Apply Mask

MaskExtension.php

<?php
// src/AppBundle/Twig/MaskExtension.php
namespace AppBundle\Twig;

class MaskExtension
{
  public function mask($value, $mask)
  {
    $maskared = '';
    $value = (string) $value;
    $k = 0;

    for($i = 0; $i<=strlen($mask)-1; $i++){
      if($mask[$i] == '#'){
        if(isset($value[$k]))
          $maskared .= $value[$k++];
      }
      else{
        if(isset($mask[$i]))
          $maskared .= $mask[$i];
      }
    }
    return $maskared;
  }
}