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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 |
|---|---|
| 3344 | * |
| 3345 | * @since 3.1.0 |
| 3346 | * |
| 3347 | * @param int $parent ID of the parent term. |
| 3348 | * @param int $term_id Term ID. |
| 3349 | * @param string $taxonomy Taxonomy slug. |
| 3350 | * @param array $parsed_args An array of potentially altered update arguments for the given term. |
| 3351 | * @param array $args An array of update arguments for the given term. |
| 3352 | */ |
| 3353 | $parent = apply_filters( 'wp_update_term_parent', $args['parent'], $term_id, $taxonomy, $parsed_args, $args ); |
| 3354 | |
| 3355 | // Check for duplicate slug |
| 3356 | $id = $wpdb->get_var( $wpdb->prepare( "SELECT term_id FROM $wpdb->terms WHERE slug = %s", $slug ) ); |
| 3357 | if ( $id && ($id != $term_id) ) { |
| 3358 | // If an empty slug was passed or the parent changed, reset the slug to something unique. |
| 3359 | // Otherwise, bail. |
| 3360 | if ( $empty_slug || ( $parent != $term['parent']) ) |
| 3361 | $slug = wp_unique_term_slug($slug, (object) $args); |
| 3362 | else |