3v4l.org

run code in 300+ PHP versions simultaneously
<?php class Foo{ public function __call($n,$a){ return $this->$n->call($this,$a); } } $f=new Foo(); $f->b=function($x){echo$x;}; var_dump($f->b(7));
Output for 8.2.0 - 8.2.18, 8.3.0 - 8.3.7
Deprecated: Creation of dynamic property Foo::$b is deprecated in /in/XTKSc on line 9 Warning: Array to string conversion in /in/XTKSc on line 9 ArrayNULL
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28
Warning: Array to string conversion in /in/XTKSc on line 9 ArrayNULL
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 7.3.31, 7.4.0 - 7.4.33
Notice: Array to string conversion in /in/XTKSc on line 9 ArrayNULL
Output for 7.3.32 - 7.3.33
ArrayNULL
Output for 5.5.24 - 5.5.35, 5.6.8 - 5.6.28
Fatal error: Call to undefined method Closure::call() in /in/XTKSc on line 5
Process exited with code 255.

preferences:
125.83 ms | 402 KiB | 184 Q