3v4l.org

run code in 300+ PHP versions simultaneously
<?php class Controller { public function __construct(B $b) { $this->b = $b; } } class B { public function __construct(C $c) { $this->c = $c; } } class C { public function __construct(Guzzle $guzzle) { $this->guzzle = $guzzle; } } class Guzzle { public function __construct() { } } $getReflectedConstructorParams = function($className) { return (new ReflectionClass($className))->getConstructor()->getParameters(); }; $className = 'Controller'; $graph = []; // I hate recursion, there's much better ways while (true) { $params = $getReflectedConstructorParams($className); // Guard clause if (!isset($params[0])) { // We'll have reached the Guzzle object here, the last one in the chain $prevObj = null; foreach ($graph as $obj) { // This will only happen once if ($prevObj === null) { $prevObj = new $obj; continue; } $prevObj = new $obj($prevObj); var_dump($prevObj); die; } var_dump($prevObj); break; } $className = $params[0]->getClass()->getName(); $graph[] = $className; } var_dump($graph);
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6
Deprecated: Method ReflectionParameter::getClass() is deprecated in /in/UJktq on line 44 Deprecated: Method ReflectionParameter::getClass() is deprecated in /in/UJktq on line 44 Deprecated: Method ReflectionParameter::getClass() is deprecated in /in/UJktq on line 44 Fatal error: Uncaught ArgumentCountError: Too few arguments to function B::__construct(), 0 passed in /in/UJktq on line 30 and exactly 1 expected in /in/UJktq:4 Stack trace: #0 /in/UJktq(30): B->__construct() #1 {main} thrown in /in/UJktq on line 4
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 Deprecated: Method ReflectionParameter::getClass() is deprecated in /in/UJktq on line 44 Deprecated: Method ReflectionParameter::getClass() is deprecated in /in/UJktq on line 44 Deprecated: Method ReflectionParameter::getClass() is deprecated in /in/UJktq on line 44 Fatal error: Uncaught ArgumentCountError: Too few arguments to function B::__construct(), 0 passed in /in/UJktq on line 30 and exactly 1 expected in /in/UJktq:4 Stack trace: #0 /in/UJktq(30): B->__construct() #1 {main} thrown in /in/UJktq on line 4
Process exited with code 255.
Output for 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33
Fatal error: Uncaught ArgumentCountError: Too few arguments to function B::__construct(), 0 passed in /in/UJktq on line 30 and exactly 1 expected in /in/UJktq:4 Stack trace: #0 /in/UJktq(30): B->__construct() #1 {main} thrown in /in/UJktq on line 4
Process exited with code 255.
Output for 7.0.0 - 7.0.20
Fatal error: Uncaught TypeError: Argument 1 passed to B::__construct() must be an instance of C, none given, called in /in/UJktq on line 30 and defined in /in/UJktq:4 Stack trace: #0 /in/UJktq(30): B->__construct() #1 {main} thrown in /in/UJktq on line 4
Process exited with code 255.
Output for 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.21
Catchable fatal error: Argument 1 passed to B::__construct() must be an instance of C, none given, called in /in/UJktq on line 30 and defined in /in/UJktq on line 4
Process exited with code 255.
preferences:
186.83 ms | 402 KiB | 226 Q