVER['REQUEST_URI'], '/options.php' ) && wp_get_referer() ) {
$redirect = wp_get_referer();
} else {
$redirect = set_url_scheme( 'http://' . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI'] );
}

$login_url = wp_login_url( $redirect, true );

wp_redirect( $login_url );
exit;
}
endif;

if ( ! function_exists( 'check_admin_referer' ) ) :
/**
* Ensures intent by verifying that a user was referred from another admin page with the correct security nonce.
*
* This function ensures the user intends to perform a given action, which helps protect against clickjacking style
* attacks. It verifies intent, not authorization, therefore it does not verify the user's capabilities. This should
* be performed with `current_user_can()` or similar.
*
* If the nonce value is invalid, the function will exit with an "Are You Sure?" style message.
*
* @since 1.2.0
* @since 2.5.0 The `$query_arg` parameter was added.
*
* @param int|string $action The nonce action.
* @param string $query_arg Optional. Key to check for nonce in `$_REQUEST`. Default '_wpnonce'.
* @return int|false 1 if the nonce is valid and generated between 0-12 hours ago,
* 2 if the nonce is valid and generated between 12-24 hours ago.
* False if the nonce is invalid.
*/
function check_admin_referer( $action = -1, $query_arg = '_wpnonce' ) {
if ( -1 === $action ) {
_doing_it_wrong( __FUNCTION__, __( 'You should specify an action to be verified by using the first parameter.' ), '3.2.0' );
}

$adminurl = strtolower( admin_url() );
$referer = strtolower( wp_get_referer() );
$result = isset( $_REQUEST[ $query_arg ] ) ? wp_verify_nonce( $_REQUEST[ $query_arg ], $action ) : false;

/**
* Fires once the admin request has been validated or not.
*
* @since 1.5.1
*
* @param string $action The nonce action.
* @param false|int $result False if the nonce is invalid, 1 if the nonce is valid and generated between
* 0-12 hours ago, 2 if the nonce is valid and generated between 12-24 hours ago.
*/
do_action( 'check_admin_referer', $action, $result );

if ( ! $result && ! ( -1 === $action && str_starts_with( $referer, $adminurl ) ) ) {
wp_nonce_ays( $action );
die();
}

return $result;
}
endif;

if ( ! function_exists( 'check_ajax_referer' ) ) :
/**
* Verifies the Ajax request to prevent processing requests external of the blog.
*
* @since 2.0.3
*
* @param int|string $action Action nonce.
* @param false|string $query_arg Optional. Key to check for the nonce in `$_REQUEST` (since 2.5). If false,
* `$_REQUEST` values will be evaluated for '_ajax_nonce', and '_wpnonce'
* (in that order). Default false.
* @param bool $stop Optional. Whether to stop early when the nonce cannot be verified.
* Default true.
* @return int|false 1 if the nonce is valid and generated between 0-12 hours ago,
* 2 if the nonce is valid and generated between 12-24 hours ago.
* False if the nonce is invalid.
*/
function check_ajax_referer( $action = -1, $query_arg = false, $stop = true ) {
if ( -1 === $action ) {
_doing_it_wrong( __FUNCTION__, __( 'You should specify an action to be verified by using the first parameter.' ), '4.7.0' );
}

$nonce = '';

if ( $query_arg && isset( $_REQUEST[ $query_arg ] ) ) {
$nonce = $_REQUEST[ $query_arg ];
} elseif ( isset( $_REQUEST['_ajax_nonce'] ) ) {
$nonce = $_REQUEST['_ajax_nonce'];
} elseif ( isset( $_REQUEST['_wpnonce'] ) ) {
$nonce = $_REQUEST['_wpnonce'];
}

$result = wp_verify_nonce( $nonce, $action );

/**
* Fires once the Ajax request has been validated or not.
*
* @since 2.1.0
*
* @param string $action The Ajax nonce action.
* @param false|int $result False if the nonce is invalid, 1 if the nonce is valid and generated between
* 0-12 hours ago, 2 if the nonce is valid and generated between 12-24 hours ago.
*/
do_action( 'check_ajax_referer', $action, $result );

if ( $stop && false === $result ) {
if ( wp_doing_ajax() ) {
wp_die( -1, 403 );
} else {
die( '-1' );
}
}

return $result;
}
endif;

if ( ! function_exists( 'wp_redirect' ) ) :
/**
* Redirects to another page.
*
* Note: wp_redirect() does not exit automatically, and should almost always be
* followed by a call to `exit;`:
*
* wp_redirect( $url );
* exit;
*
* Exiting can also be selectively manipulated by using wp_redirect() as a conditional
* in conjunction with the {@see 'wp_redirect'} and {@see 'wp_redirect_status'} filters:
*
* if ( wp_redirect( $url ) ) {
* exit;
* }
*
* @since 1.5.1
* @since 5.1.0 The `$x_redirect_by` parameter was added.
* @since 5.4.0 On invalid status codes, wp_die() is called.
*
* @global bool $is_IIS
*
* @param string $location The path or URL to redirect to.
* @param int $status Optional. HTTP response status code to use. Default '302' (Moved Temporarily).
* @param string|false $x_redirect_by Optional. The application doing the redirect or false to omit. Default 'WordPress'.
* @return bool False if the redirect was canceled, true otherwise.
*/
function wp_redirect( $location, $status = 302, $x_redirect_by = 'WordPress' ) {
global $is_IIS;

/**
* Filters the redirect location.
*
* @since 2.1.0
*
* @param string $location The path or URL to redirect to.
* @param int $status The HTTP response status code to use.
*/
$location = apply_filters( 'wp_redirect', $location, $status );

/**
* Filters the redirect HTTP response status code to use.
*
* @since 2.3.0
*
* @param int $status The HTTP response status code to use.
* @param string $location The path or URL to redirect to.
*/
$status = apply_filters( 'wp_redirect_status', $status, $location );

if ( ! $location ) {
return false;
}

if ( $status < 300 || 399 < $status ) {
wp_die( __( 'HTTP redirect status code must be a redirection code, 3xx.' ) );
}

$location = wp_sanitize_redirect( $location );

if ( ! $is_IIS && 'cgi-fcgi' !== PHP_SAPI ) {
status_header( $status ); // This causes problems on IIS and some FastCGI setups.
}

/**
* Filters the X-Redirect-By header.
*
* Allows applications to identify themselves when they're doing a redirect.
*
* @since 5.1.0
*
* @param string|false $x_redirect_by The application doing the redirect or false to omit the header.
* @param int $status Status code to use.
* @param string $location The path to redirect to.
*/
$x_redirect_by = apply_filters( 'x_redirect_by', $x_redirect_by, $status, $location );
if ( is_string( $x_redirect_by ) ) {
header( "X-Redirect-By: $x_redirect_by" );
}

header( "Location: $location", true, $status );

return true;
}
endif;

if ( ! function_exists( 'wp_sanitize_redirect' ) ) :
/**
* Sanitizes a URL for use in a redirect.
*
* @since 2.3.0
*
* @param string $location The path to redirect to.
* @return string Redirect-sanitized URL.
*/
function wp_sanitize_redirect( $location ) {
// Encode spaces.
$location = str_replace( ' ', '%20', $location );

$regex = '/
(
(?: [\xC2-\xDF][\x80-\xBF] # double-byte sequences 110xxxxx 10xxxxxx
| \xE0[\xA0-\xBF][\x80-\xBF] # triple-byte sequences 1110xxxx 10xxxxxx * 2
| [\xE1-\xEC][\x80-\xBF]{2}
| \xED[\x80-\x9F][\x80-\xBF]
| [\xEE-\xEF][\x80-\xBF]{2}
| \xF0[\x90-\xBF][\x80-\xBF]{2} # four-byte sequences 11110xxx 10xxxxxx * 3
| [\xF1-\xF3][\x80-\xBF]{3}
| \xF4[\x80-\x8F][\x80-\xBF]{2}
){1,40} # ...one or more times
)/x';
$location = preg_replace_callback( $regex, '_wp_sanitize_utf8_in_redirect', $location );
$location = preg_replace( '|[^a-z0-9-~+_.?#=&;,/:%!*\[\]()@]|i', '', $location );
$location = wp_kses_no_null( $location );

// Remove %0D and %0A from location.
$strip = array( '%0d', '%0a', '%0D', '%0A' );
return _deep_replace( $strip, $location );
}

/**
* URL encodes UTF-8 characters in a URL.
*
* @ignore
* @since 4.2.0
* @access private
*
* @see wp_sanitize_redirect()
*
* @param array $matches RegEx matches against the redirect location.
* @return string URL-encoded version of the first RegEx match.
*/
function _wp_sanitize_utf8_in_redirect( $matches ) {
return urlencode( $matches[0] );
}
endif;

if ( ! function_exists( 'wp_safe_redirect' ) ) :
/**
* Performs a safe (local) redirect, using wp_redirect().
*
* Checks whether the $location is using an allowed host, if it has an absolute
* path. A plugin can therefore set or remove allowed host(s) to or from the
* list.
*
* If the host is not allowed, then the redirect defaults to wp-admin on the siteurl
* instead. This prevents malicious redirects which redirect to another host,
* but only used in a few places.
*
* Note: wp_safe_redirect() does not exit automatically, and should almost always be
* followed by a call to `exit;`:
*
* wp_safe_redirect( $url );
* exit;
*
* Exiting can also be selectively manipulated by using wp_safe_redirect() as a conditional
* in conjunction with the {@see 'wp_redirect'} and {@see 'wp_redirect_status'} filters:
*
* if ( wp_safe_redirect( $url ) ) {
* exit;
* }
*
* @since 2.3.0
* @since 5.1.0 The return value from wp_redirect() is now passed on, and the `$x_redirect_by` parameter was added.
*
* @param string $location The path or URL to redirect to.
* @param int $status Optional. HTTP response status code to use. Default '302' (Moved Temporarily).
* @param string|false $x_redirect_by Optional. The application doing the redirect or false to omit. Default 'WordPress'.
* @return bool False if the redirect was canceled, true otherwise.
*/
function wp_safe_redirect( $location, $status = 302, $x_redirect_by = 'WordPress' ) {

// Need to look at the URL the way it will end up in wp_redirect().
$location = wp_sanitize_redirect( $location );

/**
* Filters the redirect fallback URL for when the provided redirect is not safe (local).
*
* @since 4.3.0
*
* @param string $fallback_url The fallback URL to use by default.
* @param int $status The HTTP response status code to use.
*/
$fallback_url = apply_filters( 'wp_safe_redirect_fallback', admin_url(), $status );

$location = wp_validate_redirect( $location, $fallback_url );

return wp_redirect( $location, $status, $x_redirect_by );
}
endif;

if ( ! function_exists( 'wp_validate_redirect' ) ) :
/**
* Validates a URL for use in a redirect.
*
* Checks whether the $location is using an allowed host, if it has an absolute
* path. A plugin can therefore set or remove allowed host(s) to or from the
* list.
*
* If the host is not allowed, then the redirect is to $fallback_url supplied.
*
* @since 2.8.1
*
* @param string $location The redirect to validate.
* @param string $fallback_url The value to return if $location is not allowed.
* @return string Redirect-sanitized URL.
*/
function wp_validate_redirect( $location, $fallback_url = '' ) {
$location = wp_sanitize_redirect( trim( $location, " \t\n\r\0\x08\x0B" ) );
// Browsers will assume 'http' is your protocol, and will obey a redirect to a URL starting with '//'.
if ( str_starts_with( $location, '//' ) ) {
$location = 'http:' . $location;
}

/*
* In PHP 5 parse_url() may fail if the URL query part contains 'http://'.
* See https://bugs.php.net/bug.php?id=38143
*/
$cut = strpos( $location, '?' );
$test = $cut ? substr( $location, 0, $cut ) : $location;

$lp = parse_url( $test );

// Give up if malformed URL.
if ( false === $lp ) {
return $fallback_url;
}

// Allow only 'http' and 'https' schemes. No 'data:', etc.
if ( isset( $lp['scheme'] ) && ! ( 'http' === $lp['scheme'] || 'https' === $lp['scheme'] ) ) {
return $fallback_url;
}

if ( ! isset( $lp['host'] ) && ! empty( $lp['path'] ) && '/' !== $lp['path'][0] ) {
$path = '';
if ( ! empty( $_SERVER['REQUEST_URI'] ) ) {
$path = dirname( parse_url( 'http://placeholder' . $_SERVER['REQUEST_URI'], PHP_URL_PATH ) . '?' );
$path = wp_normalize_path( $path );
}
$location = '/' . ltrim( $path . '/', '/' ) . $location;
}

/*
* Reject if certain components are set but host is not.
* This catches URLs like https:host.com for which parse_url() does not set the host field.
*/
if ( ! isset( $lp['host'] ) && ( isset( $lp['scheme'] ) || isset( $lp['user'] ) || isset( $lp['pass'] ) || isset( $lp['port'] ) ) ) {
return $fallback_url;
}

// Reject malformed components parse_url() can return on odd inputs.
foreach ( array( 'user', 'pass', 'host' ) as $component ) {
if ( isset( $lp[ $component ] ) && strpbrk( $lp[ $component ], ':/?#@' ) ) {
return $fallback_url;
}
}

$wpp = parse_url( home_url() );

/**
* Filters the list of allowed hosts to redirect to.
*
* @since 2.3.0
*
* @param string[] $hosts An array of allowed host names.
* @param string $host The host name of the redirect destination; empty string if not set.
*/
$allowed_hosts = (array) apply_filters( 'allowed_redirect_hosts', array( $wpp['host'] ), isset( $lp['host'] ) ? $lp['host'] : '' );

if ( isset( $lp['host'] ) && ( ! in_array( $lp['host'], $allowed_hosts, true ) && strtolower( $wpp['host'] ) !== $lp['host'] ) ) {
$location = $fallback_url;
}

return $location;
}
endif;

if ( ! function_exists( 'wp_notify_postauthor' ) ) :
/**
* Notifies an author (and/or others) of a comment/trackback/pingback on a post.
*
* @since 1.0.0
*
* @param int|WP_Comment $comment_id Comment ID or WP_Comment object.
* @param string $deprecated Not used.
* @return bool True on completion. False if no email addresses were specified.
*/
function wp_notify_postauthor( $comment_id, $deprecated = null ) {
if ( null !== $deprecated ) {
_deprecated_argument( __FUNCTION__, '3.8.0' );
}

$comment = get_comment( $comment_id );
if ( empty( $comment ) || empty( $comment->comment_post_ID ) ) {
return false;
}

$post = get_post( $comment->comment_post_ID );
$author = get_userdata( $post->post_author );

// Who to notify? By default, just the post author, but others can be added.
$emails = array();
if ( $author ) {
$emails[] = $author->user_email;
}

/**
* Filters the list of email addresses to receive a comment notification.
*
* By default, only post authors are notified of comments. This filter allows
* others to be added.
*
* @since 3.7.0
*
* @param string[] $emails An array of email addresses to receive a comment notification.
* @param string $comment_id The comment ID as a numeric string.
*/
$emails = apply_filters( 'comment_notification_recipients', $emails, $comment->comment_ID );
$emails = array_filter( $emails );

// If there are no addresses to send the comment to, bail.
if ( ! count( $emails ) ) {
return false;
}

// Facilitate unsetting below without knowing the keys.
$emails = array_flip( $emails );

/**
* Filters whether to notify comment authors of their comments on their own posts.
*
* By default, comment authors aren't notified of their comments on their own
* posts. This filter allows you to override that.
*
* @since 3.8.0
*
* @param bool $notify Whether to notify the post author of their own comment.
* Default false.
* @param string $comment_id The comment ID as a numeric string.
*/
$notify_author = apply_filters( 'comment_notification_notify_author', false, $comment->comment_ID );

// The comment was left by the author.
if ( $author && ! $notify_author && (int) $comment->user_id === (int) $post->post_author ) {
unset( $emails[ $author->user_email ] );
}

// The author moderated a comment on their own post.
if ( $author && ! $notify_author && get_current_user_id() === (int) $post->post_author ) {
unset( $emails[ $author->user_email ] );
}

// The post author is no longer a member of the blog.
if ( $author && ! $notify_author && ! user_can( $post->post_author, 'read_post', $post->ID ) ) {
unset( $emails[ $author->user_email ] );
}

// If there's no email to send the comment to, bail, otherwise flip array back around for use below.
if ( ! count( $emails ) ) {
return false;
} else {
$emails = array_flip( $emails );
}

$comment_author_domain = '';
if ( WP_Http::is_ip_address( $comment->comment_author_IP ) ) {
$comment_author_domain = gethostbyaddr( $comment->comment_author_IP );
}

/*
* The blogname option is escaped with esc_html() on the way into the database in sanitize_option().
* We want to reverse this for the plain text arena of emails.
*/
$blogname = wp_specialchars_decode( get_option( 'blogname' ), ENT_QUOTES );
$comment_content = wp_specialchars_decode( $comment->comment_content );

$wp_email = 'wordpress@' . preg_replace( '#^www\.#', '', wp_parse_url( network_home_url(), PHP_URL_HOST ) );

if ( '' === $comment->comment_author ) {
$from = "From: \"$blogname\" <$wp_email>";
if ( '' !== $comment->comment_author_email ) {
$reply_to = "Reply-To: $comment->comment_author_email";
}
} else {
$from = "From: \"$comment->comment_author\" <$wp_email>";
if ( '' !== $comment->comment_author_email ) {
$reply_to = "Reply-To: \"$comment->comment_author_email\" <$comment->comment_author_email>";
}
}

$message_headers = "$from\n"
. 'Content-Type: text/plain; charset="' . get_option( 'blog_charset' ) . "\"\n";

if ( isset( $reply_to ) ) {
$message_headers .= $reply_to . "\n";
}

/**
* Filters the comment notification email headers.
*
* @since 1.5.2
*
* @param string $message_headers Headers for the comment notification email.
* @param string $comment_id Comment ID as a numeric string.
*/
$message_headers = apply_filters( 'comment_notification_headers', $message_headers, $comment->comment_ID );

foreach ( $emails as $email ) {
$user = get_user_by( 'email', $email );

if ( $user ) {
$switched_locale = switch_to_user_locale( $user->ID );
} else {
$switched_locale = switch_to_locale( get_locale() );
}

switch ( $comment->comment_type ) {
case 'trackback':
/* translators: %s: Post title. */
$notify_message = sprintf( __( 'New trackback on your post "%s"' ), $post->post_title ) . "\r\n";
/* translators: 1: Trackback/pingback website name, 2: Website IP address, 3: Website hostname. */
$notify_message .= sprintf( __( 'Website: %1$s (IP address: %2$s, %3$s)' ), $comment->comment_author, $comment->comment_author_IP, $comment_author_domain ) . "\r\n";
/* translators: %s: Trackback/pingback/comment author URL. */
$notify_message .= sprintf( __( 'URL: %s' ), $comment->comment_author_url ) . "\r\n";
/* translators: %s: Comment text. */
$notify_message .= sprintf( __( 'Comment: %s' ), "\r\n" . $comment_content ) . "\r\n\r\n";
$notify_message .= __( 'You can see all trackbacks on this post here:' ) . "\r\n";
/* translators: Trackback notification email subject. 1: Site title, 2: Post title. */
$subject = sprintf( __( '[%1$s] Trackback: "%2$s"' ), $blogname, $post->post_title );
break;

case 'pingback':
/* translators: %s: Post title. */
$notify_message = sprintf( __( 'New pingback on your post "%s"' ), $post->post_title ) . "\r\n";
/* translators: 1: Trackback/pingback website name, 2: Website IP address, 3: Website hostname. */
$notify_message .= sprintf( __( 'Website: %1$s (IP address: %2$s, %3$s)' ), $comment->comment_author, $comment->comment_author_IP, $comment_author_domain ) . "\r\n";
/* translators: %s: Trackback/pingback/comment author URL. */
$notify_message .= sprintf( __( 'URL: %s' ), $comment->comment_author_url ) . "\r\n";
/* translators: %s: Comment text. */
$notify_message .= sprintf( __( 'Comment: %s' ), "\r\n" . $comment_content ) . "\r\n\r\n";
$notify_message .= __( 'You can see all pingbacks on this post here:' ) . "\r\n";
/* translators: Pingback notification email subject. 1: Site title, 2: Post title. */
$subject = sprintf( __( '[%1$s] Pingback: "%2$s"' ), $blogname, $post->post_title );
break;

default: // Comments.
/* translators: %s: Post title. */
$notify_message = sprintf( __( 'New comment on your post "%s"' ), $post->post_title ) . "\r\n";
/* translators: 1: Comment author's name, 2: Comment author's IP address, 3: Comment author's hostname. */
$notify_message .= sprintf( __( 'Author: %1$s (IP address: %2$s, %3$s)' ), $comment->comment_author, $comment->comment_author_IP, $comment_author_domain ) . "\r\n";
/* translators: %s: Comment author email. */
$notify_message .= sprintf( __( 'Email: %s' ), $comment->comment_author_email ) . "\r\n";
/* translators: %s: Trackback/pingback/comment author URL. */
$notify_message .= sprintf( __( 'URL: %s' ), $comment->comment_author_url ) . "\r\n";

if ( $comment->comment_parent && user_can( $post->post_author, 'edit_comment', $comment->comment_parent ) ) {
/* translators: Comment moderation. %s: Parent comment edit URL. */
$notify_message .= sprintf( __( 'In reply to: %s' ), admin_url( "comment.php?action=editcomment&c={$comment->comment_parent}#wpbody-content" ) ) . "\r\n";
}

/* translators: %s: Comment text. */
$notify_message .= sprintf( __( 'Comment: %s' ), "\r\n" . $comment_content ) . "\r\n\r\n";
$notify_message .= __( 'You can see all comments on this post here:' ) . "\r\n";
/* translators: Comment notification email subject. 1: Site title, 2: Post title. */
$subject = sprintf( __( '[%1$s] Comment: "%2$s"' ), $blogname, $post->post_title );
break;
}

$notify_message .= get_permalink( $comment->comment_post_ID ) . "#comments\r\n\r\n";
/* translators: %s: Comment URL. */
$notify_message .= sprintf( __( 'Permalink: %s' ), get_comment_link( $comment ) ) . "\r\n";

if ( user_can( $post->post_author, 'edit_comment', $comment->comment_ID ) ) {
if ( EMPTY_TRASH_DAYS ) {
/* translators: Comment moderation. %s: Comment action URL. */
$notify_message .= sprintf( __( 'Trash it: %s' ), admin_url( "comment.php?action=trash&c={$comment->comment_ID}#wpbody-content" ) ) . "\r\n";
} else {
/* translators: Comment moderation. %s: Comment action URL. */
$notify_message .= sprintf( __( 'Delete it: %s' ), admin_url( "comment.php?action=delete&c={$comment->comment_ID}#wpbody-content" ) ) . "\r\n";
}
/* translators: Comment moderation. %s: Comment action URL. */
$notify_message .= sprintf( __( 'Spam it: %s' ), admin_url( "comment.php?action=spam&c={$comment->comment_ID}#wpbody-content" ) ) . "\r\n";
}

/**
* Filters the comment notification email text.
*
* @since 1.5.2
*
* @param string $notify_message The comment notification email text.
* @param string $comment_id Comment ID as a numeric string.
*/
$notify_message = apply_filters( 'comment_notification_text', $notify_message, $comment->comment_ID );

/**
* Filters the comment notification email subject.
*
* @since 1.5.2
*
* @param string $subject The comment notification email subject.
* @param string $comment_id Comment ID as a numeric string.
*/
$subject = apply_filters( 'comment_notification_subject', $subject, $comment->comment_ID );

wp_mail( $email, wp_specialchars_decode( $subject ), $notify_message, $message_headers );

if ( $switched_locale ) {
restore_previous_locale();
}
}

return true;
}
endif;

if ( ! function_exists( 'wp_notify_moderator' ) ) :
/**
* Notifies the moderator of the site about a new comment that is awaiting approval.
*
* @since 1.0.0
*
* @global wpdb $wpdb WordPress database abstraction object.
*
* Uses the {@see 'notify_moderator'} filter to determine whether the site moderator
* should be notified, overriding the site setting.
*
* @param int $comment_id Comment ID.
* @return true Always returns true.
*/
function wp_notify_moderator( $comment_id ) {
global $wpdb;

$maybe_notify = get_option( 'moderation_notify' );

/**
* Filters whether to send the site moderator email notifications, overriding the site setting.
*
* @since 4.4.0
*
* @param bool $maybe_notify Whether to notify blog moderator.
* @param int $comment_id The ID of the comment for the notification.
*/
$maybe_notify = apply_filters( 'notify_moderator', $maybe_notify, $comment_id );

if ( ! $maybe_notify ) {
return true;
}

$comment = get_comment( $comment_id );
$post = get_post( $comment->comment_post_ID );
$user = get_userdata( $post->post_author );
// Send to the administration and to the post author if the author can modify the comment.
$emails = array( get_option( 'admin_email' ) );
if ( $user && user_can( $user->ID, 'edit_comment', $comment_id ) && ! empty( $user->user_email ) ) {
if ( 0 !== strcasecmp( $user->user_email, get_option( 'admin_email' ) ) ) {
$emails[] = $user->user_email;
}
}

$comment_author_domain = '';
if ( WP_Http::is_ip_address( $comment->comment_author_IP ) ) {
$comment_author_domain = gethostbyaddr( $comment->comment_author_IP );
}

$comments_waiting = $wpdb->get_var( "SELECT COUNT(*) FROM $wpdb->comments WHERE comment_approved = '0'" );

/*
* The blogname option is escaped with esc_html() on the way into the database in sanitize_option().
* We want to reverse this for the plain text arena of emails.
*/
$blogname = wp_specialchars_decode( get_option( 'blogname' ), ENT_QUOTES );
$comment_content = wp_specialchars_decode( $comment->comment_content );

$message_headers = '';

/**
* Filters the list of recipients for comment moderation emails.
*
* @since 3.7.0
*
* @param string[] $emails List of email addresses to notify for comment moderation.
* @param int $comment_id Comment ID.
*/
$emails = apply_filters( 'comment_moderation_recipients', $emails, $comment_id );

/**
* Filters the comment moderation email headers.
*
* @since 2.8.0
*
* @param string $message_headers Headers for the comment moderation email.
* @param int $comment_id Comment ID.
*/
$message_headers = apply_filters( 'comment_moderation_headers', $message_headers, $comment_id );

foreach ( $emails as $email ) {
$user = get_user_by( 'email', $email );

if ( $user ) {
$switched_locale = switch_to_user_locale( $user->ID );
} else {
$switched_locale = switch_to_locale( get_locale() );
}

switch ( $comment->comment_type ) {
case 'trackback':
/* translators: %s: Post title. */
$notify_message = sprintf( __( 'A new trackback on the post "%s" is waiting for your approval' ), $post->post_title ) . "\r\n";
$notify_message .= get_permalink( $comment->comment_post_ID ) . "\r\n\r\n";
/* translators: 1: Trackback/pingback website name, 2: Website IP address, 3: Website hostname. */
$notify_message .= sprintf( __( 'Website: %1$s (IP address: %2$s, %3$s)' ), $comment->comment_author, $comment->comment_author_IP, $comment_author_domain ) . "\r\n";
/* translators: %s: Trackback/pingback/comment author URL. */
$notify_message .= sprintf( __( 'URL: %s' ), $comment->comment_author_url ) . "\r\n";
$notify_message .= __( 'Trackback excerpt: ' ) . "\r\n" . $comment_content . "\r\n\r\n";
break;

case 'pingback':
/* translators: %s: Post title. */
$notify_message = sprintf( __( 'A new pingback on the post "%s" is waiting for your approval' ), $post->post_title ) . "\r\n";
$notify_message .= get_permalink( $comment->comment_post_ID ) . "\r\n\r\n";
/* translators: 1: Trackback/pingback website name, 2: Website IP address, 3: Website hostname. */
$notify_message .= sprintf( __( 'Website: %1$s (IP address: %2$s, %3$s)' ), $comment->comment_author, $comment->comment_author_IP, $comment_author_domain ) . "\r\n";
/* translators: %s: Trackback/pingback/comment author URL. */
$notify_message .= sprintf( __( 'URL: %s' ), $comment->comment_author_url ) . "\r\n";
$notify_message .= __( 'Pingback excerpt: ' ) . "\r\n" . $comment_content . "\r\n\r\n";
break;

default: // Comments.
/* translators: %s: Post title. */
$notify_message = sprintf( __( 'A new comment on the post "%s" is waiting for your approval' ), $post->post_title ) . "\r\n";
$notify_message .= get_permalink( $comment->comment_post_ID ) . "\r\n\r\n";
/* translators: 1: Comment author's name, 2: Comment author's IP address, 3: Comment author's hostname. */
$notify_message .= sprintf( __( 'Author: %1$s (IP address: %2$s, %3$s)' ), $comment->comment_author, $comment->comment_author_IP, $comment_author_domain ) . "\r\n";
/* translators: %s: Comment author email. */
$notify_message .= sprintf( __( 'Email: %s' ), $comment->comment_author_email ) . "\r\n";
/* translators: %s: Trackback/pingback/comment author URL. */
$notify_message .= sprintf( __( 'URL: %s' ), $comment->comment_author_url ) . "\r\n";

if ( $comment->comment_parent ) {
/* translators: Comment moderation. %s: Parent comment edit URL. */
$notify_message .= sprintf( __( 'In reply to: %s' ), admin_url( "comment.php?action=editcomment&c={$comment->comment_parent}#wpbody-content" ) ) . "\r\n";
}

/* translators: %s: Comment text. */
$notify_message .= sprintf( __( 'Comment: %s' ), "\r\n" . $comment_content ) . "\r\n\r\n";
break;
}

/* translators: Comment moderation. %s: Comment action URL. */
$notify_message .= sprintf( __( 'Approve it: %s' ), admin_url( "comment.php?action=approve&c={$comment_id}#wpbody-content" ) ) . "\r\n";

if ( EMPTY_TRASH_DAYS ) {
/* translators: Comment moderation. %s: Comment action URL. */
$notify_message .= sprintf( __( 'Trash it: %s' ), admin_url( "comment.php?action=trash&c={$comment_id}#wpbody-content" ) ) . "\r\n";
} else {
/* translators: Comment moderation. %s: Comment action URL. */
$notify_message .= sprintf( __( 'Delete it: %s' ), admin_url( "comment.php?action=delete&c={$comment_id}#wpbody-content" ) ) . "\r\n";
}

/* translators: Comment moderation. %s: Comment action URL. */
$notify_message .= sprintf( __( 'Spam it: %s' ), admin_url( "comment.php?action=spam&c={$comment_id}#wpbody-content" ) ) . "\r\n";

$notify_message .= sprintf(
/* translators: Comment moderation. %s: Number of comments awaiting approval. */
_n(
'Currently %s comment is waiting for approval. Please visit the moderation panel:',
'Currently %s comments are waiting for approval. Please visit the moderation panel:',
$comments_waiting
),
number_format_i18n( $comments_waiting )
) . "\r\n";
$notify_message .= admin_url( 'edit-comments.php?comment_status=moderated#wpbody-content' ) . "\r\n";

/* translators: Comment moderation notification email subject. 1: Site title, 2: Post title. */
$subject = sprintf( __( '[%1$s] Please moderate: "%2$s"' ), $blogname, $post->post_title );

/**
* Filters the comment moderation email text.
*
* @since 1.5.2
*
* @param string $notify_message Text of the comment moderation email.
* @param int $comment_id Comment ID.
*/
$notify_message = apply_filters( 'comment_moderation_text', $notify_message, $comment_id );

/**
* Filters the comment moderation email subject.
*
* @since 1.5.2
*
* @param string $subject Subject of the comment moderation email.
* @param int $comment_id Comment ID.
*/
$subject = apply_filters( 'comment_moderation_subject', $subject, $comment_id );

wp_mail( $email, wp_specialchars_decode( $subject ), $notify_message, $message_headers );

if ( $switched_locale ) {
restore_previous_locale();
}
}

return true;
}
endif;

if ( ! function_exists( 'wp_password_change_notification' ) ) :
/**
* Notifies the blog admin of a user changing password, normally via email.
*
* @since 2.7.0
*
* @param WP_User $user User object.
*/
function wp_password_change_notification( $user ) {
/*
* Send a copy of password change notification to the admin,
* but check to see if it's the admin whose password we're changing, and skip this.
*/
if ( 0 !== strcasecmp( $user->user_email, get_option( 'admin_email' ) ) ) {

$admin_user = get_user_by( 'email', get_option( 'admin_email' ) );

if ( $admin_user ) {
$switched_locale = switch_to_user_locale( $admin_user->ID );
} else {
$switched_locale = switch_to_locale( get_locale() );
}

/* translators: %s: User name. */
$message = sprintf( __( 'Password changed for user: %s' ), $user->user_login ) . "\r\n";
/*
* The blogname option is escaped with esc_html() on the way into the database in sanitize_option().
* We want to reverse this for the plain text arena of emails.
*/
$blogname = wp_specialchars_decode( get_option( 'blogname' ), ENT_QUOTES );

$wp_password_change_notification_email = array(
'to' => get_option( 'admin_email' ),
/* translators: Password change notification email subject. %s: Site title. */
'subject' => __( '[%s] Password Changed' ),
'message' => $message,
'headers' => '',
);

/**
* Filters the contents of the password change notification email sent to the site admin.
*
* @since 4.9.0
*
* @param array $wp_password_change_notification_email {
* Used to build wp_mail().
*
* @type string $to The intended recipient - site admin email address.
* @type string $subject The subject of the email.
* @type string $message The body of the email.
* @type string $headers The headers of the email.
* }
* @param WP_User $user User object for user whose password was changed.
* @param string $blogname The site title.
*/
$wp_password_change_notification_email = apply_filters( 'wp_password_change_notification_email', $wp_password_change_notification_email, $user, $blogname );

wp_mail(
$wp_password_change_notification_email['to'],
wp_specialchars_decode( sprintf( $wp_password_change_notification_email['subject'], $blogname ) ),
$wp_password_change_notification_email['message'],
$wp_password_change_notification_email['headers']
);

if ( $switched_locale ) {
restore_previous_locale();
}
}
}
endif;

if ( ! function_exists( 'wp_new_user_notification' ) ) :
/**
* Emails login credentials to a newly-registered user.
*
* A new user registration notification is also sent to admin email.
*
* @since 2.0.0
* @since 4.3.0 The `$plaintext_pass` parameter was changed to `$notify`.
* @since 4.3.1 The `$plaintext_pass` parameter was deprecated. `$notify` added as a third parameter.
* @since 4.6.0 The `$notify` parameter accepts 'user' for sending notification only to the user created.
*
* @param int $user_id User ID.
* @param null $deprecated Not used (argument deprecated).
* @param string $notify Optional. Type of notification that should happen. Accepts 'admin' or an empty
* string (admin only), 'user', or 'both' (admin and user). Default empty.
*/
function wp_new_user_notification( $user_id, $deprecated = null, $notify = '' ) {
if ( null !== $deprecated ) {
_deprecated_argument( __FUNCTION__, '4.3.1' );
}

// Accepts only 'user', 'admin' , 'both' or default '' as $notify.
if ( ! in_array( $notify, array( 'user', 'admin', 'both', '' ), true ) ) {
return;
}

$user = get_userdata( $user_id );

/*
* The blogname option is escaped with esc_html() on the way into the database in sanitize_option().
* We want to reverse this for the plain text arena of emails.
*/
$blogname = wp_specialchars_decode( get_option( 'blogname' ), ENT_QUOTES );

/**
* Filters whether the admin is notified of a new user registration.
*
* @since 6.1.0
*
* @param bool $send Whether to send the email. Default true.
* @param WP_User $user User object for new user.
*/
$send_notification_to_admin = apply_filters( 'wp_send_new_user_notification_to_admin', true, $user );

if ( 'user' !== $notify && true === $send_notification_to_admin ) {

$admin_user = get_user_by( 'email', get_option( 'admin_email' ) );

if ( $admin_user ) {
$switched_locale = switch_to_user_locale( $admin_user->ID );
} else {
$switched_locale = switch_to_locale( get_locale() );
}

/* translators: %s: Site title. */
$message = sprintf( __( 'New user registration on your site %s:' ), $blogname ) . "\r\n\r\n";
/* translators: %s: User login. */
$message .= sprintf( __( 'Username: %s' ), $user->user_login ) . "\r\n\r\n";
/* translators: %s: User email address. */
$message .= sprintf( __( 'Email: %s' ), $user->user_email ) . "\r\n";

$wp_new_user_notification_email_admin = array(
'to' => get_option( 'admin_email' ),
/* translators: New user registration notification email subject. %s: Site title. */
'subject' => __( '[%s] New User Registration' ),
'message' => $message,
'headers' => '',
);

/**
* Filters the contents of the new user notification email sent to the site admin.
*
* @since 4.9.0
*
* @param array $wp_new_user_notification_email_admin {
* Used to build wp_mail().
*
* @type string $to The intended recipient - site admin email address.
* @type string $subject The subject of the email.
* @type string $message The body of the email.
* @type string $headers The headers of the email.
* }
* @param WP_User $user User object for new user.
* @param string $blogname The site title.
*/
$wp_new_user_notification_email_admin = apply_filters( 'wp_new_user_notification_email_admin', $wp_new_user_notification_email_admin, $user, $blogname );

wp_mail(
$wp_new_user_notification_email_admin['to'],
wp_specialchars_decode( sprintf( $wp_new_user_notification_email_admin['subject'], $blogname ) ),
$wp_new_user_notification_email_admin['message'],
$wp_new_user_notification_email_admin['headers']
);

if ( $switched_locale ) {
restore_previous_locale();
}
}

/**
* Filters whether the user is notified of their new user registration.
*
* @since 6.1.0
*
* @param bool $send Whether to send the email. Default true.
* @param WP_User $user User object for new user.
*/
$send_notification_to_user = apply_filters( 'wp_send_new_user_notification_to_user', true, $user );

// `$deprecated` was pre-4.3 `$plaintext_pass`. An empty `$plaintext_pass` didn't sent a user notification.
if ( 'admin' === $notify || true !== $send_notification_to_user || ( empty( $deprecated ) && empty( $notify ) ) ) {
return;
}

$key = get_password_reset_key( $user );
if ( is_wp_error( $key ) ) {
return;
}

$switched_locale = switch_to_user_locale( $user_id );

/* translators: %s: User login. */
$message = sprintf( __( 'Username: %s' ), $user->user_login ) . "\r\n\r\n";
$message .= __( 'To set your password, visit the following address:' ) . "\r\n\r\n";

/*
* Since some user login names end in a period, this could produce ambiguous URLs that
* end in a period. To avoid the ambiguity, ensure that the login is not the last query
* arg in the URL. If moving it to the end, a trailing period will need to be escaped.
*
* @see https://core.trac.wordpress.org/tickets/42957
*/
$message .= network_site_url( 'wp-login.php?login=' . rawurlencode( $user->user_login ) . "&key=$key&action=rp", 'login' ) . "\r\n\r\n";

$message .= wp_login_url() . "\r\n";

$wp_new_user_notification_email = array(
'to' => $user->user_email,
/* translators: Login details notification email subject. %s: Site title. */
'subject' => __( '[%s] Login Details' ),
'message' => $message,
'headers' => '',
);

/**
* Filters the contents of the new user notification email sent to the new user.
*
* @since 4.9.0
*
* @param array $wp_new_user_notification_email {
* Used to build wp_mail().
*
* @type string $to The intended recipient - New user email address.
* @type string $subject The subject of the email.
* @type string $message The body of the email.
* @type string $headers The headers of the email.
* }
* @param WP_User $user User object for new user.
* @param string $blogname The site title.
*/
$wp_new_user_notification_email = apply_filters( 'wp_new_user_notification_email', $wp_new_user_notification_email, $user, $blogname );

wp_mail(
$wp_new_user_notification_email['to'],
wp_specialchars_decode( sprintf( $wp_new_user_notification_email['subject'], $blogname ) ),
$wp_new_user_notification_email['message'],
$wp_new_user_notification_email['headers']
);

if ( $switched_locale ) {
restore_previous_locale();
}
}
endif;

if ( ! function_exists( 'wp_nonce_tick' ) ) :
/**
* Returns the time-dependent variable for nonce creation.
*
* A nonce has a lifespan of two ticks. Nonces in their second tick may be
* updated, e.g. by autosave.
*
* @since 2.5.0
* @since 6.1.0 Added `$action` argument.
*
* @param string|int $action Optional. The nonce action. Default -1.
* @return float Float value rounded up to the next highest integer.
*/
function wp_nonce_tick( $action = -1 ) {
/**
* Filters the lifespan of nonces in seconds.
*
* @since 2.5.0
* @since 6.1.0 Added `$action` argument to allow for more targeted filters.
*
* @param int $lifespan Lifespan of nonces in seconds. Default 86,400 seconds, or one day.
* @param string|int $action The nonce action, or -1 if none was provided.
*/
$nonce_life = apply_filters( 'nonce_life', DAY_IN_SECONDS, $action );

return ceil( time() / ( $nonce_life / 2 ) );
}
endif;

if ( ! function_exists( 'wp_verify_nonce' ) ) :
/**
* Verifies that a correct security nonce was used with time limit.
*
* A nonce is valid for 24 hours (by default).
*
* @since 2.0.3
*
* @param string $nonce Nonce value that was used for verification, usually via a form field.
* @param string|int $action Should give context to what is taking place and be the same when nonce was created.
* @return int|false 1 if the nonce is valid and generated between 0-12 hours ago,
* 2 if the nonce is valid and generated between 12-24 hours ago.
* False if the nonce is invalid.
*/
function wp_verify_nonce( $nonce, $action = -1 ) {
$nonce = (string) $nonce;
$user = wp_get_current_user();
$uid = (int) $user->ID;
if ( ! $uid ) {
/**
* Filters whether the user who generated the nonce is logged out.
*
* @since 3.5.0
*
* @param int $uid ID of the nonce-owning user.
* @param string|int $action The nonce action, or -1 if none was provided.
*/
$uid = apply_filters( 'nonce_user_logged_out', $uid, $action );
}

if ( empty( $nonce ) ) {
return false;
}

$token = wp_get_session_token();
$i = wp_nonce_tick( $action );

// Nonce generated 0-12 hours ago.
$expected = substr( wp_hash( $i . '|' . $action . '|' . $uid . '|' . $token, 'nonce' ), -12, 10 );
if ( hash_equals( $expected, $nonce ) ) {
return 1;
}

// Nonce generated 12-24 hours ago.
$expected = substr( wp_hash( ( $i - 1 ) . '|' . $action . '|' . $uid . '|' . $token, 'nonce' ), -12, 10 );
if ( hash_equals( $expected, $nonce ) ) {
return 2;
}

/**
* Fires when nonce verification fails.
*
* @since 4.4.0
*
* @param string $nonce The invalid nonce.
* @param string|int $action The nonce action.
* @param WP_User $user The current user object.
* @param string $token The user's session token.
*/
do_action( 'wp_verify_nonce_failed', $nonce, $action, $user, $token );

// Invalid nonce.
return false;
}
endif;

if ( ! function_exists( 'wp_create_nonce' ) ) :
/**
* Creates a cryptographic token tied to a specific action, user, user session,
* and window of time.
*
* @since 2.0.3
* @since 4.0.0 Session tokens were integrated with nonce creation.
*
* @param string|int $action Scalar value to add context to the nonce.
* @return string The token.
*/
function wp_create_nonce( $action = -1 ) {
$user = wp_get_current_user();
$uid = (int) $user->ID;
if ( ! $uid ) {
/** This filter is documented in wp-includes/pluggable.php */
$uid = apply_filters( 'nonce_user_logged_out', $uid, $action );
}

$token = wp_get_session_token();
$i = wp_nonce_tick( $action );

return substr( wp_hash( $i . '|' . $action . '|' . $uid . '|' . $token, 'nonce' ), -12, 10 );
}
endif;

if ( ! function_exists( 'wp_salt' ) ) :
/**
* Returns a salt to add to hashes.
*
* Salts are created using secret keys. Secret keys are located in two places:
* in the database and in the wp-config.php file. The secret key in the database
* is randomly generated and will be appended to the secret keys in wp-config.php.
*
* The secret keys in wp-config.php should be updated to strong, random keys to maximize
* security. Below is an example of how the secret key constants are defined.
* Do not paste this example directly into wp-config.php. Instead, have a
* {@link https://api.wordpress.org/secret-key/1.1/salt/ secret key created} just
* for you.
*
* define('AUTH_KEY', ' Xakm<o xQy rw4EMsLKM-?!T+,PFF})H4lzcW57AF0U@N@< >M%G4Yt>f`z]MON');
* define('SECURE_AUTH_KEY', 'LzJ}op]mr|6+![P}Ak:uNdJCJZd>(Hx.-Mh#Tz)pCIU#uGEnfFz|f ;;eU%/U^O~');
* define('LOGGED_IN_KEY', '|i|Ux`9<p-h$aFf(qnT:sDO:D1P^wZ$$/Ra@miTJi9G;ddp_<q}6H1)o|a +&JCM');
* define('NONCE_KEY', '%:R{[P|,s.KuMltH5}cI;/k<Gx~j!f0I)m_sIyu+&NJZ)-iO>z7X>QYR0Z_XnZ@|');
* define('AUTH_SALT', 'eZyT)-Naw]F8CwA*VaW#q*|.)g@o}||wf~@C-YSt}(dh_r6EbI#A,y|nU2{B#JBW');
* define('SECURE_AUTH_SALT', '!=oLUTXh,QW=H `}`L|9/^4-3 STz},T(w}W<I`.JjPi)<Bmf1v,HpGe}T1:Xt7n');
* define('LOGGED_IN_SALT', '+XSqHc;@Q*K_b|Z?NC[3H!!EONbh.n<+=uKR:>*c(u`g~EJBf#8u#R{mUEZrozmm');
* define('NONCE_SALT', 'h`GXHhD>SLWVfg1(1(N{;.V!MoE(SfbA_ksP@&`+AycHcAV$+?@3q+rxV{%^VyKT');
*
* Salting passwords helps against tools which has stored hashed values of
* common dictionary strings. The added values makes it harder to crack.
*
* @since 2.5.0
*
* @link https://api.wordpress.org/secret-key/1.1/salt/ Create secrets for wp-config.php
*
* @param string $scheme Authentication scheme (auth, secure_auth, logged_in, nonce).
* @return string Salt value
*/
function wp_salt( $scheme = 'auth' ) {
static $cached_salts = array();
if ( isset( $cached_salts[ $scheme ] ) ) {
/**
* Filters the WordPress salt.
*
* @since 2.5.0
*
* @param string $cached_salt Cached salt for the given scheme.
* @param string $scheme Authentication scheme. Values include 'auth',
* 'secure_auth', 'logged_in', and 'nonce'.
*/
return apply_filters( 'salt', $cached_salts[ $scheme ], $scheme );
}

static $duplicated_keys;
if ( null === $duplicated_keys ) {
$duplicated_keys = array();

foreach ( array( 'AUTH', 'SECURE_AUTH', 'LOGGED_IN', 'NONCE', 'SECRET' ) as $first ) {
foreach ( array( 'KEY', 'SALT' ) as $second ) {
if ( ! defined( "{$first}_{$second}" ) ) {
continue;
}
$value = constant( "{$first}_{$second}" );
$duplicated_keys[ $value ] = isset( $duplicated_keys[ $value ] );
}
}

$duplicated_keys['put your unique phrase here'] = true;

/*
* translators: This string should only be translated if wp-config-sample.php is localized.
* You can check the localized release package or
* https://i18n.svn.wordpress.org/<locale code>/branches/<wp version>/dist/wp-config-sample.php
*/
$duplicated_keys[ __( 'put your unique phrase here' ) ] = true;
}

/*
* Determine which options to prime.
*
* If the salt keys are undefined, use a duplicate value or the
* default `put your unique phrase here` value the salt will be
* generated via `wp_generate_password()` and stored as a site
* option. These options will be primed to avoid repeated
* database requests for undefined salts.
*/
$options_to_prime = array();
foreach ( array( 'auth', 'secure_auth', 'logged_in', 'nonce' ) as $key ) {
foreach ( array( 'key', 'salt' ) as $second ) {
$const = strtoupper( "{$key}_{$second}" );
if ( ! defined( $const ) || true === $duplicated_keys[ constant( $const ) ] ) {
$options_to_prime[] = "{$key}_{$second}";
}
}
}

if ( ! empty( $options_to_prime ) ) {
/*
* Also prime `secret_key` used for undefined salting schemes.
*
* If the scheme is unknown, the default value for `secret_key` will be
* used too for the salt. This should rarely happen, so the option is only
* primed if other salts are undefined.
*
* At this point of execution it is known that a database call will be made
* to prime salts, so the `secret_key` option can be primed regardless of the
* constants status.
*/
$options_to_prime[] = 'secret_key';
wp_prime_site_option_caches( $options_to_prime );
}

$values = array(
'key' => '',
'salt' => '',
);
if ( defined( 'SECRET_KEY' ) && SECRET_KEY && empty( $duplicated_keys[ SECRET_KEY ] ) ) {
$values['key'] = SECRET_KEY;
}
if ( 'auth' === $scheme && defined( 'SECRET_SALT' ) && SECRET_SALT && empty( $duplicated_keys[ SECRET_SALT ] ) ) {
$values['salt'] = SECRET_SALT;
}

if ( in_array( $scheme, array( 'auth', 'secure_auth', 'logged_in', 'nonce' ), true ) ) {
foreach ( array( 'key', 'salt' ) as $type ) {
$const = strtoupper( "{$scheme}_{$type}" );
if ( defined( $const ) && constant( $const ) && empty( $duplicated_keys[ constant( $const ) ] ) ) {
$values[ $type ] = constant( $const );
} elseif ( ! $values[ $type ] ) {
$values[ $type ] = get_site_option( "{$scheme}_{$type}" );
if ( ! $values[ $type ] ) {
$values[ $type ] = wp_generate_password( 64, true, true );
update_site_option( "{$scheme}_{$type}", $values[ $type ] );
}
}
}
} else {
if ( ! $values['key'] ) {
$values['key'] = get_site_option( 'secret_key' );
if ( ! $values['key'] ) {
$values['key'] = wp_generate_password( 64, true, true );
update_site_option( 'secret_key', $values['key'] );
}
}
$values['salt'] = hash_hmac( 'md5', $scheme, $values['key'] );
}

$cached_salts[ $scheme ] = $values['key'] . $values['salt'];

/** This filter is documented in wp-includes/pluggable.php */
return apply_filters( 'salt', $cached_salts[ $scheme ], $scheme );
}
endif;

if ( ! function_exists( 'wp_hash' ) ) :
/**
* Gets hash of given string.
*
* @since 2.0.3
*
* @param string $data Plain text to hash.
* @param string $scheme Authentication scheme (auth, secure_auth, logged_in, nonce).
* @return string Hash of $data.
*/
function wp_hash( $data, $scheme = 'auth' ) {
$salt = wp_salt( $scheme );

return hash_hmac( 'md5', $data, $salt );
}
endif;

if ( ! function_exists( 'wp_hash_password' ) ) :
/**
* Creates a hash of a plain text password.
*
* For integration with other applications, this function can be overwritten to
* instead use the other package password hashing algorithm.
*
* @since 2.5.0
*
* @global PasswordHash $wp_hasher PHPass object.
*
* @param string $password Plain text user password to hash.
* @return string The hash string of the password.
*/
function wp_hash_password( $password ) {
global $wp_hasher;

if ( empty( $wp_hasher ) ) {
require_once ABSPATH . WPINC . '/class-phpass.php';
// By default, use the portable hash from phpass.
$wp_hasher = new PasswordHash( 8, true );
}

return $wp_hasher->HashPassword( trim( $password ) );
}
endif;

if ( ! function_exists( 'wp_check_password' ) ) :
/**
* Checks a plaintext password against a hashed password.
*
* Maintains compatibility between old version and the new cookie authentication
* protocol using PHPass library. The $hash parameter is the encrypted password
* and the function compares the plain text password when encrypted similarly
* against the already encrypted password to see if they match.
*
* For integration with other applications, this function can be overwritten to
* instead use the other package password hashing algorithm.
*
* @since 2.5.0
*
* @global PasswordHash $wp_hasher PHPass object used for checking the password
* against the $hash + $password.
* @uses PasswordHash::CheckPassword
*
* @param string $password Plaintext user's password.
* @param string $hash Hash of the user's password to check against.
* @param string|int $user_id Optional. User ID.
* @return bool False, if the $password does not match the hashed password.
*/
function wp_check_password( $password, $hash, $user_id = '' ) {
global $wp_hasher;

// If the hash is still md5...
if ( strlen( $hash ) <= 32 ) {
$check = hash_equals( $hash, md5( $password ) );
if ( $check && $user_id ) {
// Rehash using new hash.
wp_set_password( $password, $user_id );
$hash = wp_hash_password( $password );
}

/**
* Filters whether the plaintext password matches the encrypted password.
*
* @since 2.5.0
*
* @param bool $check Whether the passwords match.
* @param string $password The plaintext password.
* @param string $hash The hashed password.
* @param string|int $user_id User ID. Can be empty.
*/
return apply_filters( 'check_password', $check, $password, $hash, $user_id );
}

/*
* If the stored hash is longer than an MD5,
* presume the new style phpass portable hash.
*/
if ( empty( $wp_hasher ) ) {
require_once ABSPATH . WPINC . '/class-phpass.php';
// By default, use the portable hash from phpass.
$wp_hasher = new PasswordHash( 8, true );
}

$check = $wp_hasher->CheckPassword( $password, $hash );

/** This filter is documented in wp-includes/pluggable.php */
return apply_filters( 'check_password', $check, $password, $hash, $user_id );
}
endif;

if ( ! function_exists( 'wp_generate_password' ) ) :
/**
* Generates a random password drawn from the defined set of characters.
*
* Uses wp_rand() to create passwords with far less predictability
* than similar native PHP functions like `rand()` or `mt_rand()`.
*
* @since 2.5.0
*
* @param int $length Optional. The length of password to generate. Default 12.
* @param bool $special_chars Optional. Whether to include standard special characters.
* Default true.
* @param bool $extra_special_chars Optional. Whether to include other special characters.
* Used when generating secret keys and salts. Default false.
* @return string The random password.
*/
function wp_generate_password( $length = 12, $special_chars = true, $extra_special_chars = false ) {
$chars = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789';
if ( $special_chars ) {
$chars .= '!@#$%^&*()';
}
if ( $extra_special_chars ) {
$chars .= '-_ []{}<>~`+=,.;:/?|';
}

$password = '';
for ( $i = 0; $i < $length; $i++ ) {
$password .= substr( $chars, wp_rand( 0, strlen( $chars ) - 1 ), 1 );
}

/**
* Filters the randomly-generated password.
*
* @since 3.0.0
* @since 5.3.0 Added the `$length`, `$special_chars`, and `$extra_special_chars` parameters.
*
* @param string $password The generated password.
* @param int $length The length of password to generate.
* @param bool $special_chars Whether to include standard special characters.
* @param bool $extra_special_chars Whether to include other special characters.
*/
return apply_filters( 'random_password', $password, $length, $special_chars, $extra_special_chars );
}
endif;

if ( ! function_exists( 'wp_rand' ) ) :
/**
* Generates a random non-negative number.
*
* @since 2.6.2
* @since 4.4.0 Uses PHP7 random_int() or the random_compat library if available.
* @since 6.1.0 Returns zero instead of a random number if both `$min` and `$max` are zero.
*
* @global string $rnd_value
*
* @param int $min Optional. Lower limit for the generated number.
* Accepts positive integers or zero. Defaults to 0.
* @param int $max Optional. Upper limit for the generated number.
* Accepts positive integers. Defaults to 4294967295.
* @return int A random non-negative number between min and max.
*/
function wp_rand( $min = null, $max = null ) {
global $rnd_value;

/*
* Some misconfigured 32-bit environments (Entropy PHP, for example)
* truncate integers larger than PHP_INT_MAX to PHP_INT_MAX rather than overflowing them to floats.
*/
$max_random_number = 3000000000 === 2147483647 ? (float) '4294967295' : 4294967295; // 4294967295 = 0xffffffff

if ( null === $min ) {
$min = 0;
}

if ( null === $max ) {
$max = $max_random_number;
}

// We only handle ints, floats are truncated to their integer value.
$min = (int) $min;
$max = (int) $max;

// Use PHP's CSPRNG, or a compatible method.
static $use_random_int_functionality = true;
if ( $use_random_int_functionality ) {
try {
// wp_rand() can accept arguments in either order, PHP cannot.
$_max = max( $min, $max );
$_min = min( $min, $max );
$val = random_int( $_min, $_max );
if ( false !== $val ) {
return absint( $val );
} else {
$use_random_int_functionality = false;
}
} catch ( Error $e ) {
$use_random_int_functionality = false;
} catch ( Exception $e ) {
$use_random_int_functionality = false;
}
}

/*
* Reset $rnd_value after 14 uses.
* 32 (md5) + 40 (sha1) + 40 (sha1) / 8 = 14 random numbers from $rnd_value.
*/
if ( strlen( $rnd_value ) < 8 ) {
if ( defined( 'WP_SETUP_CONFIG' ) ) {
static $seed = '';
} else {
$seed = get_transient( 'random_seed' );
}
$rnd_value = md5( uniqid( microtime() . mt_rand(), true ) . $seed );
$rnd_value .= sha1( $rnd_value );
$rnd_value .= sha1( $rnd_value . $seed );
$seed = md5( $seed . $rnd_value );
if ( ! defined( 'WP_SETUP_CONFIG' ) && ! defined( 'WP_INSTALLING' ) ) {
set_transient( 'random_seed', $seed );
}
}

// Take the first 8 digits for our value.
$value = substr( $rnd_value, 0, 8 );

// Strip the first eight, leaving the remainder for the next call to wp_rand().
$rnd_value = substr( $rnd_value, 8 );

$value = abs( hexdec( $value ) );

// Reduce the value to be within the min - max range.
$value = $min + ( $max - $min + 1 ) * $value / ( $max_random_number + 1 );

return abs( (int) $value );
}
endif;

if ( ! function_exists( 'wp_set_password' ) ) :
/**
* Updates the user's password with a new hashed one.
*
* For integration with other applications, this function can be overwritten to
* instead use the other package password checking algorithm.
*
* Please note: This function should be used sparingly and is really only meant for single-time
* application. Leveraging this improperly in a plugin or theme could result in an endless loop
* of password resets if precautions are not taken to ensure it does not execute on every page load.
*
* @since 2.5.0
*
* @global wpdb $wpdb WordPress database abstraction object.
*
* @param string $password The plaintext new user password.
* @param int $user_id User ID.
*/
function wp_set_password( $password, $user_id ) {
global $wpdb;

$old_user_data = get_userdata( $user_id );

$hash = wp_hash_password( $password );
$wpdb->update(
$wpdb->users,
array(
'user_pass' => $hash,
'user_activation_key' => '',
),
array( 'ID' => $user_id )
);

clean_user_cache( $user_id );

/**
* Fires after the user password is set.
*
* @since 6.2.0
* @since 6.7.0 The `$old_user_data` parameter was added.
*
* @param string $password The plaintext password just set.
* @param int $user_id The ID of the user whose password was just set.
* @param WP_User $old_user_data Object containing user's data prior to update.
*/
do_action( 'wp_set_password', $password, $user_id, $old_user_data );
}
endif;

if ( ! function_exists( 'get_avatar' ) ) :
/**
* Retrieves the avatar `<img>` tag for a user, email address, MD5 hash, comment, or post.
*
* @since 2.5.0
* @since 4.2.0 Added the optional `$args` parameter.
* @since 5.5.0 Added the `loading` argument.
* @since 6.1.0 Added the `decoding` argument.
* @since 6.3.0 Added the `fetchpriority` argument.
*
* @param mixed $id_or_email The avatar to retrieve. Accepts a user ID, Gravatar MD5 hash,
* user email, WP_User object, WP_Post object, or WP_Comment object.
* @param int $size Optional. Height and width of the avatar in pixels. Default 96.
* @param string $default_value URL for the default image or a default type. Accepts:
* - '404' (return a 404 instead of a default image)
* - 'retro' (a 8-bit arcade-style pixelated face)
* - 'robohash' (a robot)
* - 'monsterid' (a monster)
* - 'wavatar' (a cartoon face)
* - 'identicon' (the "quilt", a geometric pattern)
* - 'mystery', 'mm', or 'mysteryman' (The Oyster Man)
* - 'blank' (transparent GIF)
* - 'gravatar_default' (the Gravatar logo)
* Default is the value of the 'avatar_default' option,
* with a fallback of 'mystery'.
* @param string $alt Optional. Alternative text to use in the avatar image tag.
* Default empty.
* @param array $args {
* Optional. Extra arguments to retrieve the avatar.
*
* @type int $height Display height of the avatar in pixels. Defaults to $size.
* @type int $width Display width of the avatar in pixels. Defaults to $size.
* @type bool $force_default Whether to always show the default image, never the Gravatar.
* Default false.
* @type string $rating What rating to display avatars up to. Accepts:
* - 'G' (suitable for all audiences)
* - 'PG' (possibly offensive, usually for audiences 13 and above)
* - 'R' (intended for adult audiences above 17)
* - 'X' (even more mature than above)
* Default is the value of the 'avatar_rating' option.
* @type string $scheme URL scheme to use. See set_url_scheme() for accepted values.
* Default null.
* @type array|string $class Array or string of additional classes to add to the img element.
* Default null.
* @type bool $force_display Whether to always show the avatar - ignores the show_avatars option.
* Default false.
* @type string $loading Value for the `loading` attribute.
* Default null.
* @type string $fetchpriority Value for the `fetchpriority` attribute.
* Default null.
* @type string $decoding Value for the `decoding` attribute.
* Default null.
* @type string $extra_attr HTML attributes to insert in the IMG element. Is not sanitized.
* Default empty.
* }
* @return string|false `<img>` tag for the user's avatar. False on failure.
*/
function get_avatar( $id_or_email, $size = 96, $default_value = '', $alt = '', $args = null ) {
$defaults = array(
// get_avatar_data() args.
'size' => 96,
'height' => null,
'width' => null,
'default' => get_option( 'avatar_default', 'mystery' ),
'force_default' => false,
'rating' => get_option( 'avatar_rating' ),
'scheme' => null,
'alt' => '',
'class' => null,
'force_display' => false,
'loading' => null,
'fetchpriority' => null,
'decoding' => null,
'extra_attr' => '',
);

if ( empty( $args ) ) {
$args = array();
}

$args['size'] = (int) $size;
$args['default'] = $default_value;
$args['alt'] = $alt;

$args = wp_parse_args( $args, $defaults );

if ( empty( $args['height'] ) ) {
$args['height'] = $args['size'];
}
if ( empty( $args['width'] ) ) {
$args['width'] = $args['size'];
}

// Update args with loading optimized attributes.
$loading_optimization_attr = wp_get_loading_optimization_attributes( 'img', $args, 'get_avatar' );

$args = array_merge( $args, $loading_optimization_attr );

if ( is_object( $id_or_email ) && isset( $id_or_email->comment_ID ) ) {
$id_or_email = get_comment( $id_or_email );
}

/**
* Allows the HTML for a user's avatar to be returned early.
*
* Returning a non-null value will effectively short-circuit get_avatar(), passing
* the value through the {@see 'get_avatar'} filter and returning early.
*
* @since 4.2.0
*
* @param string|null $avatar HTML for the user's avatar. Default null.
* @param mixed $id_or_email The avatar to retrieve. Accepts a user ID, Gravatar MD5 hash,
* user email, WP_User object, WP_Post object, or WP_Comment object.
* @param array $args Arguments passed to get_avatar_url(), after processing.
*/
$avatar = apply_filters( 'pre_get_avatar', null, $id_or_email, $args );

if ( ! is_null( $avatar ) ) {
/** This filter is documented in wp-includes/pluggable.php */
return apply_filters( 'get_avatar', $avatar, $id_or_email, $args['size'], $args['default'], $args['alt'], $args );
}

if ( ! $args['force_display'] && ! get_option( 'show_avatars' ) ) {
return false;
}

$url2x = get_avatar_url( $id_or_email, array_merge( $args, array( 'size' => $args['size'] * 2 ) ) );

$args = get_avatar_data( $id_or_email, $args );

$url = $args['url'];

if ( ! $url || is_wp_error( $url ) ) {
return false;
}

$class = array( 'avatar', 'avatar-' . (int) $args['size'], 'photo' );

if ( ! $args['found_avatar'] || $args['force_default'] ) {
$class[] = 'avatar-default';
}

if ( $args['class'] ) {
if ( is_array( $args['class'] ) ) {
$class = array_merge( $class, $args['class'] );
} else {
$class[] = $args['class'];
}
}

// Add `loading`, `fetchpriority`, and `decoding` attributes.
$extra_attr = $args['extra_attr'];

if ( in_array( $args['loading'], array( 'lazy', 'eager' ), true )
&& ! preg_match( '/\bloading\s*=/', $extra_attr )
) {
if ( ! empty( $extra_attr ) ) {
$extra_attr .= ' ';
}

$extra_attr .= "loading='{$args['loading']}'";
}

if ( in_array( $args['fetchpriority'], array( 'high', 'low', 'auto' ), true )
&& ! preg_match( '/\bfetchpriority\s*=/', $extra_attr )
) {
if ( ! empty( $extra_attr ) ) {
$extra_attr .= ' ';
}

$extra_attr .= "fetchpriority='{$args['fetchpriority']}'";
}

if ( in_array( $args['decoding'], array( 'async', 'sync', 'auto' ), true )
&& ! preg_match( '/\bdecoding\s*=/', $extra_attr )
) {
if ( ! empty( $extra_attr ) ) {
$extra_attr .= ' ';
}

$extra_attr .= "decoding='{$args['decoding']}'";
}

$avatar = sprintf(
"<img alt='%s' src='%s' srcset='%s' class='%s' height='%d' width='%d' %s/>",
esc_attr( $args['alt'] ),
esc_url( $url ),
esc_url( $url2x ) . ' 2x',
esc_attr( implode( ' ', $class ) ),
(int) $args['height'],
(int) $args['width'],
$extra_attr
);

/**
* Filters the HTML for a user's avatar.
*
* @since 2.5.0
* @since 4.2.0 Added the `$args` parameter.
*
* @param string $avatar HTML for the user's avatar.
* @param mixed $id_or_email The avatar to retrieve. Accepts a user ID, Gravatar MD5 hash,
* user email, WP_User object, WP_Post object, or WP_Comment object.
* @param int $size Height and width of the avatar in pixels.
* @param string $default_value URL for the default image or a default type. Accepts:
* - '404' (return a 404 instead of a default image)
* - 'retro' (a 8-bit arcade-style pixelated face)
* - 'robohash' (a robot)
* - 'monsterid' (a monster)
* - 'wavatar' (a cartoon face)
* - 'identicon' (the "quilt", a geometric pattern)
* - 'mystery', 'mm', or 'mysteryman' (The Oyster Man)
* - 'blank' (transparent GIF)
* - 'gravatar_default' (the Gravatar logo)
* @param string $alt Alternative text to use in the avatar image tag.
* @param array $args Arguments passed to get_avatar_data(), after processing.
*/
return apply_filters( 'get_avatar', $avatar, $id_or_email, $args['size'], $args['default'], $args['alt'], $args );
}
endif;

if ( ! function_exists( 'wp_text_diff' ) ) :
/**
* Displays a human readable HTML representation of the difference between two strings.
*
* The Diff is available for getting the changes between versions. The output is
* HTML, so the primary use is for displaying the changes. If the two strings
* are equivalent, then an empty string will be returned.
*
* @since 2.6.0
*
* @see wp_parse_args() Used to change defaults to user defined settings.
* @uses Text_Diff
* @uses WP_Text_Diff_Renderer_Table
*
* @param string $left_string "old" (left) version of string.
* @param string $right_string "new" (right) version of string.
* @param string|array $args {
* Associative array of options to pass to WP_Text_Diff_Renderer_Table().
*
* @type string $title Titles the diff in a manner compatible
* with the output. Default empty.
* @type string $title_left Change the HTML to the left of the title.
* Default empty.
* @type string $title_right Change the HTML to the right of the title.
* Default empty.
* @type bool $show_split_view True for split view (two columns), false for
* un-split view (single column). Default true.
* }
* @return string Empty string if strings are equivalent or HTML with differences.
*/
function wp_text_diff( $left_string, $right_string, $args = null ) {
$defaults = array(
'title' => '',
'title_left' => '',
'title_right' => '',
'show_split_view' => true,
);
$args = wp_parse_args( $args, $defaults );

if ( ! class_exists( 'WP_Text_Diff_Renderer_Table', false ) ) {
require ABSPATH . WPINC . '/wp-diff.php';
}

$left_string = normalize_whitespace( $left_string );
$right_string = normalize_whitespace( $right_string );

$left_lines = explode( "\n", $left_string );
$right_lines = explode( "\n", $right_string );
$text_diff = new Text_Diff( $left_lines, $right_lines );
$renderer = new WP_Text_Diff_Renderer_Table( $args );
$diff = $renderer->render( $text_diff );

if ( ! $diff ) {
return '';
}

$is_split_view = ! empty( $args['show_split_view'] );
$is_split_view_class = $is_split_view ? ' is-split-view' : '';

$r = "<table class='diff$is_split_view_class'>\n";

if ( $args['title'] ) {
$r .= "<caption class='diff-title'>$args[title]</caption>\n";
}

if ( $args['title_left'] || $args['title_right'] ) {
$r .= '<thead>';
}

if ( $args['title_left'] || $args['title_right'] ) {
$th_or_td_left = empty( $args['title_left'] ) ? 'td' : 'th';
$th_or_td_right = empty( $args['title_right'] ) ? 'td' : 'th';

$r .= "<tr class='diff-sub-title'>\n";
$r .= "\t<$th_or_td_left>$args[title_left]</$th_or_td_left>\n";
if ( $is_split_view ) {
$r .= "\t<$th_or_td_right>$args[title_right]</$th_or_td_right>\n";
}
$r .= "</tr>\n";
}

if ( $args['title_left'] || $args['title_right'] ) {
$r .= "</thead>\n";
}

$r .= "<tbody>\n$diff\n</tbody>\n";
$r .= '</table>';

return $r;
}
endif;