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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 |
|---|---|
| 2405 | |
| 2406 | /** |
| 2407 | * Fires when deleting a term, before any modifications are made to posts or terms. |
| 2408 | * |
| 2409 | * @since 4.1.0 |
| 2410 | * |
| 2411 | * @param int $term Term ID. |
| 2412 | * @param string $taxonomy Taxonomy Name. |
| 2413 | */ |
| 2414 | do_action( 'pre_delete_term', $term, $taxonomy ); |
| 2415 | |
| 2416 | // Update children to point to new parent |
| 2417 | if ( is_taxonomy_hierarchical($taxonomy) ) { |
| 2418 | $term_obj = get_term($term, $taxonomy); |
| 2419 | if ( is_wp_error( $term_obj ) ) |
| 2420 | return $term_obj; |
| 2421 | $parent = $term_obj->parent; |
| 2422 | |
| 2423 | $edit_ids = $wpdb->get_results( "SELECT term_id, term_taxonomy_id FROM $wpdb->term_taxonomy WHERE `parent` = " . (int)$term_obj->term_id ); |