3v4l.org

run code in 300+ PHP versions simultaneously
<?php class Number { private $v = 0; public function __construct($v) { $this->v = $v; } public function mul() { return function ($x) { return $this->v * $x; }; } } $one = new Number(1); $two = new Number(2); $double = $two->mul()->bindTo($one); echo $double(5);
Output for 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.34, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.7
5
preferences:
194.97 ms | 404 KiB | 301 Q