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run code in 300+ PHP versions simultaneously
<?php $start = microtime(true); sleep(5); $calculated = microtime(true) - $start; echo "time_here: " . $calculated . "\n"; ?> # result: 1.9073486328125E-6
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.6

Process exited with code 137.
preferences:
63.95 ms | 401 KiB | 33 Q