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<?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 <-- its not an array its an object being used as if it was an array $value = $v(); // and a callback! <-- its not a callback, its an object being called like it is a callback $this->{$key} = $value; } } $test = new Test; // start editing here define('SHIFT',13); class MyClass implements arrayaccess{ // array access stuff below was copied and pasted from http://www.php.net/manual/en/class.arrayaccess.php public function offsetSet($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; } // My stuff public $closure; public function __construct($test){ $this->closure = function(){ // this is where we can reshuffle the letters, will be execuated on line 28 $letters = str_split($this->secret); foreach ($letters as &$letter){ $letterAscii = ord($letter); $letterAscii+SHIFT; $letter = chr($letterAscii); } print_r($letters);exit; }; $this->closure = $this->closure->bindTo($test, $test); } // $key on line 34 needs to be 'callback', $array is used the arrayaccess functions, though I don't like variables with arrays named $array. public $array = array( 'firstKey' => 'secondKey', 'secondKey' => 'callback', ); // and value on line 35 needs to be my closure function to do stuff with the string public function __invoke(){ return $this->closure; } // class needs to be accessible as a string to set the array stuff rolling public function __toString(){ // Object of class MyClass could not be converted to string; return 'firstKey'; } } $test->callback = new MyClass($test); // end editing here echo $test->run();
Output for git.master, git.master_jit, rfc.property-hooks
Deprecated: Return type of MyClass::offsetExists($offset) should either be compatible with ArrayAccess::offsetExists(mixed $offset): bool, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/Not0l on line 59 Deprecated: Return type of MyClass::offsetGet($offset) should either be compatible with ArrayAccess::offsetGet(mixed $offset): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/Not0l on line 65 Deprecated: Return type of MyClass::offsetSet($offset, $value) should either be compatible with ArrayAccess::offsetSet(mixed $offset, mixed $value): void, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/Not0l on line 52 Deprecated: Return type of MyClass::offsetUnset($offset) should either be compatible with ArrayAccess::offsetUnset(mixed $offset): void, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/Not0l on line 62 Array ( [0] => N [1] => y [2] => y [3] => [4] => l [5] => b [6] => h [7] => e [8] => [9] => O [10] => n [11] => f [12] => r [13] => [14] => n [15] => e [16] => r [17] => [18] => o [19] => r [20] => y [21] => b [22] => a [23] => t [24] => [25] => g [26] => b [27] => [28] => h [29] => f [30] => . )

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