PHP自带解密

 ');  
         $contents = substr($contents, $headerPos + 5, $footerPos - $headerPos);  
         $encode = base64_encode(gzdeflate($contents)); // 开始编码  
         $encode = '
 ";   
 
         return file_put_contents($filename, $encode);  
     }  
     return false;  
 }   
 
 //调用函数  
 $filename = 'index.php';  
 encode_file_contents($filename);  
 echo "OK,加密完成！" 
 ?>