3v4l.org

run code in 300+ PHP versions simultaneously
<?php const FOO=1; class bar { static $v = [ FOO => 1, FOOX => 1, ]; static $w; } // If following line is commentted out, undefined constant error disappears. //var_dump(bar::$w);
Output for 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.31, 7.4.0 - 7.4.25, 8.0.0 - 8.0.12, 8.1rc1 - rc3

preferences:
49.89 ms | 528 KiB | 12 Q