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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 |
|---|---|
| 3139 | * |
| 3140 | * @since 3.1.0 |
| 3141 | * |
| 3142 | * @param int $parent ID of the parent term. |
| 3143 | * @param int $term_id Term ID. |
| 3144 | * @param string $taxonomy Taxonomy slug. |
| 3145 | * @param array $parsed_args An array of potentially altered update arguments for the given term. |
| 3146 | * @param array $args An array of update arguments for the given term. |
| 3147 | */ |
| 3148 | $parent = (int) apply_filters( 'wp_update_term_parent', $args['parent'], $term_id, $taxonomy, $parsed_args, $args ); |
| 3149 | |
| 3150 | // Check for duplicate slug. |
| 3151 | $duplicate = get_term_by( 'slug', $slug, $taxonomy ); |
| 3152 | if ( $duplicate && $duplicate->term_id !== $term_id ) { |
| 3153 | // If an empty slug was passed or the parent changed, reset the slug to something unique. |
| 3154 | // Otherwise, bail. |
| 3155 | if ( $empty_slug || ( $parent !== (int) $term['parent'] ) ) { |
| 3156 | $slug = wp_unique_term_slug( $slug, (object) $args ); |
| 3157 | } else { |