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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
1097      $post = $wpdb->get_row( $wpdb->prepare("SELECT * FROM $wpdb->posts WHERE ID = %d", $post_id) );
1098      $to_ping = get_to_ping($post_id);
1099      $pinged  = get_pung($post_id);
1100      if ( empty($to_ping) ) {
1101           $wpdb->query( $wpdb->prepare("UPDATE $wpdb->posts SET to_ping = '' WHERE ID = %d", $post_id) );
1102           return;
1103      }
1104
1105      if ( empty($post->post_excerpt) )
1106           $excerpt = apply_filters('the_content', $post->post_content);
1107      else
1108           $excerpt = apply_filters('the_excerpt', $post->post_excerpt);
1109      $excerpt = str_replace(']]>', ']]>', $excerpt);
1110      $excerpt = wp_html_excerpt($excerpt, 252) . '...';
1111
1112      $post_title = apply_filters('the_title', $post->post_title);
1113      $post_title = strip_tags($post_title);
1114
1115      if ( $to_ping ) {