Luhn
Edit this pageWarning: You are browsing the documentation for Symfony 2.2, which is no longer maintained.
Read the updated version of this page for Symfony 6.3 (the current stable version).
Luhn
2.2
The Luhn validation is new in Symfony 2.2.
This constraint is used to ensure that a credit card number passes the Luhn algorithm. It is useful as a first step to validating a credit card: before communicating with a payment gateway.
Applies to | property or method |
Options | |
Class | Luhn |
Validator | LuhnValidator |
Basic Usage
To use the Luhn validator, simply apply it to a property on an object that will contain a credit card number.
1 2 3 4 5 6
# src/Acme/SubscriptionBundle/Resources/config/validation.yml
Acme\SubscriptionBundle\Entity\Transaction:
properties:
cardNumber:
- Luhn:
message: Please check your credit card number.
1 2 3 4 5 6 7 8 9 10 11 12
// src/Acme/SubscriptionBundle/Entity/Transaction.php
namespace Acme\SubscriptionBundle\Entity\Transaction;
use Symfony\Component\Validator\Constraints as Assert;
class Transaction
{
/**
* @Assert\Luhn(message = "Please check your credit card number.")
*/
protected $cardNumber;
}
1 2 3 4 5 6 7 8 9 10 11 12 13 14
<!-- src/Acme/SubscriptionBundle/Resources/config/validation.xml -->
<?xml version="1.0" encoding="UTF-8" ?>
<constraint-mapping xmlns="http://symfony.com/schema/dic/constraint-mapping"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://symfony.com/schema/dic/constraint-mapping http://symfony.com/schema/dic/constraint-mapping/constraint-mapping-1.0.xsd">
<class name="Acme\SubscriptionBundle\Entity\Transaction">
<property name="cardNumber">
<constraint name="Luhn">
<option name="message">Please check your credit card number.</option>
</constraint>
</property>
</class>
</constraint-mapping>
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17
// src/Acme/SubscriptionBundle/Entity/Transaction.php
namespace Acme\SubscriptionBundle\Entity\Transaction;
use Symfony\Component\Validator\Mapping\ClassMetadata;
use Symfony\Component\Validator\Constraints as Assert;
class Transaction
{
protected $cardNumber;
public static function loadValidatorMetadata(ClassMetadata $metadata)
{
$metadata->addPropertyConstraint('cardNumber', new Assert\Luhn(array(
'message' => 'Please check your credit card number',
)));
}
}
Available Options
message
type: string
default: Invalid card number.
The default message supplied when the value does not pass the Luhn check.