FileArchive.inc.php

<?php
 
class FileArchive {
 
   function __construct() {
   }
 
   function create($files, $filesDir) {
      // Create a temporary file.
      $archivePath = tempnam('/tmp', 'sf-');
 
      // attempt to use Zip first, if it is available.  Otherwise
      // fall back to the tar CLI.
      $zipTest = false;
      if (self::zipFunctional()) {
         $zipTest = true;
         $zip = new ZipArchive();
         if ($zip->open($archivePath, ZIPARCHIVE::CREATE) == true) {
            foreach ($files as $serverPath => $clientFilename) {
               $zip->addFile($filesDir . '/' . $serverPath, $clientFilename);
            }
            $zip->close();
         }
      } elseif (self::tarFunctional()) {
         // Create the archive and download the file.
         exec(Config::getVar('cli', 'tar') . ' -c -z ' .
               '-f ' . escapeshellarg($archivePath) . ' ' .
               '-C ' . escapeshellarg($filesDir) . ' ' .
               implode(' ', array_map('escapeshellarg', array_keys($files)))
         );
      } else {
         throw new Exception('No archive tool is available!');
      }
 
      return $archivePath;
   }
 
   static function zipFunctional() {
      return (extension_loaded('zip'));
   }
 
   static function tarFunctional() {
      $tarBinary = Config::getVar('cli', 'tar');
      return !empty($tarBinary) && file_exists($tarBinary);
   }
 
   static function isFunctional() {
      return self::zipFunctional() || self::tarFunctional();
   }
}