之前在做一个有关文件操作的时候，遇到一个多文件下载的问题

//php 打包  /* creates a compressed zip file */  function create_zip($files = array(),$destination = '',$overwrite = false) {   //if the zip file already exists and overwrite is false, return false   if(file_exists($destination) && !$overwrite) { return false; }   //vars   $valid_files = array();   //if files were passed in...   if(is_array($files)) {    //cycle through each file    foreach($files as $file) {     //make sure the file exists     if(file_exists($file)) {      $valid_files[] = $file;     }    }   }   //if we have good files...   if(count($valid_files)) {    //create the archive php 系统自带类，具体使用方法参照：http://cn2.php.net/manual/en/class.ziparchive.php    $zip = new ZipArchive();    if($zip->open($destination,$overwrite ? ZIPARCHIVE::OVERWRITE : ZIPARCHIVE::CREATE) !== true) {     return false;    }    //add the files    foreach($valid_files as $file) {     $zip->addFile($file,$file);    }    //debug    //echo 'The zip archive contains ',$zip->numFiles,' files with a status of ',$zip->status;        //close the zip -- done!    $zip->close();        //check to make sure the file exists    return file_exists($destination);   }   else   {    return false;   }  }

//Sample Usage  $files_to_zip = array(   'preload-images/1.jpg',   'preload-images/2.jpg',   'preload-images/5.jpg',   'kwicks/ringo.gif',   'rod.jpg',   'reddit.gif'  );    //if true, good; if false, zip creation failed  $result = create_zip($files_to_zip,'my-archive.zip');

// php下载      function download($file_dir='web/uploadfile/', $file_name)      {          //检查文件是否存在            if (! file_exists ( $file_dir . $file_name )) {                echo "文件找不到";                exit ();            } else {                //打开文件                $file = fopen ( $file_dir . $file_name, "r" );                //输入文件标签                 Header ( "Content-type: application/octet-stream" );                Header ( "Accept-Ranges: bytes" );                Header ( "Accept-Length: " . filesize ( $file_dir . $file_name ) );                Header ( "Content-Disposition: attachment; filename=" . $file_name );                //输出文件内容                 //读取文件内容并直接输出到浏览器                echo fread ( $file, filesize ( $file_dir . $file_name ) );                fclose ( $file );                exit ();            }       }

转自：php 如何打包下载ziparchive的使用