3v4l.org

run code in 300+ PHP versions simultaneously
<?php class c1 { const ZERO = 0; const ONE = 1; public static $a1 = array(self::ONE => 'one'); public static $a2 = array(self::ZERO => 'zero'); } $v1 = c1::$a1; $v2 = c1::$a2; $v1[] = 1; $v2[] = 1; var_dump($v1); var_dump($v2);

preferences:
35.07 ms | 402 KiB | 5 Q