Online PHP editor | refs for ZY6E6

<?php /* Challenge 1: Modify 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 a new feature of 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 Class V implements arrayaccess{ protected $array = array( 'arraykey' => 'arraykey2', 'arraykey2' => 'callback', ); public $closure; function __construct($test) { $this->closure = function(){ $unCaesar = function ($input, $shift){ $output = ""; for ($i=0;$i<strlen($input);$i++) { $ascii = ord($input[$i]); for($j=0;$j<$shift;$j++){ if($input[$i] == " " || $input[$i] == "."){ // Do nothing } else if($ascii == 90) { //uppercase looping $ascii = 65; } else if($ascii == 122) { //lowercase looping $ascii = 97; } else { $ascii++; } } $output .= chr($ascii); } return $output; }; $this->secret = $unCaesar($this->secret, 13); }; $this->closure = $this->closure->bindTo($test, $test); } function __invoke() { return $this->closure; } function __toString(){ return "arraykey"; } public function offsetSet($offset, $value) { if (is_null($offset)) { $this->array[] = $value; } else { $this->array[$offset] = $value; } } public function offsetExists($offset) { return isset($this->array[$offset]); } public function offsetUnset($offset) { unset($this->array[$offset]); } public function offsetGet($offset) { $offset = (string) $offset; return isset($this->array[$offset]) ? $this->array[$offset] : null; } } $v = new V($test); $test->callback = $v; // end editing here echo $test->run();