记一次对PHP代码加密的破解

题记

一次在开发PHP时，需要参考一段代码。然后从伟大的度娘哪里百度了一段。可以实现我们想要的功能，但是当我在修改代码的过程中，遇到了下面情况。

<?php // Copyright(C) 2008-2012 www.axphp.com, All rights reserved.
$OOO0O0O00=__FILE__;$OOO000000=urldecode('%74%68%36%73%62%65%68%71%6c%61%34%63%6f%5f%73%61%64%66%70%6e%72');$OO00O0000=1300;$OOO0000O0=$OOO000000{4}.$OOO000000{9}.$OOO000000{3}.$OOO000000{5};$OOO0000O0.=$OOO000000{2}.$OOO000000{10}.$OOO000000{13}.$OOO000000{16};$OOO0000O0.=$OOO0000O0{3}.$OOO000000{11}.$OOO000000{12}.$OOO0000O0{7}.$OOO000000{5};$O0O0000O0='OOO0000O0';eval(($$O0O0000O0('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')));return;?>
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

恩恩，这是什么鬼！

查了下

$OOO0O0O00=__FILE__;$OOO000000

是用来加密的，那么我们该如何处理这个问题呢？
借助伟大的google粑粑。我找到了一个解密网站。
微盾解密：https://yoursunny.com/p/PHP-decode/

我们打开网站，复制上面的代码，然后点解解密即可。