3v4l.org

run code in 300+ PHP versions simultaneously
<?php declare(strict_types = 1); $r = new class() { public int $int; public float $float; public bool $bool; public array $array; public string $string; public stdClass $std; public function __construct(){ var_dump($this->string); echo $this->string += 10; var_dump($this->string); } }; var_dump($r); $foo = null; $foo .= "baz"; var_dump($foo);
Output for 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.27, 8.4.1 - 8.4.14
Fatal error: Uncaught Error: Typed property class@anonymous::$string must not be accessed before initialization in /in/pFd1t:12 Stack trace: #0 /in/pFd1t(3): class@anonymous->__construct() #1 {main} thrown in /in/pFd1t on line 12
Process exited with code 255.
Output for 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33
Parse error: syntax error, unexpected 'int' (T_STRING), expecting function (T_FUNCTION) or const (T_CONST) in /in/pFd1t on line 4
Process exited with code 255.
Output for 7.0.0 - 7.0.33
Parse error: syntax error, unexpected 'int' (T_STRING), expecting variable (T_VARIABLE) in /in/pFd1t on line 4
Process exited with code 255.
Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.40
Warning: Unsupported declare 'strict_types' in /in/pFd1t on line 1 Parse error: syntax error, unexpected 'class' (T_CLASS) in /in/pFd1t on line 3
Process exited with code 255.
preferences:
45.28 ms | 410 KiB | 5 Q