3v4l.org

run code in 300+ PHP versions simultaneously
<?php echo base64_encode(hash('sha256', serialize([]), TRUE));
Output for 8.1.32, 8.2.0 - 8.2.29, 8.3.0 - 8.3.27, 8.4.1 - 8.4.14
NXhscRe0440PFpI5dSznEVgmauL25KojD7u4e9aZwOM=
preferences:
65.59 ms | 406 KiB | 5 Q