3v4l.org

run code in 300+ PHP versions simultaneously
<?php var_export( substr_compare('abcd', 'f', 0, 4) );
Output for 8.1.32 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0 - 8.5.3
-5
preferences:
48.68 ms | 841 KiB | 4 Q