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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 echo $key;exit; $value = $v(); // and a callback! $this->{$key} = $value; } } $test = new Test; // start editing here class MyClass implements arrayaccess{ public $array = array( 'a' => 'b', 'b' => 'callback', ); public $closure; public function __construct($test){ $this->closure = function(){ echo 'nearly there! just need to reshuffle the letters now, can set secret too as its not in scope.'; }; $this->closure = $this->closure->bindTo($test); // I dont really understand what this is doing } public function __toString(){ // Object of class V could not be converted to string; return 'a'; } // 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; } } $test->callback = new MyClass($test); // end editing here echo $test->run();
Output for 8.1.24 - 8.1.27, 8.2.11 - 8.2.17, 8.3.0 - 8.3.4
Deprecated: Return type of MyClass::offsetExists($offset) should either be compatible with ArrayAccess::offsetExists(mixed $offset): bool, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/7OeZE on line 79 Deprecated: Return type of MyClass::offsetGet($offset) should either be compatible with ArrayAccess::offsetGet(mixed $offset): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/7OeZE on line 85 Deprecated: Return type of MyClass::offsetSet($offset, $value) should either be compatible with ArrayAccess::offsetSet(mixed $offset, mixed $value): void, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/7OeZE on line 72 Deprecated: Return type of MyClass::offsetUnset($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/7OeZE on line 82 callback
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.31, 5.6.34 - 5.6.39, 7.0.0 - 7.0.11, 7.0.13, 7.0.16 - 7.0.30, 7.0.32 - 7.0.33, 7.1.0 - 7.1.1, 7.1.3 - 7.1.16, 7.1.21 - 7.1.26, 7.1.28 - 7.1.33, 7.2.0 - 7.2.3, 7.2.6, 7.2.10 - 7.2.12, 7.2.16 - 7.2.25, 7.3.0, 7.3.2 - 7.3.13, 7.4.1
callback
Output for 5.6.32 - 5.6.33, 5.6.40, 7.0.12, 7.0.14 - 7.0.15, 7.0.31, 7.1.2, 7.1.17 - 7.1.20, 7.1.27, 7.2.4 - 7.2.5, 7.2.7 - 7.2.9, 7.2.13 - 7.2.15, 7.2.26, 7.3.1, 7.4.0

Process exited with code 137.
Output for 5.3.0 - 5.3.29
Fatal error: Call to undefined method Closure::bindTo() in /in/7OeZE on line 61
Process exited with code 255.
Output for 5.1.0 - 5.1.6, 5.2.0 - 5.2.17
Parse error: syntax error, unexpected T_FUNCTION in /in/7OeZE on line 58
Process exited with code 255.
Output for 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_FUNCTION in /in/7OeZE on line 58
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/7OeZE on line 22
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1
Parse error: parse error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/7OeZE on line 22
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `T_OLD_FUNCTION' or `T_FUNCTION' or `T_VAR' or `'}'' in /in/7OeZE on line 22
Process exited with code 255.

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