3v4l.org

run code in 300+ PHP versions simultaneously
<?php class Foo { public $i = 0; public function method() { return $this->i++; } } $short = [0, 1, 2]; $long = [0, 1, 2]; $foo1 = new Foo(); $foo2 = new Foo(); $long[$foo1->method()] = $long[$foo1->method()] + 1; $short[$foo2->method()] += 1; var_dump($long, $short);
Output for 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 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 - 8.2.19, 8.3.0 - 8.3.7
array(3) { [0]=> int(2) [1]=> int(1) [2]=> int(2) } array(3) { [0]=> int(1) [1]=> int(1) [2]=> int(2) }
preferences:
207.55 ms | 404 KiB | 293 Q