TwigSandboxPolicy::checkMethodAllowed

public TwigSandboxPolicy::checkMethodAllowed($obj, $method)

public function checkMethodAllowed($obj, $method) {
  foreach ($this->whitelisted_classes as $class => $key) {
    if ($obj instanceof $class) {
      return TRUE;
    }
  }

  // Return quickly for an exact match of the method name.
  if (isset($this->whitelisted_methods[$method])) {
    return TRUE;
  }

  // If the method name starts with a whitelisted prefix, allow it.
  // Note: strpos() is between 3x and 7x faster than preg_match in this case.
  foreach ($this->whitelisted_prefixes as $prefix) {
    if (strpos($method, $prefix) === 0) {
      return TRUE;
    }
  }

  throw new \Twig_Sandbox_SecurityError(sprintf('Calling "%s" method on a "%s" object is not allowed.', $method, get_class($obj)));
}