3v4l.org

run code in 300+ PHP versions simultaneously
<?php print bin2hex(strrev(base64_encode("3d3d516343746d4d6d6c315669563362"))); print hex2bin(strrev(base64_decode("3d3d516343746d4d6d6c315669563362")));

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27.43 ms | 408 KiB | 5 Q