3v4l.org

run code in 300+ PHP versions simultaneously
<?php $data = 1; $length = 5; $text = substr( base64_encode( $data . microtime() ), 0, $length ); echo $text;
Output for 5.5.24 - 5.5.25, 5.5.27, 5.5.29 - 5.5.30, 5.5.35, 5.6.10 - 5.6.11, 5.6.13, 5.6.16, 5.6.20, 5.6.28, 7.0.0 - 7.0.3, 7.0.20, 7.1.0 - 7.1.7, 7.2.0
MTAuM
Output for 5.5.28, 5.5.33 - 5.5.34, 5.6.8 - 5.6.9, 5.6.12, 5.6.14 - 5.6.15, 5.6.17 - 5.6.19, 5.6.21, 7.0.5 - 7.0.6
MTAuN
Output for 5.5.26, 5.5.31 - 5.5.32, 7.0.4
MTAuO
preferences:
80.08 ms | 402 KiB | 45 Q