TwigExtension : rot13

Twig/TwigExtension.php

                 new TwigFilter('sov_cache', [$this, 'sovCache']),
                 new TwigFilter('slugify', [$this, 'slugify']),
                 new TwigFilter('md5', [$this, 'md5']),
+                new TwigFilter('rot13', [$this, 'rot13']),
         ];
     }
 
+    public function rot13(string $string): string
+    {
+        return str_rot13($string);
+    }
+
     public function isInstanceOf(EntityInterface $entity, string $interfaceName)
     {
         $reflection = new \ReflectionClass($entity);