Filter products by visibility

functions.php

add_action( 'restrict_manage_posts', 'wc_ninja_create_filter_dropdown' );
function wc_ninja_create_filter_dropdown(){
	$type = 'product';
	if ( isset( $_GET['post_type'] ) ) {
		$type = $_GET['post_type'];
	}

	if ( 'product' == $type ){
		$values = array(
			'Catalog & search' => 'visible',
			'Catalog' => 'catalog',
			'Search'  => 'search',
			'Hidden'  => 'hidden'
	);
	?>
		<select name="product_visibility">
		<option value=""><?php _e('Filter by Visibility ', 'wose45436'); ?></option>
		<?php
			$current_v = isset( $_GET['product_visibility'] ) ? $_GET['product_visibility'] : '';
			foreach ( $values as $label => $value ) {
				printf
					(
						'<option value="%s"%s>%s</option>',
						$value,
						$value == $current_v ? ' selected="selected"' : '',
						$label
					);
				}
		?>
		</select>
		<?php
	}
}


add_filter( 'parse_query', 'wc_ninja_parse_filter_dropdown' );
function wc_ninja_parse_filter_dropdown( $query ){
	global $pagenow;

	$type = 'product';
	if (isset($_GET['post_type'])) {
		$type = $_GET['post_type'];
	}

	if ( 'product' == $type && is_admin() && $pagenow=='edit.php' && isset( $_GET['product_visibility'] ) && $_GET['product_visibility'] != '') {
		$query->query_vars['meta_key'] = '_visibility';
		$query->query_vars['meta_value'] = $_GET['product_visibility'];
	}
}