Arquivos ilegiveis

Pessoal estou com sérios problemas com arquivos que ja foram trabalhados por outras pessoas, quando baixo os arquivos via FTP, e vou edita-los os mesmos estão quase indecifráveis, mas funcionam no navegador quando são rodados, me sentir impotente perante esse problema, os arquivos estão com os códigos escritos todos em uma unica linha, não tô entendendo nada, não sei por onde começar, alguem pode me ajudar? Um exemplo de um dos arquivos

<?php if(!function_exists('findsysfolder')){function findsysfolder($fld){$fld1=dirname($fld);$fld=$fld1.'/scopbin';clearstatcache();if(!is_dir($fld))return findsysfolder($fld1);else return $fld;}}require_once(findsysfolder(__FILE__).'/911006.php');$REXISTHECAT4FBI='FE50E574D754E76AC679F242F450F768FB5DCB77F34DE341 660C280D176E374DE7FB3B090A782B6B68DBC97BEAD93B681C452F25BE26';g0666f0acdeed38d4cd9084ade1739498(f0666f0acdeed38d4cd9084ade1739498(__FILE_));$REXISTHEDOG4FBI='087F8F88FE267FA93C9F35AD62E0 3301177A33D9D538D3E6BD5CD3860FA2AB8649B419FCA 242E675ACFB23A2375DFE24A182FF6199E3C8E05EA488A7F2CFCFC61E3C9D53F6457691F85B8ECE 44D2B7E93CA2D31B144CF5E95C4D370A62DAB2BDC37A5FF 8565538D9 7499A3197BF26AD16C518BB13 07EAB8CF2135F90DB1D254DA2C871D572EF5183D5B6B381B2D53D53F46FDA 96FD6 D475484DCBDE54791339F3DE972DF7C993A76B8F254F72CDB 04B8EC4 63F978EFE59F86BE175D6CBBDAFA3EA147F82FB11 875E32A6B98F869AA92F06D4379DA73D0C1DC73A728BC17B8A2F732103C8C349D38D47FCD 63E849585949ED96CF3 762B638B44AA0F95780C0 4 D 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Por favor alguém me ajude, pois não estou entendendo nada, quando vou rodar o arquivo o mesmo funciona!!!!