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run code in 200+ php & hhvm versions
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<?php> base64_decode(strrev(hex2bin("3d3d516343746d4d6d6c315669563362")))
Output for 5.3.28 - 5.3.29, 5.4.18 - 5.4.32
<?php> base64_decode(strrev(hex2bin("3d3d516343746d4d6d6c315669563362")))
Output for 5.3.0 - 5.3.27, 5.4.0 - 5.4.17
<?php> base64_decode(strrev(hex2bin("3d3d516343746d4d6d6c315669563362")))