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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 |
|---|---|
| 2480 | $to_ping = get_to_ping( $post ); |
| 2481 | $pinged = get_pung( $post ); |
| 2482 | if ( empty( $to_ping ) ) { |
| 2483 | $wpdb->update($wpdb->posts, array( 'to_ping' => '' ), array( 'ID' => $post->ID ) ); |
| 2484 | return; |
| 2485 | } |
| 2486 | |
| 2487 | if ( empty($post->post_excerpt) ) { |
| 2488 | /** This filter is documented in wp-includes/post-template.php */ |
| 2489 | $excerpt = apply_filters( 'the_content', $post->post_content, $post->ID ); |
| 2490 | } else { |
| 2491 | /** This filter is documented in wp-includes/post-template.php */ |
| 2492 | $excerpt = apply_filters( 'the_excerpt', $post->post_excerpt ); |
| 2493 | } |
| 2494 | |
| 2495 | $excerpt = str_replace(']]>', ']]>', $excerpt); |
| 2496 | $excerpt = wp_html_excerpt($excerpt, 252, '…'); |
| 2497 | |
| 2498 | /** This filter is documented in wp-includes/post-template.php */ |