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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
2902      $to_ping = get_to_ping( $post );
2903      $pinged  = get_pung( $post );
2904      if ( empty( $to_ping ) ) {
2905           $wpdb->update( $wpdb->posts, array( 'to_ping' => '' ), array( 'ID' => $post->ID ) );
2906           return;
2907      }
2908
2909      if ( empty( $post->post_excerpt ) ) {
2910           /** This filter is documented in wp-includes/post-template.php */
2911           $excerpt = apply_filters( 'the_content', $post->post_content, $post->ID );
2912      } else {
2913           /** This filter is documented in wp-includes/post-template.php */
2914           $excerpt = apply_filters( 'the_excerpt', $post->post_excerpt );
2915      }
2916
2917      $excerpt = str_replace( ']]>', ']]>', $excerpt );
2918      $excerpt = wp_html_excerpt( $excerpt, 252, '…' );
2919
2920      /** This filter is documented in wp-includes/post-template.php */