php 檔案加密

//第一種隨機字元加密
function RandAbc($length = "") { // 返回隨機字串    
     $str = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";    
     return str_shuffle($str);    
 }     

 $filename = 'count.inc.php'; //要加密的檔案    
 $T_k1 = RandAbc(); //隨機密匙1    
 $T_k2 = RandAbc(); //隨機密匙2    
 $vstr = file_get_contents($filename);    
 $v1 = base64_encode($vstr);    
 $c = strtr($v1, $T_k1, $T_k2); //根據密匙替換對應字元。    
 $c = $T_k1.$T_k2.$c;    
 $q1 = "O00O0O";    
 $q2 = "O0O000";    
 $q3 = "O0OO00";    
 $q4 = "OO0O00";    
 $q5 = "OO0000";    
 $q6 = "O00OO0";    
 $s = '$'.$q6.'=urldecode("%6E1%7A%62%2F%6D%615%5C%76%740%6928%2D%70%78%75%71%79%2A6%6C%72%6B%64%679%5F%65%68%63%73%77%6F4%2B%6637%6A");$'.$q1.'=$'.$q6.'{3}.$'.$q6.'{6}.$'.$q6.'{33}.$'.$q6.'{30};$'.$q3.'=$'.$q6.'{33}.$'.$q6.'{10}.$'.$q6.'{24}.$'.$q6.'{10}.$'.$q6.'{24};$'.$q4.'=$'.$q3.'{0}.$'.$q6.'{18}.$'.$q6.'{3}.$'.$q3.'{0}.$'.$q3.'{1}.$'.$q6.'{24};$'.$q5.'=$'.$q6.'{7}.$'.$q6.'{13};$'.$q1.'.=$'.$q6.'{22}.$'.$q6.'{36}.$'.$q6.'{29}.$'.$q6.'{26}.$'.$q6.'{30}.$'.$q6.'{32}.$'.$q6.'{35}.$'.$q6.'{26}.$'.$q6.'{30};eval($'.$q1.'("'.base64_encode('$'.$q2.'="'.$c.'";eval(\'?>\'.$'.$q1.'($'.$q3.'($'.$q4.'($'.$q2.',$'.$q5.'*2),$'.$q4.'($'.$q2.',$'.$q5.',$'.$q5.'),$'.$q4.'($'.$q2.',0,$'.$q5.'))));').'"));';    

 $s = '<?php '."\n".$s."\n".' ?>';    
 //echo $s;    
 // 生成 加密後的PHP檔案    
 $fpp1 = fopen('temp_'.$filename, 'w');    
 fwrite($fpp1, $s) or die('寫檔案錯誤');    

//第二種base_64加密
function encode_file_contents($filename) {    
     $type=strtolower(substr(strrchr($filename,'.'),1));    
     if ('php' == $type && is_file($filename) && is_writable($filename)) { // 如果是PHP檔案 並且可寫 則進行壓縮編碼    
         $contents = file_get_contents($filename); // 判斷檔案是否已經被編碼處理    
         $contents = php_strip_whitespace($filename);     

         // 去除PHP頭部和尾部標識    
         $headerPos = strpos($contents,'<?php');    
         $footerPos = strrpos($contents,'?>');    
         $contents = substr($contents, $headerPos + 5, $footerPos - $headerPos);    
         $encode = base64_encode(gzdeflate($contents)); // 開始編碼    
         $encode = '<?php'."\n eval(gzinflate(base64_decode("."'".$encode."'".")));\n\n?>";     

         return file_put_contents($filename, $encode);    
     }    
     return false;    
 }