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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 |
---|---|
3015 | * |
3016 | * @param int $post_id Post ID. |
3017 | * @return array |
3018 | */ |
3019 | function get_pung($post_id) { |
3020 | global $wpdb; |
3021 | $pung = $wpdb->get_var( $wpdb->prepare( "SELECT pinged FROM $wpdb->posts WHERE ID = %d", $post_id )); |
3022 | $pung = trim($pung); |
3023 | $pung = preg_split('/\s/', $pung); |
3024 | $pung = apply_filters('get_pung', $pung); |
3025 | return $pung; |
3026 | } |
3027 |
|
3028 | /** |
3029 | * Retrieve URLs that need to be pinged. |
3030 | * |
3031 | * @since 1.5.0 |
3032 | * @uses $wpdb |
3033 | * |