3v4l.org

run code in 300+ PHP versions simultaneously
<?php echo base64_encode('hello' . ':' . 'how are you?');
Output for 7.4.0 - 7.4.33, 8.0.1 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.25, 8.4.1 - 8.4.12
aGVsbG86aG93IGFyZSB5b3U/
preferences:
104.91 ms | 406 KiB | 5 Q