请懂PHP程序语言的，帮我修改下一这个代码啊！很简单我就是不会，万分感谢啊！

介个算8上啥加密啦.只是把程序写得难看了点.
$a= base64_decode('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');
$b = base64_decode('JF9YPWJhc2U2NF9kZWNvZGUoJF9YKTskX1g9c3RydHIoJF9YLCdiamNldmRmcmE4MDk2NDIzMTUnLCc1MTMyNDY5MDhhcmZkdmVjamInKTskX1I9ZXJlZ19yZXBsYWNlKF9fRklMRV9fLCRfRiwkX1gpO2V2YWwoJF9SKTskX1I9MDskX1g9MDs=');
echo $a."\n-----------华丽的分割鸟~----------------\n".$b;

你自己运行看看吧.解出来的函数名,变量名是命名得比较变态.自己琢磨吧.

变量定义都没有，真很难看懂啊
都不知道你变量代表的是什么