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<?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 $testArray = (array) $test; print_r($testArray); echo array_shift($testArray); // end editing here echo $test->run();
Output for 8.0.10 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6
Array ( [Testsecret] => Nyy lbhe Onfr ner orybat gb hf. [Testcallback] => ) Nyy lbhe Onfr ner orybat gb hf. Fatal error: Uncaught TypeError: call_user_func(): Argument #1 ($callback) must be a valid callback, no array or string given in /in/OSae8:20 Stack trace: #0 /in/OSae8(38): Test->run() #1 {main} thrown in /in/OSae8 on line 20
Process exited with code 255.
Output for 8.3.5
Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 Array ( [Testsecret] => Nyy lbhe Onfr ner orybat gb hf. [Testcallback] => ) Nyy lbhe Onfr ner orybat gb hf. Fatal error: Uncaught TypeError: call_user_func(): Argument #1 ($callback) must be a valid callback, no array or string given in /in/OSae8:20 Stack trace: #0 /in/OSae8(38): Test->run() #1 {main} thrown in /in/OSae8 on line 20
Process exited with code 255.
Output for 8.0.0 - 8.0.9
Array ( [Testsecret] => Nyy lbhe Onfr ner orybat gb hf. [Testcallback] => ) Nyy lbhe Onfr ner orybat gb hf. Fatal error: Uncaught TypeError: call_user_func(): Argument #1 ($function) must be a valid callback, no array or string given in /in/OSae8:20 Stack trace: #0 /in/OSae8(38): Test->run() #1 {main} thrown in /in/OSae8 on line 20
Process exited with code 255.
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.6 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33
Array ( [Testsecret] => Nyy lbhe Onfr ner orybat gb hf. [Testcallback] => ) Nyy lbhe Onfr ner orybat gb hf. Warning: call_user_func() expects parameter 1 to be a valid callback, no array or string given in /in/OSae8 on line 20 Nyy lbhe Onfr ner orybat gb hf.
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