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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 |
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438 |
|
439 | /** |
440 | * Filters whether to remove the 'Categories' drop-down from the post list table. |
441 | * |
442 | * @since 4.6.0 |
443 | * |
444 | * @param bool $disable Whether to disable the categories drop-down. Default false. |
445 | * @param string $post_type Post type slug. |
446 | */ |
447 | if ( false !== apply_filters( 'disable_categories_dropdown', false, $post_type ) ) { |
448 | return; |
449 | } |
450 |
|
451 | if ( is_object_in_taxonomy( $post_type, 'category' ) ) { |
452 | $dropdown_options = array( |
453 | 'show_option_all' => get_taxonomy( 'category' )->labels->all_items, |
454 | 'hide_empty' => 0, |
455 | 'hierarchical' => 1, |
456 | 'show_count' => 0, |