3v4l.org

run code in 300+ PHP versions simultaneously
<?php $success = ""; $size = 32; $token = ""; $seed = (int)bin2hex(openssl_random_pseudo_bytes($size / 2)); srand($seed); for($i = 0; $i < 16; $i++) { $randomDigit = (string)rand() % 10; $token .= "," . $randomDigit; } $token = str_replace(",", "", $token); echo $token; ?>

Here you find the average performance (time & memory) of each version. A grayed out version indicates it didn't complete successfully (based on exit-code).

VersionSystem time (s)User time (s)Memory (MiB)
7.1.00.1230.01014.96
7.0.00.1170.01714.61
preferences:
28.9 ms | 401 KiB | 5 Q