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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 |
|---|---|
| 1536 | * @return mixed {@internal Missing Description}} |
| 1537 | */ |
| 1538 | function add_ping($post_id, $uri) { |
| 1539 | global $wpdb; |
| 1540 | $pung = $wpdb->get_var( $wpdb->prepare( "SELECT pinged FROM $wpdb->posts WHERE ID = %d", $post_id )); |
| 1541 | $pung = trim($pung); |
| 1542 | $pung = preg_split('/\s/', $pung); |
| 1543 | $pung[] = $uri; |
| 1544 | $new = implode("\n", $pung); |
| 1545 | $new = apply_filters('add_ping', $new); |
| 1546 | // expected_slashed ($new) |
| 1547 | $new = stripslashes($new); |
| 1548 | return $wpdb->update( $wpdb->posts, array( 'pinged' => $new ), array( 'ID' => $post_id ) ); |
| 1549 | } |
| 1550 | |
| 1551 | function get_enclosed($post_id) { // Get enclosures already enclosed for a post |
| 1552 | $custom_fields = get_post_custom( $post_id ); |
| 1553 | $pung = array(); |
| 1554 | if ( !is_array( $custom_fields ) ) |