3v4l.org

run code in 300+ PHP versions simultaneously
<?php $t=microtime(TRUE)+0.5; usleep(1000000 * ($t - microtime(TRUE)));
Output for 7.3.0 - 7.3.31, 7.4.0 - 7.4.24, 8.0.0 - 8.0.11
preferences:
39.92 ms | 406 KiB | 5 Q