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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 |
---|---|
664 | * |
665 | * - `manage_taxonomies_for_post_columns` |
666 | * - `manage_taxonomies_for_page_columns` |
667 | * |
668 | * @since 3.5.0 |
669 | * |
670 | * @param string[] $taxonomies Array of taxonomy names to show columns for. |
671 | * @param string $post_type The post type. |
672 | */ |
673 | $taxonomies = apply_filters( "manage_taxonomies_for_{$post_type}_columns", $taxonomies, $post_type ); |
674 | $taxonomies = array_filter( $taxonomies, 'taxonomy_exists' ); |
675 |
|
676 | foreach ( $taxonomies as $taxonomy ) { |
677 | if ( 'category' === $taxonomy ) { |
678 | $column_key = 'categories'; |
679 | } elseif ( 'post_tag' === $taxonomy ) { |
680 | $column_key = 'tags'; |
681 | } else { |
682 | $column_key = 'taxonomy-' . $taxonomy; |