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comment.php
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<?php
/**
* Core Comment API
*
* @package WordPress
* @subpackage Comment
*/
/**
* Checks whether a comment passes internal checks to be allowed to add.
*
* If manual comment moderation is set in the administration, then all checks,
* regardless of their type and substance, will fail and the function will
* return false.
*
* If the number of links exceeds the amount in the administration, then the
* check fails. If any of the parameter contents contain any disallowed words,
* then the check fails.
*
* If the comment author was approved before, then the comment is automatically
* approved.
*
* If all checks pass, the function will return true.
*
* @since 1.2.0
*
* @global wpdb $wpdb WordPress database abstraction object.
*
* @param string $author Comment author name.
* @param string $email Comment author email.
* @param string $url Comment author URL.
* @param string $comment Content of the comment.
* @param string $user_ip Comment author IP address.
* @param string $user_agent Comment author User-Agent.
* @param string $comment_type Comment type, either user-submitted comment,
* trackback, or pingback.
* @return bool If all checks pass, true, otherwise false.
*/
function check_comment( $author, $email, $url, $comment, $user_ip, $user_agent, $comment_type ) {
global $wpdb;
// If manual moderation is enabled, skip all checks and return false.
if ( '1' === get_option( 'comment_moderation' ) ) {
return false;
}
/** This filter is documented in wp-includes/comment-template.php */
$comment = apply_filters( 'comment_text', $comment, null, array() );
// Check for the number of external links if a max allowed number is set.
$max_links = get_option( 'comment_max_links' );
if ( $max_links ) {
$num_links = preg_match_all( '/<a [^>]*href/i', $comment, $out );
/**
* Filters the number of links found in a comment.
*
* @since 3.0.0
* @since 4.7.0 Added the `$comment` parameter.
*
* @param int $num_links The number of links found.
* @param string $url Comment author's URL. Included in allowed links total.
* @param string $comment Content of the comment.
*/
$num_links = apply_filters( 'comment_max_links_url', $num_links, $url, $comment );
/*
* If the number of links in the comment exceeds the allowed amount,
* fail the check by returning false.
*/
if ( $num_links >= $max_links ) {
return false;
}
}
$mod_keys = trim( get_option( 'moderation_keys' ) );
// If moderation 'keys' (keywords) are set, process them.
if ( ! empty( $mod_keys ) ) {
$words = explode( "\n", $mod_keys );
foreach ( (array) $words as $word ) {
$word = trim( $word );
// Skip empty lines.
if ( empty( $word ) ) {
continue;
}
/*
* Do some escaping magic so that '#' (number of) characters in the spam
* words don't break things:
*/
$word = preg_quote( $word, '#' );
/*
* Check the comment fields for moderation keywords. If any are found,
* fail the check for the given field by returning false.
*/
$pattern = "#$word#iu";
if ( preg_match( $pattern, $author ) ) {
return false;
}
if ( preg_match( $pattern, $email ) ) {
return false;
}
if ( preg_match( $pattern, $url ) ) {
return false;
}
if ( preg_match( $pattern, $comment ) ) {
return false;
}
if ( preg_match( $pattern, $user_ip ) ) {
return false;
}
if ( preg_match( $pattern, $user_agent ) ) {
return false;
}
}
}
/*
* Check if the option to approve comments by previously-approved authors is enabled.
*
* If it is enabled, check whether the comment author has a previously-approved comment,
* as well as whether there are any moderation keywords (if set) present in the author
* email address. If both checks pass, return true. Otherwise, return false.
*/
if ( '1' === get_option( 'comment_previously_approved' ) ) {
if ( 'trackback' !== $comment_type && 'pingback' !== $comment_type && '' !== $author && '' !== $email ) {
$comment_user = get_user_by( 'email', wp_unslash( $email ) );
if ( ! empty( $comment_user->ID ) ) {
$ok_to_comment = $wpdb->get_var(
$wpdb->prepare(
"SELECT comment_approved
FROM $wpdb->comments
WHERE user_id = %d
AND comment_approved = '1'
LIMIT 1",
$comment_user->ID
)
);
} else {
// expected_slashed ($author, $email)
$ok_to_comment = $wpdb->get_var(
$wpdb->prepare(
"SELECT comment_approved
FROM $wpdb->comments
WHERE comment_author = %s
AND comment_author_email = %s
AND comment_approved = '1'
LIMIT 1",
$author,
$email
)
);
}
if ( '1' === $ok_to_comment && ( empty( $mod_keys ) || ! str_contains( $email, $mod_keys ) ) ) {
return true;
} else {
return false;
}
} else {
return false;
}
}
return true;
}
/**
* Retrieves the approved comments for a post.
*
* @since 2.0.0
* @since 4.1.0 Refactored to leverage WP_Comment_Query over a direct query.
*
* @param int $post_id The ID of the post.
* @param array $args {
* Optional. See WP_Comment_Query::__construct() for information on accepted arguments.
*
* @type int $status Comment status to limit results by. Defaults to approved comments.
* @type int $post_id Limit results to those affiliated with a given post ID.
* @type string $order How to order retrieved comments. Default 'ASC'.
* }
* @return WP_Comment[]|int[]|int The approved comments, or number of comments if `$count`
* argument is true.
*/
function get_approved_comments( $post_id, $args = array() ) {
if ( ! $post_id ) {
return array();
}
$defaults = array(
'status' => 1,
'post_id' => $post_id,
'order' => 'ASC',
);
$parsed_args = wp_parse_args( $args, $defaults );
$query = new WP_Comment_Query();
return $query->query( $parsed_args );
}
/**
* Retrieves comment data given a comment ID or comment object.
*
* If an object is passed then the comment data will be cached and then returned
* after being passed through a filter. If the comment is empty, then the global
* comment variable will be used, if it is set.
*
* @since 2.0.0
*
* @global WP_Comment $comment Global comment object.
*
* @param WP_Comment|string|int $comment Comment to retrieve.
* @param string $output Optional. The required return type. One of OBJECT, ARRAY_A, or ARRAY_N, which
* correspond to a WP_Comment object, an associative array, or a numeric array,
* respectively. Default OBJECT.
* @return WP_Comment|array|null Depends on $output value.
*/
function get_comment( $comment = null, $output = OBJECT ) {
if ( empty( $comment ) && isset( $GLOBALS['comment'] ) ) {
$comment = $GLOBALS['comment'];
}
if ( $comment instanceof WP_Comment ) {
$_comment = $comment;
} elseif ( is_object( $comment ) ) {
$_comment = new WP_Comment( $comment );
} else {
$_comment = WP_Comment::get_instance( $comment );
}
if ( ! $_comment ) {
return null;
}
/**
* Fires after a comment is retrieved.
*
* @since 2.3.0
*
* @param WP_Comment $_comment Comment data.
*/
$_comment = apply_filters( 'get_comment', $_comment );
if ( OBJECT === $output ) {
return $_comment;
} elseif ( ARRAY_A === $output ) {
return $_comment->to_array();
} elseif ( ARRAY_N === $output ) {
return array_values( $_comment->to_array() );
}
return $_comment;
}
/**
* Retrieves a list of comments.
*
* The comment list can be for the blog as a whole or for an individual post.
*
* @since 2.7.0
*
* @param string|array $args Optional. Array or string of arguments. See WP_Comment_Query::__construct()
* for information on accepted arguments. Default empty string.
* @return WP_Comment[]|int[]|int List of comments or number of found comments if `$count` argument is true.
*/
function get_comments( $args = '' ) {
$query = new WP_Comment_Query();
return $query->query( $args );
}
/**
* Retrieves all of the WordPress supported comment statuses.
*
* Comments have a limited set of valid status values, this provides the comment
* status values and descriptions.
*
* @since 2.7.0
*
* @return string[] List of comment status labels keyed by status.
*/
function get_comment_statuses() {
$status = array(
'hold' => __( 'Unapproved' ),
'approve' => _x( 'Approved', 'comment status' ),
'spam' => _x( 'Spam', 'comment status' ),
'trash' => _x( 'Trash', 'comment status' ),
);
return $status;
}
/**
* Gets the default comment status for a post type.
*
* @since 4.3.0
*
* @param string $post_type Optional. Post type. Default 'post'.
* @param string $comment_type Optional. Comment type. Default 'comment'.
* @return string Either 'open' or 'closed'.
*/
function get_default_comment_status( $post_type = 'post', $comment_type = 'comment' ) {
switch ( $comment_type ) {
case 'pingback':
case 'trackback':
$supports = 'trackbacks';
$option = 'ping';
break;
default:
$supports = 'comments';
$option = 'comment';
break;
}
// Set the status.
if ( 'page' === $post_type ) {
$status = 'closed';
} elseif ( post_type_supports( $post_type, $supports ) ) {
$status = get_option( "default_{$option}_status" );
} else {
$status = 'closed';
}
/**
* Filters the default comment status for the given post type.
*
* @since 4.3.0
*
* @param string $status Default status for the given post type,
* either 'open' or 'closed'.
* @param string $post_type Post type. Default is `post`.
* @param string $comment_type Type of comment. Default is `comment`.
*/
return apply_filters( 'get_default_comment_status', $status, $post_type, $comment_type );
}
/**
* Retrieves the date the last comment was modified.
*
* @since 1.5.0
* @since 4.7.0 Replaced caching the modified date in a local static variable
* with the Object Cache API.
*
* @global wpdb $wpdb WordPress database abstraction object.
*
* @param string $timezone Which timezone to use in reference to 'gmt', 'blog', or 'server' locations.
* @return string|false Last comment modified date on success, false on failure.
*/
function get_lastcommentmodified( $timezone = 'server' ) {
global $wpdb;
$timezone = strtolower( $timezone );
$key = "lastcommentmodified:$timezone";
$comment_modified_date = wp_cache_get( $key, 'timeinfo' );
if ( false !== $comment_modified_date ) {
return $comment_modified_date;
}
switch ( $timezone ) {
case 'gmt':
$comment_modified_date = $wpdb->get_var( "SELECT comment_date_gmt FROM $wpdb->comments WHERE comment_approved = '1' ORDER BY comment_date_gmt DESC LIMIT 1" );
break;
case 'blog':
$comment_modified_date = $wpdb->get_var( "SELECT comment_date FROM $wpdb->comments WHERE comment_approved = '1' ORDER BY comment_date_gmt DESC LIMIT 1" );
break;
case 'server':
$add_seconds_server = gmdate( 'Z' );
$comment_modified_date = $wpdb->get_var( $wpdb->prepare( "SELECT DATE_ADD(comment_date_gmt, INTERVAL %s SECOND) FROM $wpdb->comments WHERE comment_approved = '1' ORDER BY comment_date_gmt DESC LIMIT 1", $add_seconds_server ) );
break;
}
if ( $comment_modified_date ) {
wp_cache_set( $key, $comment_modified_date, 'timeinfo' );
return $comment_modified_date;
}
return false;
}
/**
* Retrieves the total comment counts for the whole site or a single post.
*
* @since 2.0.0
*
* @param int $post_id Optional. Restrict the comment counts to the given post. Default 0, which indicates that
* comment counts for the whole site will be retrieved.
* @return int[] {
* The number of comments keyed by their status.
*
* @type int $approved The number of approved comments.
* @type int $awaiting_moderation The number of comments awaiting moderation (a.k.a. pending).
* @type int $spam The number of spam comments.
* @type int $trash The number of trashed comments.
* @type int $post-trashed The number of comments for posts that are in the trash.
* @type int $total_comments The total number of non-trashed comments, including spam.
* @type int $all The total number of pending or approved comments.
* }
*/
function get_comment_count( $post_id = 0 ) {
$post_id = (int) $post_id;
$comment_count = array(
'approved' => 0,
'awaiting_moderation' => 0,
'spam' => 0,
'trash' => 0,
'post-trashed' => 0,
'total_comments' => 0,
'all' => 0,
);
$args = array(
'count' => true,
'update_comment_meta_cache' => false,
'orderby' => 'none',
);
if ( $post_id > 0 ) {
$args['post_id'] = $post_id;
}
$mapping = array(
'approved' => 'approve',
'awaiting_moderation' => 'hold',
'spam' => 'spam',
'trash' => 'trash',
'post-trashed' => 'post-trashed',
);
$comment_count = array();
foreach ( $mapping as $key => $value ) {
$comment_count[ $key ] = get_comments( array_merge( $args, array( 'status' => $value ) ) );
}
$comment_count['all'] = $comment_count['approved'] + $comment_count['awaiting_moderation'];
$comment_count['total_comments'] = $comment_count['all'] + $comment_count['spam'];
return array_map( 'intval', $comment_count );
}
//
// Comment meta functions.
//
/**
* Adds meta data field to a comment.
*
* For historical reasons both the meta key and the meta value are expected to be "slashed" (slashes escaped) on input.
*
* @since 2.9.0
*
* @link https://developer.wordpress.org/reference/functions/add_comment_meta/
*
* @param int $comment_id Comment ID.
* @param string $meta_key Metadata name.
* @param mixed $meta_value Metadata value. Arrays and objects are stored as serialized data and
* will be returned as the same type when retrieved. Other data types will
* be stored as strings in the database:
* - false is stored and retrieved as an empty string ('')
* - true is stored and retrieved as '1'
* - numbers (both integer and float) are stored and retrieved as strings
* Must be serializable if non-scalar.
* @param bool $unique Optional. Whether the same key should not be added.
* Default false.
* @return int|false Meta ID on success, false on failure.
*/
function add_comment_meta( $comment_id, $meta_key, $meta_value, $unique = false ) {
return add_metadata( 'comment', $comment_id, $meta_key, $meta_value, $unique );
}
/**
* Removes metadata matching criteria from a comment.
*
* You can match based on the key, or key and value. Removing based on key and
* value, will keep from removing duplicate metadata with the same key. It also
* allows removing all metadata matching key, if needed.
*
* For historical reasons both the meta key and the meta value are expected to be "slashed" (slashes escaped) on input.
*
* @since 2.9.0
*
* @link https://developer.wordpress.org/reference/functions/delete_comment_meta/
*
* @param int $comment_id Comment ID.
* @param string $meta_key Metadata name.
* @param mixed $meta_value Optional. Metadata value. If provided,
* rows will only be removed that match the value.
* Must be serializable if non-scalar. Default empty string.
* @return bool True on success, false on failure.
*/
function delete_comment_meta( $comment_id, $meta_key, $meta_value = '' ) {
return delete_metadata( 'comment', $comment_id, $meta_key, $meta_value );
}
/**
* Retrieves comment meta field for a comment.
*
* @since 2.9.0
*
* @link https://developer.wordpress.org/reference/functions/get_comment_meta/
*
* @param int $comment_id Comment ID.
* @param string $key Optional. The meta key to retrieve. By default,
* returns data for all keys. Default empty string.
* @param bool $single Optional. Whether to return a single value.
* This parameter has no effect if `$key` is not specified.
* Default false.
* @return mixed An array of values if `$single` is false.
* The value of meta data field if `$single` is true.
* False for an invalid `$comment_id` (non-numeric, zero, or negative value).
* An empty array if a valid but non-existing comment ID is passed and `$single` is false.
* An empty string if a valid but non-existing comment ID is passed and `$single` is true.
* Note: Non-serialized values are returned as strings:
* - false values are returned as empty strings ('')
* - true values are returned as '1'
* - numbers are returned as strings
* Arrays and objects retain their original type.
*/
function get_comment_meta( $comment_id, $key = '', $single = false ) {
return get_metadata( 'comment', $comment_id, $key, $single );
}
/**
* Queue comment meta for lazy-loading.
*
* @since 6.3.0
*
* @param array $comment_ids List of comment IDs.
*/
function wp_lazyload_comment_meta( array $comment_ids ) {
if ( empty( $comment_ids ) ) {
return;
}
$lazyloader = wp_metadata_lazyloader();
$lazyloader->queue_objects( 'comment', $comment_ids );
}
/**
* Updates comment meta field based on comment ID.
*
* Use the $prev_value parameter to differentiate between meta fields with the
* same key and comment ID.
*
* If the meta field for the comment does not exist, it will be added.
*
* For historical reasons both the meta key and the meta value are expected to be "slashed" (slashes escaped) on input.
*
* @since 2.9.0
*
* @link https://developer.wordpress.org/reference/functions/update_comment_meta/
*
* @param int $comment_id Comment ID.
* @param string $meta_key Metadata key.
* @param mixed $meta_value Metadata value. Must be serializable if non-scalar.
* @param mixed $prev_value Optional. Previous value to check before updating.
* If specified, only update existing metadata entries with
* this value. Otherwise, update all entries. Default empty string.
* @return int|bool Meta ID if the key didn't exist, true on successful update,
* false on failure or if the value passed to the function
* is the same as the one that is already in the database.
*/
function update_comment_meta( $comment_id, $meta_key, $meta_value, $prev_value = '' ) {
return update_metadata( 'comment', $comment_id, $meta_key, $meta_value, $prev_value );
}
/**
* Sets the cookies used to store an unauthenticated commentator's identity. Typically used
* to recall previous comments by this commentator that are still held in moderation.
*
* @since 3.4.0
* @since 4.9.6 The `$cookies_consent` parameter was added.
*
* @param WP_Comment $comment Comment object.
* @param WP_User $user Comment author's user object. The user may not exist.
* @param bool $cookies_consent Optional. Comment author's consent to store cookies. Default true.
*/
function wp_set_comment_cookies( $comment, $user, $cookies_consent = true ) {
// If the user already exists, or the user opted out of cookies, don't set cookies.
if ( $user->exists() ) {
return;
}
if ( false === $cookies_consent ) {
// Remove any existing cookies.
$past = time() - YEAR_IN_SECONDS;
setcookie( 'comment_author_' . COOKIEHASH, ' ', $past, COOKIEPATH, COOKIE_DOMAIN );
setcookie( 'comment_author_email_' . COOKIEHASH, ' ', $past, COOKIEPATH, COOKIE_DOMAIN );
setcookie( 'comment_author_url_' . COOKIEHASH, ' ', $past, COOKIEPATH, COOKIE_DOMAIN );
return;
}
/**
* Filters the lifetime of the comment cookie in seconds.
*
* @since 2.8.0
* @since 6.6.0 The default $seconds value changed from 30000000 to YEAR_IN_SECONDS.
*
* @param int $seconds Comment cookie lifetime. Default YEAR_IN_SECONDS.
*/
$comment_cookie_lifetime = time() + apply_filters( 'comment_cookie_lifetime', YEAR_IN_SECONDS );
$secure = ( 'https' === parse_url( home_url(), PHP_URL_SCHEME ) );
setcookie( 'comment_author_' . COOKIEHASH, $comment->comment_author, $comment_cookie_lifetime, COOKIEPATH, COOKIE_DOMAIN, $secure );
setcookie( 'comment_author_email_' . COOKIEHASH, $comment->comment_author_email, $comment_cookie_lifetime, COOKIEPATH, COOKIE_DOMAIN, $secure );
setcookie( 'comment_author_url_' . COOKIEHASH, esc_url( $comment->comment_author_url ), $comment_cookie_lifetime, COOKIEPATH, COOKIE_DOMAIN, $secure );
}
/**
* Sanitizes the cookies sent to the user already.
*
* Will only do anything if the cookies have already been created for the user.
* Mostly used after cookies had been sent to use elsewhere.
*
* @since 2.0.4
*/
function sanitize_comment_cookies() {
if ( isset( $_COOKIE[ 'comment_author_' . COOKIEHASH ] ) ) {
/**
* Filters the comment author's name cookie before it is set.
*
* When this filter hook is evaluated in wp_filter_comment(),
* the comment author's name string is passed.
*
* @since 1.5.0
*
* @param string $author_cookie The comment author name cookie.
*/
$comment_author = apply_filters( 'pre_comment_author_name', $_COOKIE[ 'comment_author_' . COOKIEHASH ] );
$comment_author = wp_unslash( $comment_author );
$comment_author = esc_attr( $comment_author );
$_COOKIE[ 'comment_author_' . COOKIEHASH ] = $comment_author;
}
if ( isset( $_COOKIE[ 'comment_author_email_' . COOKIEHASH ] ) ) {
/**
* Filters the comment author's email cookie before it is set.
*
* When this filter hook is evaluated in wp_filter_comment(),
* the comment author's email string is passed.
*
* @since 1.5.0
*
* @param string $author_email_cookie The comment author email cookie.
*/
$comment_author_email = apply_filters( 'pre_comment_author_email', $_COOKIE[ 'comment_author_email_' . COOKIEHASH ] );
$comment_author_email = wp_unslash( $comment_author_email );
$comment_author_email = esc_attr( $comment_author_email );
$_COOKIE[ 'comment_author_email_' . COOKIEHASH ] = $comment_author_email;
}
if ( isset( $_COOKIE[ 'comment_author_url_' . COOKIEHASH ] ) ) {
/**
* Filters the comment author's URL cookie before it is set.
*
* When this filter hook is evaluated in wp_filter_comment(),
* the comment author's URL string is passed.
*
* @since 1.5.0
*
* @param string $author_url_cookie The comment author URL cookie.
*/
$comment_author_url = apply_filters( 'pre_comment_author_url', $_COOKIE[ 'comment_author_url_' . COOKIEHASH ] );
$comment_author_url = wp_unslash( $comment_author_url );
$_COOKIE[ 'comment_author_url_' . COOKIEHASH ] = $comment_author_url;
}
}
/**
* Validates whether this comment is allowed to be made.
*
* @since 2.0.0
* @since 4.7.0 The `$avoid_die` parameter was added, allowing the function
* to return a WP_Error object instead of dying.
* @since 5.5.0 The `$avoid_die` parameter was renamed to `$wp_error`.
*
* @global wpdb $wpdb WordPress database abstraction object.
*
* @param array $commentdata Contains information on the comment.
* @param bool $wp_error When true, a disallowed comment will result in the function
* returning a WP_Error object, rather than executing wp_die().
* Default false.
* @return int|string|WP_Error Allowed comments return the approval status (0|1|'spam'|'trash').
* If `$wp_error` is true, disallowed comments return a WP_Error.
*/
function wp_allow_comment( $commentdata, $wp_error = false ) {
global $wpdb;
/*
* Simple duplicate check.
* expected_slashed ($comment_post_ID, $comment_author, $comment_author_email, $comment_content)
*/
$dupe = $wpdb->prepare(
"SELECT comment_ID FROM $wpdb->comments WHERE comment_post_ID = %d AND comment_parent = %s AND comment_approved != 'trash' AND ( comment_author = %s ",
wp_unslash( $commentdata['comment_post_ID'] ),
wp_unslash( $commentdata['comment_parent'] ),
wp_unslash( $commentdata['comment_author'] )
);
if ( $commentdata['comment_author_email'] ) {
$dupe .= $wpdb->prepare(
'AND comment_author_email = %s ',
wp_unslash( $commentdata['comment_author_email'] )
);
}
$dupe .= $wpdb->prepare(
') AND comment_content = %s LIMIT 1',
wp_unslash( $commentdata['comment_content'] )
);
$dupe_id = $wpdb->get_var( $dupe );
/**
* Filters the ID, if any, of the duplicate comment found when creating a new comment.
*
* Return an empty value from this filter to allow what WP considers a duplicate comment.
*
* @since 4.4.0
*
* @param int $dupe_id ID of the comment identified as a duplicate.
* @param array $commentdata Data for the comment being created.
*/
$dupe_id = apply_filters( 'duplicate_comment_id', $dupe_id, $commentdata );
if ( $dupe_id ) {
/**
* Fires immediately after a duplicate comment is detected.
*
* @since 3.0.0
*
* @param array $commentdata Comment data.
*/
do_action( 'comment_duplicate_trigger', $commentdata );
/**
* Filters duplicate comment error message.
*
* @since 5.2.0
*
* @param string $comment_duplicate_message Duplicate comment error message.
*/
$comment_duplicate_message = apply_filters( 'comment_duplicate_message', __( 'Duplicate comment detected; it looks as though you’ve already said that!' ) );
if ( $wp_error ) {
return new WP_Error( 'comment_duplicate', $comment_duplicate_message, 409 );
} else {
if ( wp_doing_ajax() ) {
die( $comment_duplicate_message );
}
wp_die( $comment_duplicate_message, 409 );
}
}
/**
* Fires immediately before a comment is marked approved.
*
* Allows checking for comment flooding.
*
* @since 2.3.0
* @since 4.7.0 The `$avoid_die` parameter was added.
* @since 5.5.0 The `$avoid_die` parameter was renamed to `$wp_error`.
*
* @param string $comment_author_ip Comment author's IP address.
* @param string $comment_author_email Comment author's email.
* @param string $comment_date_gmt GMT date the comment was posted.
* @param bool $wp_error Whether to return a WP_Error object instead of executing
* wp_die() or die() if a comment flood is occurring.
*/
do_action(
'check_comment_flood',
$commentdata['comment_author_IP'],
$commentdata['comment_author_email'],
$commentdata['comment_date_gmt'],
$wp_error
);
/**
* Filters whether a comment is part of a comment flood.
*
* The default check is wp_check_comment_flood(). See check_comment_flood_db().
*
* @since 4.7.0
* @since 5.5.0 The `$avoid_die` parameter was renamed to `$wp_error`.
*
* @param bool $is_flood Is a comment flooding occurring? Default false.
* @param string $comment_author_ip Comment author's IP address.
* @param string $comment_author_email Comment author's email.
* @param string $comment_date_gmt GMT date the comment was posted.
* @param bool $wp_error Whether to return a WP_Error object instead of executing
* wp_die() or die() if a comment flood is occurring.
*/
$is_flood = apply_filters(
'wp_is_comment_flood',
false,
$commentdata['comment_author_IP'],
$commentdata['comment_author_email'],
$commentdata['comment_date_gmt'],
$wp_error
);
if ( $is_flood ) {
/** This filter is documented in wp-includes/comment-template.php */
$comment_flood_message = apply_filters( 'comment_flood_message', __( 'You are posting comments too quickly. Slow down.' ) );
return new WP_Error( 'comment_flood', $comment_flood_message, 429 );
}
return wp_check_comment_data( $commentdata );
}
/**
* Hooks WP's native database-based comment-flood check.
*
* This wrapper maintains backward compatibility with plugins that expect to
* be able to unhook the legacy check_comment_flood_db() function from
* 'check_comment_flood' using remove_action().
*
* @since 2.3.0
* @since 4.7.0 Converted to be an add_filter() wrapper.
*/
function check_comment_flood_db() {
add_filter( 'wp_is_comment_flood', 'wp_check_comment_flood', 10, 5 );
}
/**
* Checks whether comment flooding is occurring.
*
* Won't run, if current user can manage options, so to not block
* administrators.
*
* @since 4.7.0
*
* @global wpdb $wpdb WordPress database abstraction object.
*
* @param bool $is_flood Is a comment flooding occurring?
* @param string $ip Comment author's IP address.
* @param string $email Comment author's email address.
* @param string $date MySQL time string.
* @param bool $avoid_die When true, a disallowed comment will result in the function
* returning without executing wp_die() or die(). Default false.
* @return bool Whether comment flooding is occurring.
*/
function wp_check_comment_flood( $is_flood, $ip, $email, $date, $avoid_die = false ) {
global $wpdb;
// Another callback has declared a flood. Trust it.
if ( true === $is_flood ) {
return $is_flood;
}
// Don't throttle admins or moderators.
if ( current_user_can( 'manage_options' ) || current_user_can( 'moderate_comments' ) ) {
return false;
}
$hour_ago = gmdate( 'Y-m-d H:i:s', time() - HOUR_IN_SECONDS );
if ( is_user_logged_in() ) {
$user = get_current_user_id();
$check_column = '`user_id`';
} else {
$user = $ip;
$check_column = '`comment_author_IP`';
}
$sql = $wpdb->prepare(
"SELECT `comment_date_gmt` FROM `$wpdb->comments` WHERE `comment_date_gmt` >= %s AND ( $check_column = %s OR `comment_author_email` = %s ) ORDER BY `comment_date_gmt` DESC LIMIT 1",
$hour_ago,
$user,
$email
);
$lasttime = $wpdb->get_var( $sql );
if ( $lasttime ) {
$time_lastcomment = mysql2date( 'U', $lasttime, false );
$time_newcomment = mysql2date( 'U', $date, false );
/**
* Filters the comment flood status.
*
* @since 2.1.0
*
* @param bool $bool Whether a comment flood is occurring. Default false.
* @param int $time_lastcomment Timestamp of when the last comment was posted.
* @param int $time_newcomment Timestamp of when the new comment was posted.
*/
$flood_die = apply_filters( 'comment_flood_filter', false, $time_lastcomment, $time_newcomment );
if ( $flood_die ) {
/**
* Fires before the comment flood message is triggered.
*
* @since 1.5.0
*
* @param int $time_lastcomment Timestamp of when the last comment was posted.
* @param int $time_newcomment Timestamp of when the new comment was posted.
*/
do_action( 'comment_flood_trigger', $time_lastcomment, $time_newcomment );
if ( $avoid_die ) {
return true;
} else {
/**
* Filters the comment flood error message.
*
* @since 5.2.0
*
* @param string $comment_flood_message Comment flood error message.
*/
$comment_flood_message = apply_filters( 'comment_flood_message', __( 'You are posting comments too quickly. Slow down.' ) );
if ( wp_doing_ajax() ) {
die( $comment_flood_message );
}
wp_die( $comment_flood_message, 429 );
}
}
}
return false;
}
/**
* Separates an array of comments into an array keyed by comment_type.
*
* @since 2.7.0
*
* @param WP_Comment[] $comments Array of comments.
* @return array<string, WP_Comment[]> Array of comments keyed by comment type.
*/
function separate_comments( &$comments ) {
$comments_by_type = array(
'comment' => array(),
'trackback' => array(),
'pingback' => array(),
'pings' => array(),
);
$count = count( $comments );
for ( $i = 0; $i < $count; $i++ ) {
$type = $comments[ $i ]->comment_type;
if ( empty( $type ) ) {
$type = 'comment';
}
$comments_by_type[ $type ][] = &$comments[ $i ];
if ( 'trackback' === $type || 'pingback' === $type ) {
$comments_by_type['pings'][] = &$comments[ $i ];
}
}
return $comments_by_type;
}
/**
* Calculates the total number of comment pages.
*
* @since 2.7.0
*
* @uses Walker_Comment
*
* @global WP_Query $wp_query WordPress Query object.
*
* @param WP_Comment[] $comments Optional. Array of WP_Comment objects. Defaults to `$wp_query->comments`.
* @param int $per_page Optional. Comments per page. Defaults to the value of `comments_per_page`
* query var, option of the same name, or 1 (in that order).
* @param bool $threaded Optional. Control over flat or threaded comments. Defaults to the value
* of `thread_comments` option.
* @return int Number of comment pages.
*/
function get_comment_pages_count( $comments = null, $per_page = null, $threaded = null ) {
global $wp_query;
if ( null === $comments && null === $per_page && null === $threaded && ! empty( $wp_query->max_num_comment_pages ) ) {
return $wp_query->max_num_comment_pages;
}
if ( ( ! $comments || ! is_array( $comments ) ) && ! empty( $wp_query->comments ) ) {
$comments = $wp_query->comments;
}
if ( empty( $comments ) ) {
return 0;
}
if ( ! get_option( 'page_comments' ) ) {
return 1;
}
if ( ! isset( $per_page ) ) {