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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 |
|---|---|
| 394 | $linkdata = array_merge($link, $linkdata); |
| 395 | $linkdata['link_category'] = $link_cats; |
| 396 | |
| 397 | return wp_insert_link($linkdata); |
| 398 | } |
| 399 | |
| 400 | function wp_delete_link($link_id) { |
| 401 | global $wpdb; |
| 402 | |
| 403 | do_action('delete_link', $link_id); |
| 404 | |
| 405 | $categories = wp_get_link_cats($link_id); |
| 406 | if( is_array( $categories ) ) { |
| 407 | foreach ( $categories as $category ) { |
| 408 | $wpdb->query("UPDATE $wpdb->categories SET link_count = link_count - 1 WHERE cat_ID = '$category'"); |
| 409 | wp_cache_delete($category, 'category'); |
| 410 | do_action('edit_category', $cat_id); |
| 411 | } |
| 412 | } |