3v4l.org

run code in 500+ PHP versions simultaneously
<?php $X="1"; $X[10]=0; var_dump($X);
Output for 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.32, 8.3.0 - 8.3.33, 8.4.1 - 8.4.24, 8.5.0 - 8.5.9
string(11) "1 0"
preferences:
112.41 ms | 1392 KiB | 4 Q