/** Checks the string value against the sandbox function whitelists and blacklists for callback violations
* @return mixed|null
*/
public function __invoke()
{
if ($this->sandbox->checkFunc($this->value)) {
$name = strtolower($this->value);
if (in_array($name, PHPSandbox::$defined_funcs) && $this->sandbox->overwrite_defined_funcs || in_array($name, PHPSandbox::$sandboxed_string_funcs) && $this->sandbox->overwrite_sandboxed_string_funcs || in_array($name, PHPSandbox::$arg_funcs) && $this->sandbox->overwrite_func_get_args) {
return call_user_func_array([$this->sandbox, '_' . $this->value], func_get_args());
}
return call_user_func_array($name, func_get_args());
}
return '';
}
