3v4l.org

run code in 300+ PHP versions simultaneously
<?php $alpha = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789'; $length = 11; $ran = rand(0, strlen($alpha)); $key = substr($alpha, $ran, 1); echo $key; ?>

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34.62 ms | 402 KiB | 5 Q