3v4l.org

run code in 300+ PHP versions simultaneously
<?php $time = microtime(true); var_dump ($time + 0.000001 - $time);
Output for 5.5.0 - 5.5.35, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.10, 7.2.0
float(9.5367431640625E-7)
preferences:
85.28 ms | 403 KiB | 76 Q