woocommerce_registration_errors filter-hook . WC 1.0

Usage

add_filter( 'woocommerce_registration_errors', 'filter_function_name_7915', 10, 3 );
function filter_function_name_7915( $errors, $username, $email ){
	// filter...

	return $errors;
}

$errors

-

$username

-

$email

-

Where the hook is called

$errors = apply_filters( 'woocommerce_registration_errors', $errors, $username, $email );

$errors = apply_filters( 'woocommerce_registration_errors', $errors, $username, $user_email );

Where in WP core the hook is used WooCommerce