3v4l.org

run code in 300+ PHP versions simultaneously
<?php namespace my; function ini_set() { echo 123; } echo "namespace:".__NAMESPACE__."\n"; ?> <?php echo 555; ?>
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 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 - 8.3.7
namespace:my 555
preferences:
143.19 ms | 403 KiB | 174 Q