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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 |
---|---|
854 | $pung = apply_filters('get_enclosed', $pung); |
855 | return $pung; |
856 | } |
857 |
|
858 | function get_pung($post_id) { // Get URLs already pung for a post |
859 | global $wpdb; |
860 | $pung = $wpdb->get_var("SELECT pinged FROM $wpdb->posts WHERE ID = $post_id"); |
861 | $pung = trim($pung); |
862 | $pung = preg_split('/\s/', $pung); |
863 | $pung = apply_filters('get_pung', $pung); |
864 | return $pung; |
865 | } |
866 |
|
867 | function get_to_ping($post_id) { // Get any URLs in the todo list |
868 | global $wpdb; |
869 | $to_ping = $wpdb->get_var("SELECT to_ping FROM $wpdb->posts WHERE ID = $post_id"); |
870 | $to_ping = trim($to_ping); |
871 | $to_ping = preg_split('/\s/', $to_ping, -1, PREG_SPLIT_NO_EMPTY); |
872 | $to_ping = apply_filters('get_to_ping', $to_ping); |