Online PHP editor | refs for 9cZFV

<?php $refVariable = false; $refName = 'refVariable'; $callback = function() use (&$refVariable) {}; $function = new \ReflectionFunction($callback); $staticVariables = $function->getStaticVariables(); var_dump(array_key_exists($refName, $staticVariables)); var_dump($refVariable); $staticVariables[$refName] = true; var_dump($refVariable);