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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 $testArr = (array) $test; var_dump($testArr); echo $testArr['Testsecret']; class Obj implements ArrayAccess { private $t; public function __construct($t) { $this->t = $t; return; } public function offsetSet($offset, $value) { return; } public function offsetExists($offset) { return; } public function offsetUnset($offset) { return; } public function offsetGet($offset) { return 'callback'; } public function __invoke() { $tObj = $this->t; return (function($tObj) { print_r($t); }); } } $obj = new Obj($test); $test->x = $obj; // end editing here echo $test->run();
Output for 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6
array(2) { ["Testsecret"]=> string(31) "Nyy lbhe Onfr ner orybat gb hf." ["Testcallback"]=> NULL } Warning: Undefined array key "Testsecret" in /in/oH5BS on line 35 Deprecated: Return type of Obj::offsetExists($offset) should either be compatible with ArrayAccess::offsetExists(mixed $offset): bool, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/oH5BS on line 44 Deprecated: Return type of Obj::offsetGet($offset) should either be compatible with ArrayAccess::offsetGet(mixed $offset): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/oH5BS on line 47 Deprecated: Return type of Obj::offsetSet($offset, $value) should either be compatible with ArrayAccess::offsetSet(mixed $offset, mixed $value): void, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/oH5BS on line 43 Deprecated: Return type of Obj::offsetUnset($offset) should either be compatible with ArrayAccess::offsetUnset(mixed $offset): void, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/oH5BS on line 45 Fatal error: Uncaught ArgumentCountError: Too few arguments to function Obj::{closure}(), 0 passed in /in/oH5BS on line 20 and exactly 1 expected in /in/oH5BS:53 Stack trace: #0 /in/oH5BS(20): Obj->{closure}() #1 /in/oH5BS(62): Test->run() #2 {main} thrown in /in/oH5BS on line 53
Process exited with code 255.
Output for 8.3.5
Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 array(2) { ["Testsecret"]=> string(31) "Nyy lbhe Onfr ner orybat gb hf." ["Testcallback"]=> NULL } Warning: Undefined array key "Testsecret" in /in/oH5BS on line 35 Deprecated: Return type of Obj::offsetExists($offset) should either be compatible with ArrayAccess::offsetExists(mixed $offset): bool, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/oH5BS on line 44 Deprecated: Return type of Obj::offsetGet($offset) should either be compatible with ArrayAccess::offsetGet(mixed $offset): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/oH5BS on line 47 Deprecated: Return type of Obj::offsetSet($offset, $value) should either be compatible with ArrayAccess::offsetSet(mixed $offset, mixed $value): void, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/oH5BS on line 43 Deprecated: Return type of Obj::offsetUnset($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/oH5BS on line 45 Fatal error: Uncaught ArgumentCountError: Too few arguments to function Obj::{closure}(), 0 passed in /in/oH5BS on line 20 and exactly 1 expected in /in/oH5BS:53 Stack trace: #0 /in/oH5BS(20): Obj->{closure}() #1 /in/oH5BS(62): Test->run() #2 {main} thrown in /in/oH5BS on line 53
Process exited with code 255.
Output for 8.0.0 - 8.0.30
array(2) { ["Testsecret"]=> string(31) "Nyy lbhe Onfr ner orybat gb hf." ["Testcallback"]=> NULL } Warning: Undefined array key "Testsecret" in /in/oH5BS on line 35 Fatal error: Uncaught ArgumentCountError: Too few arguments to function Obj::{closure}(), 0 passed in /in/oH5BS on line 20 and exactly 1 expected in /in/oH5BS:53 Stack trace: #0 /in/oH5BS(20): Obj->{closure}() #1 /in/oH5BS(62): Test->run() #2 {main} thrown in /in/oH5BS on line 53
Process exited with code 255.
Output for 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.31, 7.4.0 - 7.4.33
array(2) { ["Testsecret"]=> string(31) "Nyy lbhe Onfr ner orybat gb hf." ["Testcallback"]=> NULL } Notice: Undefined index: Testsecret in /in/oH5BS on line 35 Fatal error: Uncaught ArgumentCountError: Too few arguments to function Obj::{closure}(), 0 passed in /in/oH5BS on line 20 and exactly 1 expected in /in/oH5BS:53 Stack trace: #0 /in/oH5BS(20): Obj->{closure}() #1 /in/oH5BS(62): Test->run() #2 {main} thrown in /in/oH5BS on line 53
Process exited with code 255.
Output for 7.3.32 - 7.3.33
array(2) { ["Testsecret"]=> string(31) "Nyy lbhe Onfr ner orybat gb hf." ["Testcallback"]=> NULL } Fatal error: Uncaught ArgumentCountError: Too few arguments to function Obj::{closure}(), 0 passed in /in/oH5BS on line 20 and exactly 1 expected in /in/oH5BS:53 Stack trace: #0 /in/oH5BS(20): Obj->{closure}() #1 /in/oH5BS(62): Test->run() #2 {main} thrown in /in/oH5BS on line 53
Process exited with code 255.
Output for 7.0.0 - 7.0.33
array(2) { ["Testsecret"]=> string(31) "Nyy lbhe Onfr ner orybat gb hf." ["Testcallback"]=> NULL } Notice: Undefined index: Testsecret in /in/oH5BS on line 35 Warning: Missing argument 1 for Obj::{closure}(), called in /in/oH5BS on line 20 and defined in /in/oH5BS on line 53 Notice: Undefined variable: t in /in/oH5BS on line 53 Nyy lbhe Onfr ner orybat gb hf.
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.38
array(2) { ["Testsecret"]=> string(31) "Nyy lbhe Onfr ner orybat gb hf." ["Testcallback"]=> NULL } Notice: Undefined index: Testsecret in /in/oH5BS on line 35 Warning: Missing argument 1 for Obj::{closure}() in /in/oH5BS on line 53 Notice: Undefined variable: t in /in/oH5BS on line 53 Nyy lbhe Onfr ner orybat gb hf.
Output for 5.3.0 - 5.3.29
array(2) { ["Testsecret"]=> string(31) "Nyy lbhe Onfr ner orybat gb hf." ["Testcallback"]=> NULL } Notice: Undefined index: Testsecret in /in/oH5BS on line 35 Warning: Missing argument 1 for {closure}() in /in/oH5BS on line 53 Notice: Undefined variable: t in /in/oH5BS on line 53 Nyy lbhe Onfr ner orybat gb hf.
Output for 5.1.0 - 5.1.6, 5.2.0 - 5.2.17
Parse error: syntax error, unexpected T_FUNCTION in /in/oH5BS on line 53
Process exited with code 255.
Output for 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_FUNCTION in /in/oH5BS on line 53
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/oH5BS on line 16
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/oH5BS on line 16
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/oH5BS on line 16
Process exited with code 255.
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