Question

这段php解密<?php $_F=__FILE__;$_X=和eval(base64_decode

<?php $_F=__FILE__;$_X='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';eval(base64_decode('JF9YPWJhc2U2NF9kZWNvZGUoJF9YKTskX1g9c3RydHIoJF9YLCcxMjM0NTZhb3VpZScsJ2FvdWllMTIzNDU2Jyk7JF9SPWVyZWdfcmVwbGFjZSgnX19GSUxFX18nLCInIi4kX0YuIiciLCRfWCk7ZXZhbCgkX1IpOyRfUj0wOyRfWD0wOw=='));?>

Answer 1

<?php $_F=__FILE__;
$_X='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';
echo base64_decode($_X);
echo base64_decode('JF9YPWJhc2U2NF9kZWNvZGUoJF9YKTskX1g9c3RydHIoJF9YLCcxMjM0NTZhb3VpZScsJ2FvdWllMTIzNDU2Jyk7JF9SPWVyZWdfcmVwbGFjZSgnX19GSUxFX18nLCInIi4kX0YuIiciLCRfWCk7ZXZhbCgkX1IpOyRfUj0wOyRfWD0wOw==');
?>

解码过程如上，运行一下就有结果了
很明显，上面有个base64_decode哪么自然就是base64加密，反向一下就可以了
另外一个很显著的特点是base64加密的要用eval执行，并且最后两个字符是==
reishi说的有可能！ 不过这样也能强行解

给钱吧，

Answer 2

看代码应该是用Byterun加密的，但是没解出来，不好意思！

Answer 3

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