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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 |
|---|---|
| 3299 | * |
| 3300 | * @param int $post_id Post ID. |
| 3301 | * @return array |
| 3302 | */ |
| 3303 | function get_pung($post_id) { |
| 3304 | global $wpdb; |
| 3305 | $pung = $wpdb->get_var( $wpdb->prepare( "SELECT pinged FROM $wpdb->posts WHERE ID = %d", $post_id )); |
| 3306 | $pung = trim($pung); |
| 3307 | $pung = preg_split('/\s/', $pung); |
| 3308 | $pung = apply_filters('get_pung', $pung); |
| 3309 | return $pung; |
| 3310 | } |
| 3311 | |
| 3312 | /** |
| 3313 | * Retrieve URLs that need to be pinged. |
| 3314 | * |
| 3315 | * @since 1.5.0 |
| 3316 | * @uses $wpdb |
| 3317 | * |