3v4l.org

run code in 500+ PHP versions simultaneously
<?php // echo A::A; // Undefined constant "B" define('B', 'yes'); class A { public const A = B; } echo A::A; // yes ?>
Output for 8.1.34, 8.2.0 - 8.2.31, 8.3.0 - 8.3.31, 8.4.1 - 8.4.22, 8.5.0 - 8.5.7
yes
preferences:
52.14 ms | 860 KiB | 4 Q