问个代码解密的问题 高手帮忙看下
请教下下面这个怎么解密
 <?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');$OO00O0000=2016;$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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