X-Git-Url: https://scripts.mit.edu/gitweb/autoinstalls/wordpress.git/blobdiff_plain/dc1231b7312fbdca99e9e887cc2bb35a28f85cdc..refs/tags/wordpress-4.4:/wp-includes/pluggable.php diff --git a/wp-includes/pluggable.php b/wp-includes/pluggable.php index e41cbfe5..88d14405 100644 --- a/wp-includes/pluggable.php +++ b/wp-includes/pluggable.php @@ -26,8 +26,14 @@ if ( !function_exists('wp_set_current_user') ) : function wp_set_current_user($id, $name = '') { global $current_user; - if ( isset( $current_user ) && ( $current_user instanceof WP_User ) && ( $id == $current_user->ID ) ) + // If `$id` matches the user who's already current, there's 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, $name ); @@ -145,8 +151,9 @@ if ( !function_exists('get_user_by') ) : * Retrieve user info by a given field * * @since 2.8.0 + * @since 4.4.0 Added 'ID' as an alias of 'id' for the `$field` parameter. * - * @param string $field The field to retrieve the user with. id | slug | email | login + * @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. */ @@ -169,7 +176,7 @@ if ( !function_exists('cache_users') ) : * * @since 3.0.0 * - * @global wpdb $wpdb + * @global wpdb $wpdb WordPress database abstraction object. * * @param array $user_ids User ID numbers list */ @@ -502,7 +509,7 @@ function wp_mail( $to, $subject, $message, $headers = '', $attachments = array() // Set custom headers if ( !empty( $headers ) ) { - foreach( (array) $headers as $name => $content ) { + foreach ( (array) $headers as $name => $content ) { $phpmailer->AddCustomHeader( sprintf( '%1$s: %2$s', $name, $content ) ); } @@ -533,6 +540,19 @@ function wp_mail( $to, $subject, $message, $headers = '', $attachments = array() try { return $phpmailer->Send(); } catch ( phpmailerException $e ) { + + $mail_error_data = compact( $to, $subject, $message, $headers, $attachments ); + + /** + * Fires after a phpmailerException is caught. + * + * @since 4.4.0 + * + * @param WP_Error $error A WP_Error object with the phpmailerException code, message, and an array + * containing the mail recipient, subject, message, headers, and attachments. + */ + do_action( 'wp_mail_failed', new WP_Error( $e->getCode(), $e->getMessage(), $mail_error_data ) ); + return false; } } @@ -1139,13 +1159,6 @@ function check_ajax_referer( $action = -1, $query_arg = false, $die = true ) { $result = wp_verify_nonce( $nonce, $action ); - if ( $die && false === $result ) { - if ( defined( 'DOING_AJAX' ) && DOING_AJAX ) - wp_die( -1 ); - else - die( '-1' ); - } - /** * Fires once the AJAX request has been validated or not. * @@ -1157,6 +1170,14 @@ function check_ajax_referer( $action = -1, $query_arg = false, $die = true ) { */ do_action( 'check_ajax_referer', $action, $result ); + if ( $die && false === $result ) { + if ( defined( 'DOING_AJAX' ) && DOING_AJAX ) { + wp_die( -1 ); + } else { + die( '-1' ); + } + } + return $result; } endif; @@ -1232,7 +1253,7 @@ function wp_sanitize_redirect($location) { ){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 = preg_replace('|[^a-z0-9-~+_.?#=&;,/:%!*\[\]()@]|i', '', $location); $location = wp_kses_no_null($location); // remove %0d and %0a from location @@ -1351,8 +1372,8 @@ if ( ! function_exists('wp_notify_postauthor') ) : * * @since 1.0.0 * - * @param int $comment_id Comment ID - * @param string $deprecated Not used + * @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 ) { @@ -1361,7 +1382,7 @@ function wp_notify_postauthor( $comment_id, $deprecated = null ) { } $comment = get_comment( $comment_id ); - if ( empty( $comment ) ) + if ( empty( $comment ) || empty( $comment->comment_post_ID ) ) return false; $post = get_post( $comment->comment_post_ID ); @@ -1384,7 +1405,7 @@ function wp_notify_postauthor( $comment_id, $deprecated = null ) { * @param array $emails An array of email addresses to receive a comment notification. * @param int $comment_id The comment ID. */ - $emails = apply_filters( 'comment_notification_recipients', $emails, $comment_id ); + $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. @@ -1407,7 +1428,7 @@ function wp_notify_postauthor( $comment_id, $deprecated = null ) { * Default false. * @param int $comment_id The comment ID. */ - $notify_author = apply_filters( 'comment_notification_notify_author', false, $comment_id ); + $notify_author = apply_filters( 'comment_notification_notify_author', false, $comment->comment_ID ); // The comment was left by the author if ( $author && ! $notify_author && $comment->user_id == $post->post_author ) { @@ -1436,6 +1457,7 @@ function wp_notify_postauthor( $comment_id, $deprecated = null ) { // 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 ); switch ( $comment->comment_type ) { case 'trackback': @@ -1443,7 +1465,7 @@ function wp_notify_postauthor( $comment_id, $deprecated = null ) { /* translators: 1: website name, 2: website IP, 3: website hostname */ $notify_message .= sprintf( __('Website: %1$s (IP: %2$s, %3$s)'), $comment->comment_author, $comment->comment_author_IP, $comment_author_domain ) . "\r\n"; $notify_message .= sprintf( __( 'URL: %s' ), $comment->comment_author_url ) . "\r\n"; - $notify_message .= sprintf( __( 'Comment: %s' ), "\r\n" . $comment->comment_content ) . "\r\n\r\n"; + $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: 1: blog name, 2: post title */ $subject = sprintf( __('[%1$s] Trackback: "%2$s"'), $blogname, $post->post_title ); @@ -1453,7 +1475,7 @@ function wp_notify_postauthor( $comment_id, $deprecated = null ) { /* translators: 1: website name, 2: website IP, 3: website hostname */ $notify_message .= sprintf( __('Website: %1$s (IP: %2$s, %3$s)'), $comment->comment_author, $comment->comment_author_IP, $comment_author_domain ) . "\r\n"; $notify_message .= sprintf( __( 'URL: %s' ), $comment->comment_author_url ) . "\r\n"; - $notify_message .= sprintf( __( 'Comment: %s' ), "\r\n" . $comment->comment_content ) . "\r\n\r\n"; + $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: 1: blog name, 2: post title */ $subject = sprintf( __('[%1$s] Pingback: "%2$s"'), $blogname, $post->post_title ); @@ -1462,23 +1484,24 @@ function wp_notify_postauthor( $comment_id, $deprecated = null ) { $notify_message = sprintf( __( 'New comment on your post "%s"' ), $post->post_title ) . "\r\n"; /* translators: 1: comment author, 2: author IP, 3: author domain */ $notify_message .= sprintf( __( 'Author: %1$s (IP: %2$s, %3$s)' ), $comment->comment_author, $comment->comment_author_IP, $comment_author_domain ) . "\r\n"; - $notify_message .= sprintf( __( 'E-mail: %s' ), $comment->comment_author_email ) . "\r\n"; + $notify_message .= sprintf( __( 'Email: %s' ), $comment->comment_author_email ) . "\r\n"; $notify_message .= sprintf( __( 'URL: %s' ), $comment->comment_author_url ) . "\r\n"; - $notify_message .= sprintf( __('Comment: %s' ), "\r\n" . $comment->comment_content ) . "\r\n\r\n"; + $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: 1: blog name, 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"; - $notify_message .= sprintf( __('Permalink: %s'), get_comment_link( $comment_id ) ) . "\r\n"; + $notify_message .= sprintf( __('Permalink: %s'), get_comment_link( $comment ) ) . "\r\n"; - if ( user_can( $post->post_author, 'edit_comment', $comment_id ) ) { - if ( EMPTY_TRASH_DAYS ) - $notify_message .= sprintf( __('Trash it: %s'), admin_url("comment.php?action=trash&c=$comment_id") ) . "\r\n"; - else - $notify_message .= sprintf( __('Delete it: %s'), admin_url("comment.php?action=delete&c=$comment_id") ) . "\r\n"; - $notify_message .= sprintf( __('Spam it: %s'), admin_url("comment.php?action=spam&c=$comment_id") ) . "\r\n"; + if ( user_can( $post->post_author, 'edit_comment', $comment->comment_ID ) ) { + if ( EMPTY_TRASH_DAYS ) { + $notify_message .= sprintf( __('Trash it: %s'), admin_url("comment.php?action=trash&c={$comment->comment_ID}") ) . "\r\n"; + } else { + $notify_message .= sprintf( __('Delete it: %s'), admin_url("comment.php?action=delete&c={$comment->comment_ID}") ) . "\r\n"; + } + $notify_message .= sprintf( __('Spam it: %s'), admin_url("comment.php?action=spam&c={$comment->comment_ID}") ) . "\r\n"; } $wp_email = 'wordpress@' . preg_replace('#^www\.#', '', strtolower($_SERVER['SERVER_NAME'])); @@ -1507,7 +1530,7 @@ function wp_notify_postauthor( $comment_id, $deprecated = null ) { * @param string $notify_message The comment notification email text. * @param int $comment_id Comment ID. */ - $notify_message = apply_filters( 'comment_notification_text', $notify_message, $comment_id ); + $notify_message = apply_filters( 'comment_notification_text', $notify_message, $comment->comment_ID ); /** * Filter the comment notification email subject. @@ -1517,7 +1540,7 @@ function wp_notify_postauthor( $comment_id, $deprecated = null ) { * @param string $subject The comment notification email subject. * @param int $comment_id Comment ID. */ - $subject = apply_filters( 'comment_notification_subject', $subject, $comment_id ); + $subject = apply_filters( 'comment_notification_subject', $subject, $comment->comment_ID ); /** * Filter the comment notification email headers. @@ -1527,7 +1550,7 @@ function wp_notify_postauthor( $comment_id, $deprecated = null ) { * @param string $message_headers Headers for the comment notification email. * @param int $comment_id Comment ID. */ - $message_headers = apply_filters( 'comment_notification_headers', $message_headers, $comment_id ); + $message_headers = apply_filters( 'comment_notification_headers', $message_headers, $comment->comment_ID ); foreach ( $emails as $email ) { @wp_mail( $email, wp_specialchars_decode( $subject ), $notify_message, $message_headers ); @@ -1539,20 +1562,36 @@ endif; if ( !function_exists('wp_notify_moderator') ) : /** - * Notifies the moderator of the blog about a new comment that is awaiting approval. + * 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. * - * @param int $comment_id Comment ID - * @return true Always returns true + * 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; - if ( 0 == get_option( 'moderation_notify' ) ) + $maybe_notify = get_option( 'moderation_notify' ); + + /** + * Filter 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); @@ -1570,6 +1609,7 @@ function wp_notify_moderator($comment_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); + $comment_content = wp_specialchars_decode( $comment->comment_content ); switch ( $comment->comment_type ) { case 'trackback': @@ -1578,7 +1618,7 @@ function wp_notify_moderator($comment_id) { /* translators: 1: website name, 2: website IP, 3: website hostname */ $notify_message .= sprintf( __( 'Website: %1$s (IP: %2$s, %3$s)' ), $comment->comment_author, $comment->comment_author_IP, $comment_author_domain ) . "\r\n"; $notify_message .= sprintf( __( 'URL: %s' ), $comment->comment_author_url ) . "\r\n"; - $notify_message .= __('Trackback excerpt: ') . "\r\n" . $comment->comment_content . "\r\n\r\n"; + $notify_message .= __('Trackback excerpt: ') . "\r\n" . $comment_content . "\r\n\r\n"; break; case 'pingback': $notify_message = sprintf( __('A new pingback on the post "%s" is waiting for your approval'), $post->post_title ) . "\r\n"; @@ -1586,15 +1626,15 @@ function wp_notify_moderator($comment_id) { /* translators: 1: website name, 2: website IP, 3: website hostname */ $notify_message .= sprintf( __( 'Website: %1$s (IP: %2$s, %3$s)' ), $comment->comment_author, $comment->comment_author_IP, $comment_author_domain ) . "\r\n"; $notify_message .= sprintf( __( 'URL: %s' ), $comment->comment_author_url ) . "\r\n"; - $notify_message .= __('Pingback excerpt: ') . "\r\n" . $comment->comment_content . "\r\n\r\n"; + $notify_message .= __('Pingback excerpt: ') . "\r\n" . $comment_content . "\r\n\r\n"; break; default: // Comments $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"; $notify_message .= sprintf( __( 'Author: %1$s (IP: %2$s, %3$s)' ), $comment->comment_author, $comment->comment_author_IP, $comment_author_domain ) . "\r\n"; - $notify_message .= sprintf( __( 'E-mail: %s' ), $comment->comment_author_email ) . "\r\n"; + $notify_message .= sprintf( __( 'Email: %s' ), $comment->comment_author_email ) . "\r\n"; $notify_message .= sprintf( __( 'URL: %s' ), $comment->comment_author_url ) . "\r\n"; - $notify_message .= sprintf( __( 'Comment: %s' ), "\r\n" . $comment->comment_content ) . "\r\n\r\n"; + $notify_message .= sprintf( __( 'Comment: %s' ), "\r\n" . $comment_content ) . "\r\n\r\n"; break; } @@ -1666,9 +1706,9 @@ if ( !function_exists('wp_password_change_notification') ) : * * @since 2.7.0 * - * @param object $user User Object + * @param WP_User $user User object. */ -function wp_password_change_notification(&$user) { +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' ) ) ) { @@ -1697,8 +1737,7 @@ if ( !function_exists('wp_new_user_notification') ) : * @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), or 'both' (admin and user). The empty string value was kept - * for backward-compatibility purposes with the renamed parameter. Default empty. + * string (admin only), or 'both' (admin and user). Default empty. */ function wp_new_user_notification( $user_id, $deprecated = null, $notify = '' ) { if ( $deprecated !== null ) { @@ -1714,11 +1753,12 @@ function wp_new_user_notification( $user_id, $deprecated = null, $notify = '' ) $message = sprintf(__('New user registration on your site %s:'), $blogname) . "\r\n\r\n"; $message .= sprintf(__('Username: %s'), $user->user_login) . "\r\n\r\n"; - $message .= sprintf(__('E-mail: %s'), $user->user_email) . "\r\n"; + $message .= sprintf(__('Email: %s'), $user->user_email) . "\r\n"; @wp_mail(get_option('admin_email'), sprintf(__('[%s] New User Registration'), $blogname), $message); - if ( 'admin' === $notify || empty( $notify ) ) { + // `$deprecated was pre-4.3 `$plaintext_pass`. An empty `$plaintext_pass` didn't sent a user notifcation. + if ( 'admin' === $notify || ( empty( $deprecated ) && empty( $notify ) ) ) { return; } @@ -1820,6 +1860,18 @@ function wp_verify_nonce( $nonce, $action = -1 ) { 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; } @@ -1827,9 +1879,11 @@ endif; if ( !function_exists('wp_create_nonce') ) : /** - * Creates a cryptographic token tied to a specific action, user, and window of time. + * 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. @@ -2102,9 +2156,11 @@ if ( !function_exists('wp_rand') ) : * Generates a random number * * @since 2.6.2 + * @since 4.4.0 Uses PHP7 random_int() or the random_compat library if available. * * @global string $rnd_value * @staticvar string $seed + * @staticvar bool $external_rand_source_available * * @param int $min Lower limit for the generated number * @param int $max Upper limit for the generated number @@ -2113,6 +2169,34 @@ if ( !function_exists('wp_rand') ) : function wp_rand( $min = 0, $max = 0 ) { global $rnd_value; + // Some misconfigured 32bit 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 + + // 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 { + $_max = ( 0 != $max ) ? $max : $max_random_number; + // wp_rand() can accept arguements 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 ) { @@ -2137,9 +2221,6 @@ function wp_rand( $min = 0, $max = 0 ) { $value = abs(hexdec($value)); - // Some misconfigured 32bit 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 - // Reduce the value to be within the min - max range if ( $max != 0 ) $value = $min + ( $max - $min + 1 ) * $value / ( $max_random_number + 1 ); @@ -2184,12 +2265,12 @@ if ( !function_exists( 'get_avatar' ) ) : * @since 4.2.0 Optional `$args` parameter added. * * @param mixed $id_or_email The Gravatar to retrieve. Accepts a user_id, gravatar md5 hash, - * user email, WP_User object, WP_Post object, or comment object. + * user email, WP_User object, WP_Post object, or WP_Comment object. * @param int $size Optional. Height and width of the avatar image file in pixels. Default 96. * @param string $default Optional. URL for the default image or a default type. Accepts '404' * (return a 404 instead of a default image), 'retro' (8bit), 'monsterid' * (monster), 'wavatar' (cartoon face), 'indenticon' (the "quilt"), - * 'mystery', 'mm', or 'mysterman' (The Oyster Man), 'blank' (transparent GIF), + * 'mystery', 'mm', or 'mysteryman' (The Oyster Man), 'blank' (transparent GIF), * or '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 <img> tag. Default empty. @@ -2244,6 +2325,10 @@ function get_avatar( $id_or_email, $size = 96, $default = '', $alt = '', $args = $args['width'] = $args['size']; } + if ( is_object( $id_or_email ) && isset( $id_or_email->comment_ID ) ) { + $id_or_email = get_comment( $id_or_email ); + } + /** * Filter whether to retrieve the avatar URL early. * @@ -2252,9 +2337,10 @@ function get_avatar( $id_or_email, $size = 96, $default = '', $alt = '', $args = * * @since 4.2.0 * - * @param string $avatar HTML for the user's avatar. Default null. - * @param int|object|string $id_or_email A user ID, email address, or comment object. - * @param array $args Arguments passed to get_avatar_url(), after processing. + * @param string $avatar HTML for the user's avatar. Default null. + * @param mixed $id_or_email The Gravatar 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 ); @@ -2308,12 +2394,13 @@ function get_avatar( $id_or_email, $size = 96, $default = '', $alt = '', $args = * @since 2.5.0 * @since 4.2.0 The `$args` parameter was added. * - * @param string $avatar <img> tag for the user's avatar. - * @param int|object|string $id_or_email A user ID, email address, or comment object. - * @param int $size Square avatar width and height in pixels to retrieve. - * @param string $alt Alternative text to use in the avatar image tag. + * @param string $avatar <img> tag for the user's avatar. + * @param mixed $id_or_email The Gravatar to retrieve. Accepts a user_id, gravatar md5 hash, + * user email, WP_User object, WP_Post object, or WP_Comment object. + * @param int $size Square avatar width and height in pixels to retrieve. + * @param string $alt Alternative text to use in the avatar image tag. * Default empty. - * @param array $args Arguments passed to get_avatar_data(), after processing. + * @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 ); } @@ -2351,7 +2438,7 @@ function wp_text_diff( $left_string, $right_string, $args = null ) { $defaults = array( 'title' => '', 'title_left' => '', 'title_right' => '' ); $args = wp_parse_args( $args, $defaults ); - if ( !class_exists( 'WP_Text_Diff_Renderer_Table' ) ) + if ( ! class_exists( 'WP_Text_Diff_Renderer_Table', false ) ) require( ABSPATH . WPINC . '/wp-diff.php' ); $left_string = normalize_whitespace($left_string);