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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 |
|---|---|
| 758 | |
| 759 | foreach ( $custom_fields as $key => $val ) { |
| 760 | if ( 'enclosure' != $key || !is_array( $val ) ) |
| 761 | continue; |
| 762 | foreach( $val as $enc ) { |
| 763 | $enclosure = split( "\n", $enc ); |
| 764 | $pung[] = trim( $enclosure[ 0 ] ); |
| 765 | } |
| 766 | } |
| 767 | $pung = apply_filters('get_enclosed', $pung); |
| 768 | return $pung; |
| 769 | } |
| 770 | |
| 771 | function get_to_ping($post_id) { // Get any URIs in the todo list |
| 772 | global $wpdb; |
| 773 | $to_ping = $wpdb->get_var("SELECT to_ping FROM $wpdb->posts WHERE ID = $post_id"); |
| 774 | $to_ping = trim($to_ping); |
| 775 | $to_ping = preg_split('/\s/', $to_ping, -1, PREG_SPLIT_NO_EMPTY); |
| 776 | $to_ping = apply_filters('get_to_ping', $to_ping); |