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run code in 300+ PHP versions simultaneously
<?php class foo { private $fn; function __construct() { $this->reg(function () { $this->bar(); }); } private function reg(callable $x) { $this->fn = $x; } public function baz() { $this->fn(); } private function bar() { echo 'bar'; } } $foo = new foo; $foo->baz();
Output for 7.0.0 - 7.0.20, 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 - 8.2.18, 8.3.0 - 8.3.6
Fatal error: Uncaught Error: Call to undefined method foo::fn() in /in/scgL8:19 Stack trace: #0 /in/scgL8(29): foo->baz() #1 {main} thrown in /in/scgL8 on line 19
Process exited with code 255.
Output for 5.5.24 - 5.5.35, 5.6.8 - 5.6.28
Fatal error: Call to undefined method foo::fn() in /in/scgL8 on line 19
Process exited with code 255.
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