nineskeletor/src/Validator/PasswordValidator.php

<?php

namespace App\Validator;

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

/**
 * @Annotation
 */
class PasswordValidator extends ConstraintValidator
{
    public function validate($value, Constraint $constraint)
    {
        if (!empty($value)) {
            if (strlen($value) < '8') {
                $this->context->addViolation($constraint->message);
            } elseif (!preg_match('#[0-9]+#', $value)) {
                $this->context->addViolation($constraint->message);
            } elseif (!preg_match('#[a-zA-Z]+#', $value)) {
                $this->context->addViolation($constraint->message);
            } elseif (!preg_match("/[|!@#$%&*\/=?,;.:\-_+~^\\\]/", $value)) {
                $this->context->addViolation($constraint->message);
            }
        }
    }
}