WP_Posts_List_Table::categories_dropdown( string $post_type )

Source

protected function categories_dropdown( $post_type ) {
	global $cat;

	/**
	 * Filters whether to remove the 'Categories' drop-down from the post list table.
	 *
	 * @since 4.6.0
	 *
	 * @param bool   $disable   Whether to disable the categories drop-down. Default false.
	 * @param string $post_type Post type slug.
	 */
	if ( false !== apply_filters( 'disable_categories_dropdown', false, $post_type ) ) {
		return;
	}

	if ( is_object_in_taxonomy( $post_type, 'category' ) ) {
		$dropdown_options = array(
			'show_option_all' => get_taxonomy( 'category' )->labels->all_items,
			'hide_empty'      => 0,
			'hierarchical'    => 1,
			'show_count'      => 0,
			'orderby'         => 'name',
			'selected'        => $cat,
		);

		echo '<label class="screen-reader-text" for="cat">' . get_taxonomy( 'category' )->labels->filter_by_item . '</label>';

		wp_dropdown_categories( $dropdown_options );
	}
}

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