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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 |
---|---|
631 | * |
632 | * The dynamic portion of the hook name, `$post_type`, refers to the post |
633 | * type slug. |
634 | * |
635 | * @since 3.5.0 |
636 | * |
637 | * @param string[] $taxonomies Array of taxonomy names to show columns for. |
638 | * @param string $post_type The post type. |
639 | */ |
640 | $taxonomies = apply_filters( "manage_taxonomies_for_{$post_type}_columns", $taxonomies, $post_type ); |
641 | $taxonomies = array_filter( $taxonomies, 'taxonomy_exists' ); |
642 |
|
643 | foreach ( $taxonomies as $taxonomy ) { |
644 | if ( 'category' === $taxonomy ) { |
645 | $column_key = 'categories'; |
646 | } elseif ( 'post_tag' === $taxonomy ) { |
647 | $column_key = 'tags'; |
648 | } else { |
649 | $column_key = 'taxonomy-' . $taxonomy; |