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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
2897      $to_ping = get_to_ping( $post );
2898      $pinged  = get_pung( $post );
2899      if ( empty( $to_ping ) ) {
2900           $wpdb->update( $wpdb->posts, array( 'to_ping' => '' ), array( 'ID' => $post->ID ) );
2901           return;
2902      }
2903
2904      if ( empty( $post->post_excerpt ) ) {
2905           /** This filter is documented in wp-includes/post-template.php */
2906           $excerpt = apply_filters( 'the_content', $post->post_content, $post->ID );
2907      } else {
2908           /** This filter is documented in wp-includes/post-template.php */
2909           $excerpt = apply_filters( 'the_excerpt', $post->post_excerpt );
2910      }
2911
2912      $excerpt = str_replace( ']]>', ']]>', $excerpt );
2913      $excerpt = wp_html_excerpt( $excerpt, 252, '…' );
2914
2915      /** This filter is documented in wp-includes/post-template.php */