3v4l.org

run code in 500+ PHP versions simultaneously
<?php const C = [1, 2, 3]; function foo(): array { return C; } foo()[] = 4; var_dump(C);
Output for 8.3.5 - 8.3.31, 8.4.9 - 8.4.22, 8.5.1 - 8.5.7
array(3) { [0]=> int(1) [1]=> int(2) [2]=> int(3) }
preferences:
48.85 ms | 559 KiB | 4 Q