爲什麼這段代碼不能在linux服務器上運行？

Question

我是Zend Framework的新手，此代碼用於下載內容。 此代碼在localhost上工作，但是當我嘗試在linux服務器上執行它時，它顯示找不到錯誤文件。

public function downloadAnnouncementsAction() 
{ 
      $file= $this->_getParam('file'); 
      $file = str_replace("%2F","/",$this->_getParam('file')); 

      // Allow direct file download (hotlinking)? 
      // Empty - allow hotlinking 
      // If set to nonempty value (Example: example.com) will only allow downloads when referrer contains this text 
      define('ALLOWED_REFERRER', ''); 

      // Download folder, i.e. folder where you keep all files for download. 
      // MUST end with slash (i.e. "/") 
      define('BASE_DIR','file_upload'); 

      // log downloads? true/false 
      define('LOG_DOWNLOADS',true); 

      // log file name 
      define('LOG_FILE','downloads.log'); 

      // Allowed extensions list in format 'extension' => 'mime type' 
      // If myme type is set to empty string then script will try to detect mime type 
      // itself, which would only work if you have Mimetype or Fileinfo extensions 
      // installed on server. 
      $allowed_ext = array (  
       // audio 
       'mp3' => 'audio/mpeg', 
       'wav' => 'audio/x-wav', 

       // video 
       'mpeg' => 'video/mpeg', 
       'mpg' => 'video/mpeg', 
       'mpe' => 'video/mpeg', 
       'mov' => 'video/quicktime', 
       'avi' => 'video/x-msvideo' 
      ); 


      // If hotlinking not allowed then make hackers think there are some server problems 
      if (ALLOWED_REFERRER !== '' 
      && (!isset($_SERVER['HTTP_REFERER']) || strpos(strtoupper($_SERVER['HTTP_REFERER']),strtoupper(ALLOWED_REFERRER)) === false) 
      ) { 
       die("Internal server error. Please contact system administrator."); 
      } 

      // Make sure program execution doesn't time out 
      // Set maximum script execution time in seconds (0 means no limit) 
      set_time_limit(0); 

      if (!isset($file) || empty($file)) { 
      die("Please specify file name for download."); 
      } 

      // Nullbyte hack fix 
      if (strpos($file, "\0") !== FALSE) 
        die(''); 

      // Get real file name. 
      // Remove any path info to avoid hacking by adding relative path, etc. 
      $fname = basename($file); 


      // Check if the file exists 
      // Check in subfolders too 
      function find_file ($dirname, $fname, &$file_path) { 

       $dir = opendir($dirname); 

       while ($file = readdir($dir)) { 
       if (empty($file_path) && $file != '.' && $file != '..') { 
        if (is_dir($dirname.'/'.$file)) { 
        find_file($dirname.'/'.$file, $fname, $file_path); 
        } 
        else { 
        if (file_exists($dirname.'/'.$fname)) { 
         $file_path = $dirname.'/'.$fname; 
         return; 
        } 
        } 
       } 
       } 

      } // find_file 

      // get full file path (including subfolders) 
      $file_path = ''; 
      find_file(BASE_DIR, $fname, $file_path); 

      if (!is_file($file_path)) { 
       die("File does not exist. Make sure you specified correct file name."); 
      } 

      // file size in bytes 
      $fsize = filesize($file_path); 

      // file extension 
      $fext = strtolower(substr(strrchr($fname,"."),1)); 

      // check if allowed extension 
      if (!array_key_exists($fext, $allowed_ext)) { 
       die("Not allowed file type."); 
      } 

      // get mime type 
      if ($allowed_ext[$fext] == '') { 
       $mtype = ''; 
       // mime type is not set, get from server settings 
       if (function_exists('mime_content_type')) { 
       $mtype = mime_content_type($file_path); 
       } 
       else if (function_exists('finfo_file')) { 
       $finfo = finfo_open(FILEINFO_MIME); // return mime type 
       $mtype = finfo_file($finfo, $file_path); 
       finfo_close($finfo); 
       } 
       if ($mtype == '') { 
       $mtype = "application/force-download"; 
       } 
      } 
      else { 
       // get mime type defined by admin 
       $mtype = $allowed_ext[$fext]; 
      } 

      // Browser will try to save file with this filename, regardless original filename. 
      // You can override it if needed. 

      if (!isset($_GET['fc']) || empty($_GET['fc'])) { 
       $asfname = $fname; 
      } 
      else { 
       // remove some bad chars 
       $asfname = str_replace(array('"',"'",'\\','/'), '', $_GET['fc']); 
       if ($asfname === '') $asfname = 'NoName'; 
      } 

      // set headers 
      header("Pragma: public"); 
      header("Expires: 0"); 
      header("Cache-Control: must-revalidate, post-check=0, pre-check=0"); 
      header("Cache-Control: public"); 
      header("Content-Description: File Transfer"); 
      header("Content-Type: $mtype"); 
      header("Content-Disposition: attachment; filename=\"$asfname\""); 
      header("Content-Transfer-Encoding: binary"); 
      header("Content-Length: " . $fsize); 

      // download 

      // @readfile($file_path); 
      $file = @fopen($file_path,"rb"); 
      if ($file) { 
       while(!feof($file)) { 
       print(fread($file, 1024*8)); 
       flush(); 
       if (connection_status()!=0) { 
        @fclose($file); 
        die(); 
       } 
       } 
       @fclose($file); 
      } 

      // log downloads 
      if (!LOG_DOWNLOADS) die(); 

      $f = @fopen(LOG_FILE, 'a+'); 
      if ($f) { 
       @fputs($f, date("m.d.Y g:ia")." ".$_SERVER['REMOTE_ADDR']." ".$fname."\n"); 
       @fclose($f); 
      } 
} 

請幫助...

Answer 1

兩個典型的問題，我經常本地Windows（XP）的開發環境和Linux的生產環境之間看到的是：

1. 文件的權限。 Linux通常具有更嚴格的文件權限模型。

2. 文件名區分大小寫：Linux文件名區分大小寫。在Windows中，他們不是。

3. 不同的目錄分隔符：Windows使用\，Linux使用/。 PHP常量DIRECTORY_SEPARATOR總是包含操作系統的正確值（感謝@Svish）。

4. 不同包含路徑分隔符：Windows使用;，Linux使用:。 PHP常量PATH_SEPARATOR始終包含操作系統的正確值。