帮解密一段php代码,该如何解决

帮解密一段php代码
帮解密一段php代码,代码如下:
$OOO0O0O00=__FILE__;$OOO000000=urldecode('%74%68%36%73%62%65%68%71%6c%61%34%63%6f%5f%73%61%64%66%70%6e%72');$OO00O0000=1400;$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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
------解决方案--------------------
把eval($WSc换成base64_decode就能解出一部分了
重复使用base64_decode就能解了