woocommerce_attribute_default_visibility │ filter-hook │ WC 1.0

Usage

add_filter( 'woocommerce_attribute_default_visibility', 'wp_kama_woocommerce_attribute_default_visibility_filter' );

/**
 * Function for `woocommerce_attribute_default_visibility` filter-hook.
 * 
 * @param  $1 
 *
 * @return 
 */
function wp_kama_woocommerce_attribute_default_visibility_filter( $1 ){

	// filter...
	return $1;
}

$1

-

Where the hook is called

$attribute->set_visible( apply_filters( 'woocommerce_attribute_default_visibility', 1 ) );

Where the hook is used in WooCommerce