3v4l.org

run code in 300+ PHP versions simultaneously
<?php var_export( substr_compare('abcd', 'f', 0, 4) );
Output for 8.1.32, 8.2.0 - 8.2.28, 8.3.0 - 8.3.22, 8.4.1 - 8.4.8
-5
preferences:
41.59 ms | 406 KiB | 5 Q