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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 |
|---|---|
| 415 | $wpdb->query("UPDATE $wpdb->categories SET link_count = link_count - 1 WHERE cat_ID = '$category'"); |
| 416 | wp_cache_delete($category, 'category'); |
| 417 | do_action('edit_category', $cat_id); |
| 418 | } |
| 419 | } |
| 420 | |
| 421 | $wpdb->query("DELETE FROM $wpdb->link2cat WHERE link_id = '$link_id'"); |
| 422 | return $wpdb->query("DELETE FROM $wpdb->links WHERE link_id = '$link_id'"); |
| 423 | |
| 424 | do_action('deleted_link', $link_id); |
| 425 | } |
| 426 | |
| 427 | function wp_get_link_cats($link_ID = 0) { |
| 428 | global $wpdb; |
| 429 | |
| 430 | $sql = "SELECT category_id |
| 431 | FROM $wpdb->link2cat |
| 432 | WHERE link_id = $link_ID |
| 433 | ORDER BY category_id"; |