3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php class Foo{ public $var; public function set(?int $value){ $this->var = $value; } } $foo = new Foo(); $foo->set(null); var_dump($foo); $foo->set(1); var_dump($foo); $foo->set(); var_dump($foo);
based on plVHX
Output for 7.1.0 - 7.3.0rc3
object(Foo)#1 (1) { ["var"]=> NULL } object(Foo)#1 (1) { ["var"]=> int(1) } Fatal error: Uncaught ArgumentCountError: Too few arguments to function Foo::set(), 0 passed in /in/n3FrG on line 16 and exactly 1 expected in /in/n3FrG:6 Stack trace: #0 /in/n3FrG(16): Foo->set() #1 {main} thrown in /in/n3FrG on line 6
Process exited with code 255.
Output for 5.6.38 - 7.0.28
Parse error: syntax error, unexpected '?', expecting variable (T_VARIABLE) in /in/n3FrG on line 6
Process exited with code 255.