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Source View: comment_feed_join

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Understanding Source Code

The best way to understand what a hook does is to look at where it occurs in the source code.

  • Action hooks look like this: do_action( "hook_name" )
  • Filter hooks look like this: apply_filters( "hook_name", "what_to_filter" ).

Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.

Source View

This hook occurs 2 times in this file.

Line Code
3107                if ( !$q['suppress_filters'] ) {
3108                     /**
3109                      * Filter the JOIN clause of the comments feed query before sending.
3110                      *
3111                      * @since 2.2.0
3112                      *
3113                      * @param string   $cjoin The JOIN clause of the query.
3114                      * @param WP_Query &$this The WP_Query instance (passed by reference).
3115                      */
3116                     $cjoin = apply_filters_ref_array( 'comment_feed_join', array( $cjoin, &$this ) );
3117
3118                     /**
3119                      * Filter the WHERE clause of the comments feed query before sending.
3120                      *
3121                      * @since 2.2.0
3122                      *
3123                      * @param string   $cwhere The WHERE clause of the query.
3124                      * @param WP_Query &$this  The WP_Query instance (passed by reference).
3125                      */
 
Line Code
3506                 *
3507                 * @param array    $posts The post results array.
3508                 * @param WP_Query &$this The WP_Query instance (passed by reference).
3509                 */
3510                $this->posts = apply_filters_ref_array( 'posts_results', array( $this->posts, &$this ) );
3511           }
3512
3513           if ( !empty($this->posts) && $this->is_comment_feed && $this->is_singular ) {
3514                /** This filter is documented in wp-includes/query.php */
3515                $cjoin = apply_filters_ref_array( 'comment_feed_join', array( '', &$this ) );
3516
3517                /** This filter is documented in wp-includes/query.php */
3518                $cwhere = apply_filters_ref_array( 'comment_feed_where', array( "WHERE comment_post_ID = '{$this->posts[0]->ID}' AND comment_approved = '1'", &$this ) );
3519
3520                /** This filter is documented in wp-includes/query.php */
3521                $cgroupby = apply_filters_ref_array( 'comment_feed_groupby', array( '', &$this ) );
3522                $cgroupby = ( ! empty( $cgroupby ) ) ? 'GROUP BY ' . $cgroupby : '';
3523
3524                /** This filter is documented in wp-includes/query.php */