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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 |
|---|---|
| 1600 | * |
| 1601 | * @param int $post_id post ID |
| 1602 | * @return array {@internal Missing Description}} |
| 1603 | */ |
| 1604 | function get_to_ping($post_id) { |
| 1605 | global $wpdb; |
| 1606 | $to_ping = $wpdb->get_var( $wpdb->prepare( "SELECT to_ping FROM $wpdb->posts WHERE ID = %d", $post_id )); |
| 1607 | $to_ping = trim($to_ping); |
| 1608 | $to_ping = preg_split('/\s/', $to_ping, -1, PREG_SPLIT_NO_EMPTY); |
| 1609 | $to_ping = apply_filters('get_to_ping', $to_ping); |
| 1610 | return $to_ping; |
| 1611 | } |
| 1612 | |
| 1613 | /** |
| 1614 | * trackback_url_list() - Do trackbacks for a list of urls |
| 1615 | * |
| 1616 | * {@internal Missing Long Description}} |
| 1617 | * |
| 1618 | * @package WordPress |