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The best way to understand what a hook does is to look at where it occurs in the source code.
do_action( "hook_name" )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.
| 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 */ |