3v4l.org

run code in 300+ PHP versions simultaneously
<?php var_dump(str_increment('AA')); var_dump(str_increment('AA', 1)); // expected: 'AB' var_dump(str_increment('AA', 3)); // expected: 'AD' var_dump(str_decrement('AA')); var_dump(str_increment('AA', -1)); // expected: 'Z'

Here you find the average performance (time & memory) of each version. A grayed out version indicates it didn't complete successfully (based on exit-code).

VersionSystem time (s)User time (s)Memory (MiB)
8.4.130.0140.00617.65
8.4.120.0140.00717.90
8.4.110.0150.00617.84
8.4.90.0080.01117.71
8.3.260.0100.00816.61
8.3.250.0120.00816.35
8.3.240.0100.01016.57
8.3.180.0100.00916.53
8.3.50.0110.00416.66
preferences:
33.06 ms | 403 KiB | 5 Q