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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.

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

Source View

Line Code
620      $post = $wpdb->get_row("SELECT * FROM $wpdb->posts WHERE ID = $post_id");
621      $to_ping = get_to_ping($post_id);
622      $pinged  = get_pung($post_id);
623      if ( empty($to_ping) ) {
624           $wpdb->query("UPDATE $wpdb->posts SET to_ping = '' WHERE ID = '$post_id'");
625           return;
626      }
627
628      if ( empty($post->post_excerpt) )
629           $excerpt = apply_filters('the_content', $post->post_content);
630      else
631           $excerpt = apply_filters('the_excerpt', $post->post_excerpt);
632      $excerpt = str_replace(']]>', ']]>', $excerpt);
633      $excerpt = strip_tags($excerpt);
634      if ( function_exists('mb_strcut') ) // For international trackbacks
635          $excerpt = mb_strcut($excerpt, 0, 252, get_option('blog_charset')) . '...';
636      else
637           $excerpt = substr($excerpt, 0, 252) . '...';
638