Validador de RUT Chileno en Symfony 2http://symfony.com/doc/current/cookbook/validation/custom_constraint.html

Entity.php

<?php

/*
 *
 * (c) Gonzalo Moreno C. <goncab380<at>hotmail.com>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Vendor\YourBundle\Entity;

use Doctrine\ORM\Mapping as ORM;
use Vendor\YourBundle\Validator\Constraints as MyAssert;
use Symfony\Component\Validator\Constraints as Assert;


/**
 * Business
 *
 * @ORM\Table(name="table")
 */
class Entity
{

    /**
     * @var string
     * @ORM\Column(name="rut", type="string", length=10)
     * @MyAssert\Rut()
     */
    private $rut;

    /**
     * Set rut
     *
     * @param string $rut
     * @return Entity
     */
    public function setRut($rut)
    {
        $this->rut = $rut;
    
        return $this;
    }

    /**
     * Get rut
     *
     * @return string 
     */
    public function getRut()
    {
        return $this->rut;
    }
}

Rut.php

<?php 
/*
 *
 * (c) Gonzalo Moreno C. <[email protected]>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Vendor\YourBundle\Validator\Constraints;

use Symfony\Component\Validator\Constraint;
use Symfony\Component\Validator\Exception\MissingOptionsException;
 
/**
 * @Annotation
 */
class Rut extends Constraint
{
    public $message = 'Este valor no es un RUT valido';
    
    public function __construct($options = null)
    {
        parent::__construct($options);
    }
}

RutValidator.php

<?php

/*
 *
 * (c) Gonzalo Moreno C. <[email protected]>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Vendor\YourBundle\Validator\Constraints;

use Symfony\Component\Validator\Constraint;
use Symfony\Component\Validator\ConstraintValidator;

class RutValidator extends ConstraintValidator
{
    /**
     * {@inheritDoc}
     */
    public function validate($value, Constraint $constraint)
    {
        $r = strtoupper(str_replace(array(".", "-"), "", $value));
        $sub_rut = substr($r, 0, strlen($r) - 1);
        $sub_dv = substr($r, - 1);
        $x = 2;
        $s = 0;
        for ($i = strlen($sub_rut) - 1; $i >= 0; $i--) {
            if ($x > 7) {
                $x = 2;
            }
            $s += $sub_rut[$i] * $x;
            $x++;
        }
        $dv = 11 - ($s % 11);
        if ($dv == 10) {
            $dv = 'K';
        }
        if ($dv == 11) {
            $dv = '0';
        }
        if ($dv != $sub_dv) {
            $this->context->addViolation($constraint->message, array('%string%' => $value));
        }
    }

}