Online PHP editor | refs for oH5BS

<?php /* Challenge 1: Read and write to Test::$secret before it's output. Rules:: 1. No use of Reflection API / runkit extension 2. No stopping execution before Test::run() 3. No Exceptions or PHP errors / warnings notices allowed 4. No redefining $test Hints: 1. Caesar 2. Magic methods 3. Requires something that became available in PHP 5.4 */ class Test { private $secret = 'Nyy lbhe Onfr ner orybat gb hf.'; private $callback; final public function run() { call_user_func($this->callback); return $this->secret . PHP_EOL; } public function __set($k, $v) { $key = $v[($v[$v])]; // $v is some kind of weird array $value = $v(); // and a callback! $this->{$key} = $value; } } $test = new Test; // start editing here $testArr = (array) $test; var_dump($testArr); echo $testArr['Testsecret']; class Obj implements ArrayAccess { private $t; public function __construct($t) { $this->t = $t; return; } public function offsetSet($offset, $value) { return; } public function offsetExists($offset) { return; } public function offsetUnset($offset) { return; } public function offsetGet($offset) { return 'callback'; } public function __invoke() { $tObj = $this->t; return (function($tObj) { print_r($t); }); } } $obj = new Obj($test); $test->x = $obj; // end editing here echo $test->run();