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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 |
---|---|
2853 | } |
2854 | /** |
2855 | * Filter a term before it is sanitized and inserted into the database. |
2856 | * |
2857 | * @since 3.0.0 |
2858 | * |
2859 | * @param string $term The term to add or update. |
2860 | * @param string $taxonomy Taxonomy slug. |
2861 | */ |
2862 | $term = apply_filters( 'pre_insert_term', $term, $taxonomy ); |
2863 | if ( is_wp_error( $term ) ) { |
2864 | return $term; |
2865 | } |
2866 | if ( is_int($term) && 0 == $term ) { |
2867 | return new WP_Error('invalid_term_id', __('Invalid term ID')); |
2868 | } |
2869 | if ( '' == trim($term) ) { |
2870 | return new WP_Error('empty_term_name', __('A name is required for this term')); |
2871 | } |