3v4l.org

run code in 300+ PHP versions simultaneously
<?php $string = "A"; echo substr($string, 0); ?>
Output for 4.3.0, 5.3.29, 5.4.25 - 5.4.45, 5.5.24 - 5.5.35, 5.6.7 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.12 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
A
preferences:
187.3 ms | 404 KiB | 209 Q