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<?php $variableName = 'base64_decode(strrev(hex2bin(3d3d516343746d4d6d6c315669563362)));'; echo 'Hello '.$variableName.'!'; ?>
Output for 4.3.0 - 5.6.21, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
Hello base64_decode(strrev(hex2bin(3d3d516343746d4d6d6c315669563362)));!