]> scripts.mit.edu Git - autoinstalls/wordpress.git/blobdiff - wp-includes/comment.php
WordPress 3.8
[autoinstalls/wordpress.git] / wp-includes / comment.php
index 9975158c7404ac0d94d6649f32c80a153e4d2550..3019036c194e070f7fc8efd2c0966846621c0ca4 100644 (file)
@@ -44,12 +44,21 @@ function check_comment($author, $email, $url, $comment, $user_ip, $user_agent, $
        if ( 1 == get_option('comment_moderation') )
                return false; // If moderation is set to manual
 
+       /** This filter is documented in wp-includes/comment-template.php */
        $comment = apply_filters( 'comment_text', $comment );
 
        // Check # of external links
        if ( $max_links = get_option( 'comment_max_links' ) ) {
                $num_links = preg_match_all( '/<a [^>]*href/i', $comment, $out );
-               $num_links = apply_filters( 'comment_max_links_url', $num_links, $url ); // provide for counting of $url as a link
+               /**
+                * Filter the maximum number of links allowed in a comment.
+                *
+                * @since 3.0.0
+                *
+                * @param int    $num_links The number of links allowed.
+                * @param string $url       Comment author's URL. Included in allowed links total.
+                */
+               $num_links = apply_filters( 'comment_max_links_url', $num_links, $url );
                if ( $num_links >= $max_links )
                        return false;
        }
@@ -147,7 +156,14 @@ function get_comment(&$comment, $output = OBJECT) {
                }
        }
 
-       $_comment = apply_filters('get_comment', $_comment);
+       /**
+        * Fires after a comment is retrieved.
+        *
+        * @since 2.3.0
+        *
+        * @param mixed $_comment Comment data.
+        */
+       $_comment = apply_filters( 'get_comment', $_comment );
 
        if ( $output == OBJECT ) {
                return $_comment;
@@ -251,6 +267,13 @@ class WP_Comment_Query {
                $this->meta_query = new WP_Meta_Query();
                $this->meta_query->parse_query_vars( $this->query_vars );
 
+               /**
+                * Fires before comments are retrieved.
+                *
+                * @since 3.1.0
+                *
+                * @param WP_Comment_Query &$this Current instance of WP_Comment_Query, passed by reference.
+                */
                do_action_ref_array( 'pre_get_comments', array( &$this ) );
                extract( $this->query_vars, EXTR_SKIP );
 
@@ -376,6 +399,14 @@ class WP_Comment_Query {
                }
 
                $pieces = array( 'fields', 'join', 'where', 'orderby', 'order', 'limits', 'groupby' );
+               /**
+                * Filter the comment query clauses.
+                *
+                * @since 3.1.0
+                *
+                * @param array            $pieces A compacted array of comment query clauses.
+                * @param WP_Comment_Query &$this  Current instance of WP_Comment_Query, passed by reference.
+                */
                $clauses = apply_filters_ref_array( 'comments_clauses', array( compact( $pieces ), &$this ) );
                foreach ( $pieces as $piece )
                        $$piece = isset( $clauses[ $piece ] ) ? $clauses[ $piece ] : '';
@@ -389,6 +420,14 @@ class WP_Comment_Query {
                        return $wpdb->get_var( $query );
 
                $comments = $wpdb->get_results( $query );
+               /**
+                * Filter the comment query results.
+                *
+                * @since 3.1.0
+                *
+                * @param array            $comments An array of comments.
+                * @param WP_Comment_Query &$this    Current instance of WP_Comment_Query, passed by reference.
+                */
                $comments = apply_filters_ref_array( 'the_comments', array( $comments, &$this ) );
 
                wp_cache_add( $cache_key, $comments, 'comment' );
@@ -396,7 +435,7 @@ class WP_Comment_Query {
                return $comments;
        }
 
-       /*
+       /**
         * Used internally to generate an SQL string for searching across multiple columns
         *
         * @access protected
@@ -629,7 +668,14 @@ function wp_set_comment_cookies($comment, $user) {
        if ( $user->exists() )
                return;
 
-       $comment_cookie_lifetime = apply_filters('comment_cookie_lifetime', 30000000);
+       /**
+        * Filter the lifetime of the comment cookie in seconds.
+        *
+        * @since 2.8.0
+        *
+        * @param int $seconds Comment cookie lifetime. Default 30000000.
+        */
+       $comment_cookie_lifetime = apply_filters( 'comment_cookie_lifetime', 30000000 );
        setcookie('comment_author_' . COOKIEHASH, $comment->comment_author, time() + $comment_cookie_lifetime, COOKIEPATH, COOKIE_DOMAIN);
        setcookie('comment_author_email_' . COOKIEHASH, $comment->comment_author_email, time() + $comment_cookie_lifetime, COOKIEPATH, COOKIE_DOMAIN);
        setcookie('comment_author_url_' . COOKIEHASH, esc_url($comment->comment_author_url), time() + $comment_cookie_lifetime, COOKIEPATH, COOKIE_DOMAIN);
@@ -644,22 +690,52 @@ function wp_set_comment_cookies($comment, $user) {
  * @since 2.0.4
  */
 function sanitize_comment_cookies() {
-       if ( isset($_COOKIE['comment_author_'.COOKIEHASH]) ) {
-               $comment_author = apply_filters('pre_comment_author_name', $_COOKIE['comment_author_'.COOKIEHASH]);
+       if ( isset( $_COOKIE['comment_author_' . COOKIEHASH] ) ) {
+               /**
+                * Filter 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;
+               $_COOKIE['comment_author_' . COOKIEHASH] = $comment_author;
        }
 
-       if ( isset($_COOKIE['comment_author_email_'.COOKIEHASH]) ) {
-               $comment_author_email = apply_filters('pre_comment_author_email', $_COOKIE['comment_author_email_'.COOKIEHASH]);
+       if ( isset( $_COOKIE['comment_author_email_' . COOKIEHASH] ) ) {
+               /**
+                * Filter 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]) ) {
-               $comment_author_url = apply_filters('pre_comment_author_url', $_COOKIE['comment_author_url_'.COOKIEHASH]);
+       if ( isset( $_COOKIE['comment_author_url_' . COOKIEHASH] ) ) {
+               /**
+                * Filter 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] = $comment_author_url;
        }
@@ -688,6 +764,13 @@ function wp_allow_comment($commentdata) {
                $dupe .= $wpdb->prepare( "OR comment_author_email = %s ", wp_unslash( $comment_author_email ) );
        $dupe .= $wpdb->prepare( ") AND comment_content = %s LIMIT 1", wp_unslash( $comment_content ) );
        if ( $wpdb->get_var($dupe) ) {
+               /**
+                * Fires immediately after a duplicate comment is detected.
+                *
+                * @since 3.0.0
+                *
+                * @param array $commentdata Comment data.
+                */
                do_action( 'comment_duplicate_trigger', $commentdata );
                if ( defined('DOING_AJAX') )
                        die( __('Duplicate comment detected; it looks as though you&#8217;ve already said that!') );
@@ -695,6 +778,17 @@ function wp_allow_comment($commentdata) {
                wp_die( __('Duplicate comment detected; it looks as though you&#8217;ve already said that!') );
        }
 
+       /**
+        * Fires immediately before a comment is marked approved.
+        *
+        * Allows checking for comment flooding.
+        *
+        * @since 2.3.0
+        *
+        * @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.
+        */
        do_action( 'check_comment_flood', $comment_author_IP, $comment_author_email, $comment_date_gmt );
 
        if ( ! empty( $user_id ) ) {
@@ -705,7 +799,7 @@ function wp_allow_comment($commentdata) {
        if ( isset( $user ) && ( $user_id == $post_author || $user->has_cap( 'moderate_comments' ) ) ) {
                // The author and the admins get respect.
                $approved = 1;
-        } else {
+       } else {
                // Everyone else's comments will be checked.
                if ( check_comment($comment_author, $comment_author_email, $comment_author_url, $comment_content, $comment_author_IP, $comment_agent, $comment_type) )
                        $approved = 1;
@@ -715,6 +809,14 @@ function wp_allow_comment($commentdata) {
                        $approved = 'spam';
        }
 
+       /**
+        * Filter a comment's approval status before it is set.
+        *
+        * @since 2.1.0
+        *
+        * @param bool|string $approved    The approval status. Accepts 1, 0, or 'spam'.
+        * @param array       $commentdata Comment data.
+        */
        $approved = apply_filters( 'pre_comment_approved', $approved, $commentdata );
        return $approved;
 }
@@ -744,9 +846,26 @@ function check_comment_flood_db( $ip, $email, $date ) {
        if ( $lasttime = $wpdb->get_var( $wpdb->prepare( "SELECT `comment_date_gmt` FROM `$wpdb->comments` WHERE `comment_date_gmt` >= %s AND ( `comment_author_IP` = %s OR `comment_author_email` = %s ) ORDER BY `comment_date_gmt` DESC LIMIT 1", $hour_ago, $ip, $email ) ) ) {
                $time_lastcomment = mysql2date('U', $lasttime, false);
                $time_newcomment  = mysql2date('U', $date, false);
-               $flood_die = apply_filters('comment_flood_filter', false, $time_lastcomment, $time_newcomment);
+               /**
+                * Filter 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 ) {
-                       do_action('comment_flood_trigger', $time_lastcomment, $time_newcomment);
+                       /**
+                        * 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 ( defined('DOING_AJAX') )
                                die( __('You are posting comments too quickly. Slow down.') );
@@ -902,7 +1021,19 @@ function get_page_of_comment( $comment_ID, $args = array() ) {
  * @return bool True if comment contains blacklisted content, false if comment does not
  */
 function wp_blacklist_check($author, $email, $url, $comment, $user_ip, $user_agent) {
-       do_action('wp_blacklist_check', $author, $email, $url, $comment, $user_ip, $user_agent);
+       /**
+        * Fires before the comment is tested for blacklisted characters or words.
+        *
+        * @since 1.5.0
+        *
+        * @param string $author     Comment author.
+        * @param string $email      Comment author's email.
+        * @param string $url        Comment author's URL.
+        * @param string $comment    Comment content.
+        * @param string $user_ip    Comment author's IP address.
+        * @param string $user_agent Comment author's browser user agent.
+        */
+       do_action( 'wp_blacklist_check', $author, $email, $url, $comment, $user_ip, $user_agent );
 
        $mod_keys = trim( get_option('blacklist_keys') );
        if ( '' == $mod_keys )
@@ -954,7 +1085,15 @@ function wp_count_comments( $post_id = 0 ) {
 
        $post_id = (int) $post_id;
 
-       $stats = apply_filters('wp_count_comments', array(), $post_id);
+       /**
+        * Filter the comments count for a given post.
+        *
+        * @since 2.7.0
+        *
+        * @param array $count   An empty array.
+        * @param int   $post_id The post ID.
+        */
+       $stats = apply_filters( 'wp_count_comments', array(), $post_id );
        if ( !empty($stats) )
                return $stats;
 
@@ -1019,7 +1158,14 @@ function wp_delete_comment($comment_id, $force_delete = false) {
        if ( !$force_delete && EMPTY_TRASH_DAYS && !in_array( wp_get_comment_status($comment_id), array( 'trash', 'spam' ) ) )
                return wp_trash_comment($comment_id);
 
-       do_action('delete_comment', $comment_id);
+       /**
+        * Fires immediately before a comment is deleted from the database.
+        *
+        * @since 1.2.0
+        *
+        * @param int $comment_id The comment ID.
+        */
+       do_action( 'delete_comment', $comment_id );
 
        // Move children up a level.
        $children = $wpdb->get_col( $wpdb->prepare("SELECT comment_ID FROM $wpdb->comments WHERE comment_parent = %d", $comment_id) );
@@ -1035,7 +1181,15 @@ function wp_delete_comment($comment_id, $force_delete = false) {
 
        if ( ! $wpdb->delete( $wpdb->comments, array( 'comment_ID' => $comment_id ) ) )
                return false;
-       do_action('deleted_comment', $comment_id);
+
+       /**
+        * Fires immediately after a comment is deleted from the database.
+        *
+        * @since 2.9.0
+        *
+        * @param int $comment_id The comment ID.
+        */
+       do_action( 'deleted_comment', $comment_id );
 
        $post_id = $comment->comment_post_ID;
        if ( $post_id && $comment->comment_approved == 1 )
@@ -1043,7 +1197,15 @@ function wp_delete_comment($comment_id, $force_delete = false) {
 
        clean_comment_cache($comment_id);
 
-       do_action('wp_set_comment_status', $comment_id, 'delete');
+       /**
+        * Fires immediately before changing the comment's status to 'delete'.
+        *
+        * @since 1.5.0
+        *
+        * @param int    $comment_id The comment ID.
+        * @param string $status     The new 'delete' comment status.
+        */
+       do_action( 'wp_set_comment_status', $comment_id, 'delete' );
        wp_transition_comment_status('delete', $comment->comment_approved, $comment);
        return true;
 }
@@ -1068,12 +1230,27 @@ function wp_trash_comment($comment_id) {
        if ( !$comment = get_comment($comment_id) )
                return false;
 
-       do_action('trash_comment', $comment_id);
+       /**
+        * Fires immediately before a comment is sent to the Trash.
+        *
+        * @since 2.9.0
+        *
+        * @param int $comment_id The comment ID.
+        */
+       do_action( 'trash_comment', $comment_id );
 
        if ( wp_set_comment_status($comment_id, 'trash') ) {
                add_comment_meta($comment_id, '_wp_trash_meta_status', $comment->comment_approved);
                add_comment_meta($comment_id, '_wp_trash_meta_time', time() );
-               do_action('trashed_comment', $comment_id);
+
+               /**
+                * Fires immediately after a comment is sent to Trash.
+                *
+                * @since 2.9.0
+                *
+                * @param int $comment_id The comment ID.
+                */
+               do_action( 'trashed_comment', $comment_id );
                return true;
        }
 
@@ -1094,7 +1271,14 @@ function wp_untrash_comment($comment_id) {
        if ( ! (int)$comment_id )
                return false;
 
-       do_action('untrash_comment', $comment_id);
+       /**
+        * Fires immediately before a comment is restored from the Trash.
+        *
+        * @since 2.9.0
+        *
+        * @param int $comment_id The comment ID.
+        */
+       do_action( 'untrash_comment', $comment_id );
 
        $status = (string) get_comment_meta($comment_id, '_wp_trash_meta_status', true);
        if ( empty($status) )
@@ -1103,7 +1287,14 @@ function wp_untrash_comment($comment_id) {
        if ( wp_set_comment_status($comment_id, $status) ) {
                delete_comment_meta($comment_id, '_wp_trash_meta_time');
                delete_comment_meta($comment_id, '_wp_trash_meta_status');
-               do_action('untrashed_comment', $comment_id);
+               /**
+                * Fires immediately after a comment is restored from the Trash.
+                *
+                * @since 2.9.0
+                *
+                * @param int $comment_id The comment ID.
+                */
+               do_action( 'untrashed_comment', $comment_id );
                return true;
        }
 
@@ -1124,11 +1315,25 @@ function wp_spam_comment($comment_id) {
        if ( !$comment = get_comment($comment_id) )
                return false;
 
-       do_action('spam_comment', $comment_id);
+       /**
+        * Fires immediately before a comment is marked as Spam.
+        *
+        * @since 2.9.0
+        *
+        * @param int $comment_id The comment ID.
+        */
+       do_action( 'spam_comment', $comment_id );
 
        if ( wp_set_comment_status($comment_id, 'spam') ) {
                add_comment_meta($comment_id, '_wp_trash_meta_status', $comment->comment_approved);
-               do_action('spammed_comment', $comment_id);
+               /**
+                * Fires immediately after a comment is marked as Spam.
+                *
+                * @since 2.9.0
+                *
+                * @param int $comment_id The comment ID.
+                */
+               do_action( 'spammed_comment', $comment_id );
                return true;
        }
 
@@ -1149,7 +1354,14 @@ function wp_unspam_comment($comment_id) {
        if ( ! (int)$comment_id )
                return false;
 
-       do_action('unspam_comment', $comment_id);
+       /**
+        * Fires immediately before a comment is unmarked as Spam.
+        *
+        * @since 2.9.0
+        *
+        * @param int $comment_id The comment ID.
+        */
+       do_action( 'unspam_comment', $comment_id );
 
        $status = (string) get_comment_meta($comment_id, '_wp_trash_meta_status', true);
        if ( empty($status) )
@@ -1157,7 +1369,14 @@ function wp_unspam_comment($comment_id) {
 
        if ( wp_set_comment_status($comment_id, $status) ) {
                delete_comment_meta($comment_id, '_wp_trash_meta_status');
-               do_action('unspammed_comment', $comment_id);
+               /**
+                * Fires immediately after a comment is unmarked as Spam.
+                *
+                * @since 2.9.0
+                *
+                * @param int $comment_id The comment ID.
+                */
+               do_action( 'unspammed_comment', $comment_id );
                return true;
        }
 
@@ -1214,8 +1433,11 @@ function wp_get_comment_status($comment_id) {
  * @param object $comment Comment data.
  */
 function wp_transition_comment_status($new_status, $old_status, $comment) {
-       // Translate raw statuses to human readable formats for the hooks
-       // This is not a complete list of comment status, it's only the ones that need to be renamed
+       /*
+        * Translate raw statuses to human readable formats for the hooks.
+        * This is not a complete list of comment status, it's only the ones
+        * that need to be renamed
+        */
        $comment_statuses = array(
                0         => 'unapproved',
                'hold'    => 'unapproved', // wp_set_comment_status() uses "hold"
@@ -1227,10 +1449,43 @@ function wp_transition_comment_status($new_status, $old_status, $comment) {
 
        // Call the hooks
        if ( $new_status != $old_status ) {
-               do_action('transition_comment_status', $new_status, $old_status, $comment);
-               do_action("comment_{$old_status}_to_{$new_status}", $comment);
+               /**
+                * Fires when the comment status is in transition.
+                *
+                * @since 2.7.0
+                *
+                * @param int|string $new_status The new comment status.
+                * @param int|string $old_status The old comment status.
+                * @param object     $comment    The comment data.
+                */
+               do_action( 'transition_comment_status', $new_status, $old_status, $comment );
+               /**
+                * Fires when the comment status is in transition from one specific status to another.
+                *
+                * The dynamic portions of the hook name, $old_status, and $new_status,
+                * refer to the old and new comment statuses, respectively.
+                *
+                * @since 2.7.0
+                *
+                * @param object $comment Comment object.
+                */
+               do_action( "comment_{$old_status}_to_{$new_status}", $comment );
        }
-       do_action("comment_{$new_status}_{$comment->comment_type}", $comment->comment_ID, $comment);
+       /**
+        * Fires when the status of a specific comment type is in transition.
+        *
+        * The dynamic portions of the hook name, $new_status, and $comment->comment_type,
+        * refer to the new comment status, and the type of comment, respectively.
+        *
+        * Typical comment types include an empty string (standard comment), 'pingback',
+        * or 'trackback'.
+        *
+        * @since 2.7.0
+        *
+        * @param int $comment_ID The comment ID.
+        * @param obj $comment    Comment object.
+        */
+       do_action( "comment_{$new_status}_{$comment->comment_type}", $comment->comment_ID, $comment );
 }
 
 /**
@@ -1260,7 +1515,16 @@ function wp_get_current_commenter() {
        if ( isset($_COOKIE['comment_author_url_'.COOKIEHASH]) )
                $comment_author_url = $_COOKIE['comment_author_url_'.COOKIEHASH];
 
-       return apply_filters('wp_get_current_commenter', compact('comment_author', 'comment_author_email', 'comment_author_url'));
+       /**
+        * Filter the current commenter's name, email, and URL.
+        *
+        * @since 3.1.0
+        *
+        * @param string $comment_author       Comment author's name.
+        * @param string $comment_author_email Comment author's email.
+        * @param string $comment_author_url   Comment author's URL.
+        */
+       return apply_filters( 'wp_get_current_commenter', compact('comment_author', 'comment_author_email', 'comment_author_url') );
 }
 
 /**
@@ -1305,7 +1569,16 @@ function wp_insert_comment($commentdata) {
                wp_update_comment_count($comment_post_ID);
 
        $comment = get_comment($id);
-       do_action('wp_insert_comment', $id, $comment);
+
+       /**
+        * Fires immediately after a comment is inserted into the database.
+        *
+        * @since 2.8.0
+        *
+        * @param int $id      The comment ID.
+        * @param obj $comment Comment object.
+        */
+       do_action( 'wp_insert_comment', $id, $comment );
 
        wp_cache_set( 'last_changed', microtime(), 'comment' );
 
@@ -1320,34 +1593,64 @@ function wp_insert_comment($commentdata) {
  * filtering the same comment more than once.
  *
  * @since 2.0.0
- * @uses apply_filters() Calls 'pre_user_id' hook on comment author's user ID
- * @uses apply_filters() Calls 'pre_comment_user_agent' hook on comment author's user agent
- * @uses apply_filters() Calls 'pre_comment_author_name' hook on comment author's name
- * @uses apply_filters() Calls 'pre_comment_content' hook on the comment's content
- * @uses apply_filters() Calls 'pre_comment_user_ip' hook on comment author's IP
- * @uses apply_filters() Calls 'pre_comment_author_url' hook on comment author's URL
- * @uses apply_filters() Calls 'pre_comment_author_email' hook on comment author's email address
  *
  * @param array $commentdata Contains information on the comment.
  * @return array Parsed comment information.
  */
 function wp_filter_comment($commentdata) {
-       if ( isset($commentdata['user_ID']) )
-               $commentdata['user_id'] = apply_filters('pre_user_id', $commentdata['user_ID']);
-       elseif ( isset($commentdata['user_id']) )
-               $commentdata['user_id'] = apply_filters('pre_user_id', $commentdata['user_id']);
-       $commentdata['comment_agent']        = apply_filters('pre_comment_user_agent', ( isset( $commentdata['comment_agent'] ) ? $commentdata['comment_agent'] : '' ) );
-       $commentdata['comment_author']       = apply_filters('pre_comment_author_name', $commentdata['comment_author']);
-       $commentdata['comment_content']      = apply_filters('pre_comment_content', $commentdata['comment_content']);
-       $commentdata['comment_author_IP']    = apply_filters('pre_comment_user_ip', $commentdata['comment_author_IP']);
-       $commentdata['comment_author_url']   = apply_filters('pre_comment_author_url', $commentdata['comment_author_url']);
-       $commentdata['comment_author_email'] = apply_filters('pre_comment_author_email', $commentdata['comment_author_email']);
+       if ( isset( $commentdata['user_ID'] ) ) {
+               /**
+                * Filter the comment author's user id before it is set.
+                *
+                * The first time this filter is evaluated, 'user_ID' is checked
+                * (for back-compat), followed by the standard 'user_id' value.
+                *
+                * @since 1.5.0
+                *
+                * @param int $user_ID The comment author's user ID.
+                */
+               $commentdata['user_id'] = apply_filters( 'pre_user_id', $commentdata['user_ID'] );
+       } elseif ( isset( $commentdata['user_id'] ) ) {
+               /** This filter is documented in wp-includes/comment.php */
+               $commentdata['user_id'] = apply_filters( 'pre_user_id', $commentdata['user_id'] );
+       }
+
+       /**
+        * Filter the comment author's browser user agent before it is set.
+        *
+        * @since 1.5.0
+        *
+        * @param int $comment_agent The comment author's browser user agent.
+        */
+       $commentdata['comment_agent'] = apply_filters( 'pre_comment_user_agent', ( isset( $commentdata['comment_agent'] ) ? $commentdata['comment_agent'] : '' ) );
+       /** This filter is documented in wp-includes/comment.php */
+       $commentdata['comment_author'] = apply_filters( 'pre_comment_author_name', $commentdata['comment_author'] );
+       /**
+        * Filter the comment content before it is set.
+        *
+        * @since 1.5.0
+        *
+        * @param int $comment_content The comment content.
+        */
+       $commentdata['comment_content'] = apply_filters( 'pre_comment_content', $commentdata['comment_content'] );
+       /**
+        * Filter the comment author's IP before it is set.
+        *
+        * @since 1.5.0
+        *
+        * @param int $comment_author_ip The comment author's IP.
+        */
+       $commentdata['comment_author_IP'] = apply_filters( 'pre_comment_user_ip', $commentdata['comment_author_IP'] );
+       /** This filter is documented in wp-includes/comment.php */
+       $commentdata['comment_author_url'] = apply_filters( 'pre_comment_author_url', $commentdata['comment_author_url'] );
+       /** This filter is documented in wp-includes/comment.php */
+       $commentdata['comment_author_email'] = apply_filters( 'pre_comment_author_email', $commentdata['comment_author_email'] );
        $commentdata['filtered'] = true;
        return $commentdata;
 }
 
 /**
- * Whether comment should be blocked because of comment flood.
+ * Whether comment should be blocked because of comment flood.
  *
  * @since 2.1.0
  *
@@ -1377,17 +1680,18 @@ function wp_throttle_comment_flood($block, $time_lastcomment, $time_newcomment)
  * See {@link http://core.trac.wordpress.org/ticket/9235}
  *
  * @since 1.5.0
- * @uses apply_filters() Calls 'preprocess_comment' hook on $commentdata parameter array before processing
- * @uses do_action() Calls 'comment_post' hook on $comment_ID returned from adding the comment and if the comment was approved.
- * @uses wp_filter_comment() Used to filter comment before adding comment.
- * @uses wp_allow_comment() checks to see if comment is approved.
- * @uses wp_insert_comment() Does the actual comment insertion to the database.
- *
  * @param array $commentdata Contains information on the comment.
  * @return int The ID of the comment after adding.
  */
 function wp_new_comment( $commentdata ) {
-       $commentdata = apply_filters('preprocess_comment', $commentdata);
+       /**
+        * Filter a comment's data before it is sanitized and inserted into the database.
+        *
+        * @since 1.5.0
+        *
+        * @param array $commentdata Comment data.
+        */
+       $commentdata = apply_filters( 'preprocess_comment', $commentdata );
 
        $commentdata['comment_post_ID'] = (int) $commentdata['comment_post_ID'];
        if ( isset($commentdata['user_ID']) )
@@ -1411,16 +1715,26 @@ function wp_new_comment( $commentdata ) {
 
        $comment_ID = wp_insert_comment($commentdata);
 
-       do_action('comment_post', $comment_ID, $commentdata['comment_approved']);
+       /**
+        * Fires immediately after a comment is inserted into the database.
+        *
+        * @since 1.2.0
+        *
+        * @param int $comment_ID       The comment ID.
+        * @param int $comment_approved 1 (true) if the comment is approved, 0 (false) if not.
+        */
+       do_action( 'comment_post', $comment_ID, $commentdata['comment_approved'] );
 
        if ( 'spam' !== $commentdata['comment_approved'] ) { // If it's spam save it silently for later crunching
-               if ( '0' == $commentdata['comment_approved'] )
-                       wp_notify_moderator($comment_ID);
-
-               $post = get_post($commentdata['comment_post_ID']); // Don't notify if it's your own comment
+               if ( '0' == $commentdata['comment_approved'] ) {
+                       wp_notify_moderator( $comment_ID );
+               }
 
-               if ( get_option('comments_notify') && $commentdata['comment_approved'] && ( ! isset( $commentdata['user_id'] ) || $post->post_author != $commentdata['user_id'] ) )
-                       wp_notify_postauthor($comment_ID, isset( $commentdata['comment_type'] ) ? $commentdata['comment_type'] : '' );
+               // wp_notify_postauthor() checks if notifying the author of their own comment.
+               // By default, it won't, but filters can override this.
+               if ( get_option( 'comments_notify' ) && $commentdata['comment_approved'] ) {
+                       wp_notify_postauthor( $comment_ID );
+               }
        }
 
        return $comment_ID;
@@ -1453,8 +1767,7 @@ function wp_set_comment_status($comment_id, $comment_status, $wp_error = false)
                case '1':
                        $status = '1';
                        if ( get_option('comments_notify') ) {
-                               $comment = get_comment($comment_id);
-                               wp_notify_postauthor($comment_id, $comment->comment_type);
+                               wp_notify_postauthor( $comment_id );
                        }
                        break;
                case 'spam':
@@ -1480,7 +1793,18 @@ function wp_set_comment_status($comment_id, $comment_status, $wp_error = false)
 
        $comment = get_comment($comment_id);
 
-       do_action('wp_set_comment_status', $comment_id, $comment_status);
+       /**
+        * Fires after a comment status has been updated in the database.
+        *
+        * The hook also fires immediately before comment status transition hooks are fired.
+        *
+        * @since 1.5.0
+        *
+        * @param int         $comment_id     The comment ID.
+        * @param string|bool $comment_status The comment status. Possible values include 'hold',
+        *                                    'approve', 'spam', 'trash', or false.
+        */
+       do_action( 'wp_set_comment_status', $comment_id, $comment_status );
        wp_transition_comment_status($comment_status, $comment_old->comment_approved, $comment);
 
        wp_update_comment_count($comment->comment_post_ID);
@@ -1521,7 +1845,14 @@ function wp_update_comment($commentarr) {
        // Now extract the merged array.
        extract(wp_unslash($commentarr), EXTR_SKIP);
 
-       $comment_content = apply_filters('comment_save_pre', $comment_content);
+       /**
+        * Filter the comment content before it is updated in the database.
+        *
+        * @since 1.5.0
+        *
+        * @param string $comment_content The comment data.
+        */
+       $comment_content = apply_filters( 'comment_save_pre', $comment_content );
 
        $comment_date_gmt = get_gmt_from_date($comment_date);
 
@@ -1537,7 +1868,16 @@ function wp_update_comment($commentarr) {
 
        clean_comment_cache($comment_ID);
        wp_update_comment_count($comment_post_ID);
-       do_action('edit_comment', $comment_ID);
+       /**
+        * Fires immediately after a comment is updated in the database.
+        *
+        * The hook also fires immediately before comment status transition hooks are fired.
+        *
+        * @since 1.2.0
+        *
+        * @param int $comment_ID The comment ID.
+        */
+       do_action( 'edit_comment', $comment_ID );
        $comment = get_comment($comment_ID);
        wp_transition_comment_status($comment->comment_approved, $old_status, $comment);
        return $rval;
@@ -1634,8 +1974,18 @@ function wp_update_comment_count_now($post_id) {
 
        clean_post_cache( $post );
 
-       do_action('wp_update_comment_count', $post_id, $new, $old);
-       do_action('edit_post', $post_id, $post);
+       /**
+        * Fires immediately after a post's comment count is updated in the database.
+        *
+        * @since 2.3.0
+        *
+        * @param int $post_id Post ID.
+        * @param int $new     The new comment count.
+        * @param int $old     The old comment count.
+        */
+       do_action( 'wp_update_comment_count', $post_id, $new, $old );
+       /** This action is documented in wp-includes/post.php */
+       do_action( 'edit_post', $post_id, $post );
 
        return true;
 }
@@ -1765,15 +2115,19 @@ function do_trackbacks($post_id) {
                return;
        }
 
-       if ( empty($post->post_excerpt) )
-               $excerpt = apply_filters('the_content', $post->post_content, $post->ID);
-       else
-               $excerpt = apply_filters('the_excerpt', $post->post_excerpt);
+       if ( empty($post->post_excerpt) ) {
+               /** This filter is documented in wp-admin/post-template.php */
+               $excerpt = apply_filters( 'the_content', $post->post_content, $post->ID );
+       } else {
+               /** This filter is documented in wp-admin/post-template.php */
+               $excerpt = apply_filters( 'the_excerpt', $post->post_excerpt );
+       }
+
        $excerpt = str_replace(']]>', ']]&gt;', $excerpt);
        $excerpt = wp_html_excerpt($excerpt, 252, '&#8230;');
 
        /** This filter is documented in wp-includes/post-template.php */
-       $post_title = apply_filters('the_title', $post->post_title, $post->ID);
+       $post_title = apply_filters( 'the_title', $post->post_title, $post->ID );
        $post_title = strip_tags($post_title);
 
        if ( $to_ping ) {
@@ -1856,6 +2210,15 @@ function pingback($content, $post_ID) {
        endforeach;
 
        $post_links = array_unique( $post_links );
+       /**
+        * Fires just before pinging back links found in a post.
+        *
+        * @since 2.0.0
+        *
+        * @param array &$post_links An array of post links to be checked, passed by reference.
+        * @param array &$pung       Whether a link has already been pinged, passed by reference.
+        * @param int   $post_ID     The post ID.
+        */
        do_action_ref_array( 'pre_ping', array( &$post_links, &$pung, $post_ID ) );
 
        foreach ( (array) $post_links as $pagelinkedto ) {
@@ -1863,13 +2226,25 @@ function pingback($content, $post_ID) {
 
                if ( $pingback_server_url ) {
                        @ set_time_limit( 60 );
-                        // Now, the RPC call
+                       // Now, the RPC call
                        $pagelinkedfrom = get_permalink($post_ID);
 
                        // using a timeout of 3 seconds should be enough to cover slow servers
                        $client = new WP_HTTP_IXR_Client($pingback_server_url);
                        $client->timeout = 3;
-                       $client->useragent = apply_filters( 'pingback_useragent', $client->useragent . ' -- WordPress/' . $wp_version, $client->useragent, $pingback_server_url, $pagelinkedto, $pagelinkedfrom);
+                       /**
+                        * Filter the user agent sent when pinging-back a URL.
+                        *
+                        * @since 2.9.0
+                        *
+                        * @param string $concat_useragent    The user agent concatenated with ' -- WordPress/'
+                        *                                    and the WordPress version.
+                        * @param string $useragent           The useragent.
+                        * @param string $pingback_server_url The server URL being linked to.
+                        * @param string $pagelinkedto        URL of page linked to.
+                        * @param string $pagelinkedfrom      URL of page linked from.
+                        */
+                       $client->useragent = apply_filters( 'pingback_useragent', $client->useragent . ' -- WordPress/' . $wp_version, $client->useragent, $pingback_server_url, $pagelinkedto, $pagelinkedfrom );
                        // when set to true, this outputs debug messages by itself
                        $client->debug = false;
 
@@ -2046,6 +2421,13 @@ function _close_comments_for_old_posts( $posts, $query ) {
        if ( empty( $posts ) || ! $query->is_singular() || ! get_option( 'close_comments_for_old_posts' ) )
                return $posts;
 
+       /**
+        * Filter the list of post types to automatically close comments for.
+        *
+        * @since 3.2.0
+        *
+        * @param array $post_types An array of registered post types. Default array with 'post'.
+        */
        $post_types = apply_filters( 'close_comments_for_post_types', array( 'post' ) );
        if ( ! in_array( $posts[0]->post_type, $post_types ) )
                return $posts;
@@ -2085,6 +2467,7 @@ function _close_comments_for_old_post( $open, $post_id ) {
 
        $post = get_post($post_id);
 
+       /** This filter is documented in wp-includes/comment.php */
        $post_types = apply_filters( 'close_comments_for_post_types', array( 'post' ) );
        if ( ! in_array( $post->post_type, $post_types ) )
                return $open;