3v4l.org

run code in 300+ PHP versions simultaneously
<?php $encodedSecret = "3d3d516343746d4d6d6c315669563362"; #function encodeSecret($secret) { # return bin2hex(strrev(base64_encode($secret))); print(base64_decode(strrev(hex2bin($encodedSecret)))); ?>

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39.77 ms | 402 KiB | 5 Q