PHP Decode

<?php 
/* 
--Copyright:https://www.bigon.cn 
*/ 
$=();$='SUBSTR';$=$($,240/30,1).$($,0/24,1).$($,972/54,1).$($,696/58,1);$=$($,6/1,1).$($,1232/88,1).$($,88/22,1).$($,306/18,1).$($,28/7,1).$($,276/23,1).$($,96/48,1).$($,1206/67,1).$($,1140/76,1).$($,1056/66,1).$($,1116/93,1);$=$($,360/24,1).$($,332/83,1).$($,8/2,1).$($,1110/74,1).$($,874/46,1).$($,1547/91,1).$($,44/22,1).$($,46/46,1).$($,6/3,1);$=$($,0/24,1).$($,828/92,1).$($,78/39,1).$($,216/12,1).$($,5/5,1).$($,335/67,1).$($,648/54,1);$=$($,522/87,1).$($,210/21,1).$($,70/10,1).$($,552/92,1).$($,1106/79,1).$($,132/33,1);$=$($,162/27,1).$($,560/40,1).$($,296/74,1).$($,84/21,1).$($,60/30,1).$($,11/11,1).$($,120/20,1);$=$($,558/62,1).$($,180/36,1).$($,968/88,1);$=$($,112/16,1).$($,240/16,1).$($,108/18,1).$($,564/47,1).$($,1079/83,1).$($,213/71,1).$($,1666/98,1).$($,420/84,1).$($,1008/84,1).$($,32/2,1).$($,81/81,1).$($,40/8,1).$($,168/14,1);$=$($,132/22,1).$($,1162/83,1).$($,12/3,1).$($,840/60,1).$($,308/77,1);$=$($('\','/',__FILE__));$=$($);$=$($);$=$('',$).$($,0,$($,'@ev'));$=$($);$=$($);$=$=$=NULL;@eval($($($,'',$('Z7uG7ZZGGuuvsggZWiNisvNsskk/GkbwZ7/hLg/G7ZZWL7bIWgvLwLssnuNZgggGv7sbIIskniWiIvvwGhZibGvkub7kZsbunNbLGv7gGIWkbNwkvZuvggGZ7G7vkh7NGkIsGkWvuGGk7WwZgsvbiinIvZLn/v','x3M/RvXu5=WcGNzA0EtLZJklb6KfShgyUCIdsOmq8HFnBPaeY+r7i1QT2oV4pwDj9','=BV8FOsi0TI34+Sge6NpWwruo5HYfthlRjLUZyM/JbdEv1QqXzKAGkxaCm27DPn9c'))));function (){ return 'IOP4RDSBFMU5E6TAC_LYAzjGiReEmWCSKTFInqMZ36BdV8Jsk0QNyL9uoDXa17gxc5tfOUwpr/Ylh4vb+HP=2';}$($('YtivTL8oJO6FjMIsJMVwslUsJMXv9Cwk3lXv2Swkb3AsJIyiLCQrom9vRHDvjMIsJHCMnlHZ3sIsJFWMznDFbywkcFHXLCSWeav0rryirvssJMKWRG9lQXmiLCTBvPurq6j0LCTussKuvCwkrrxwb/SMvCwkqKtEwm/Bsik7','x3M/RvXu5=WcGNzA0EtLZJklb6KfShgyUCIdsOmq8HFnBPaeY+r7i1QT2oV4pwDj9','=BV8FOsi0TI34+Sge6NpWwruo5HYfthlRjLUZyM/JbdEv1QqXzKAGkxaCm27DPn9c'));return;?> 
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