3v4l.org

run code in 200+ php & hhvm versions
<?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 5.6.0 - 5.6.30, hhvm-3.18.5 - 3.22.0, 7.0.0 - 7.3.1