WorkflowBundle/Validator/Constraints/ContainsYamlValidator.php

<?php
namespace WorkflowBundle\Validator\Constraints;

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

class ContainsYamlValidator extends ConstraintValidator
{
    public function validate($value, Constraint $constraint)
    {
        $yaml = Yaml::dump($value,100,2);

        
        
        
        
        // if (!preg_match('/^[a-zA-Z0-9]+$/', $value, $matches)) {
        //     $this->context->buildViolation($constraint->message)
        //         ->setParameter('%string%', $value)
        //         ->addViolation();
        // }
    }
}