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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 $value = $v(); // and a callback! $this->{$key} = $value; } } $test = new Test; // start editing here Class V implements arrayaccess{ $this->array = array( 'arraykey' => 'arraykey2', 'arraykey2' => 'callback', ); function __invoke() { return function(){ $this->secret = "I beat the mammoth!"; }; } function __toString(){ return "arraykey"; } } $test->callback = new V; // end editing here echo $test->run();
Output for 5.4.0 - 5.4.27
Parse error: syntax error, unexpected '$this' (T_VARIABLE), expecting function (T_FUNCTION) in /in/9siFq on line 47
Process exited with code 255.
Output for 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.28
Parse error: syntax error, unexpected T_VARIABLE, expecting T_FUNCTION in /in/9siFq on line 47
Process exited with code 255.
Output for 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_VARIABLE, expecting T_FUNCTION in /in/9siFq on line 47
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/9siFq 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/9siFq 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/9siFq on line 22
Process exited with code 255.

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