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run code in 300+ PHP versions simultaneously
<?php class A { private static self $singleton; public function __construct() { if(!isset(self::$singleton)) { self::$singleton = $this; } return self::$singleton; } } $a = new A; $b = new A; $c = new A; var_dump($a); var_dump($b); var_dump($c); var_dump($a->__construct());
Output for git.master, git.master_jit, rfc.property-hooks
object(A)#1 (0) { } object(A)#2 (0) { } object(A)#3 (0) { } object(A)#1 (0) { }

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