PHP实现打包下载文件的方法示例

/*** 下载文件* @param $img* @return string*/public function Download($img){    $items = [];    $names = [];    if($img)    {      //用于前端跳转zip链接拼接      $path_redirect = '/zip/'.date('Ymd');      //临时文件存储地址      $path      = '/tmp'.$path_redirect;      if(!is_dir($path))      {        mkdir($path, 0777,true);      }      foreach ($img as $key => $value) {        $fileContent = '';        $fileContent = $this->CurlDownload($value['url']);        if( $fileContent )        {          $__tmp = $this->SaveFile( $value['url'] , $path , $fileContent );          $items[] = $__tmp[0];          $names[] = $value['name'].'_'.($key+1).'.'.$__tmp[1];        }      }      if( $items )      {        $zip = new ZipArchive();        $filename = time().'download.zip';        $zipname = $path.'/'.$filename;        if (!file_exists($zipname)) {          $res = $zip->open($zipname, ZipArchive::CREATE | ZipArchive::OVERWRITE);          if ($res) {            foreach ($items as $k => $v) {              $value = explode("/", $v);              $end  = end($value);              $zip->addFile($v, $end);              $zip->renameName($end, $names[$k]);            }            $zip->close();          } else {            return '';          }          //通过前端js跳转zip地址下载,让不使用php代码下载zip文件          //if (file_exists($zipname)) {            //拼接附件地址            //$redirect = 域名.$path_redirect.'/'.$filename;            //return $redirect;            //header("Location:".$redirect);          //}          //直接写文件的方式下载到客户端          if (file_exists($zipname)) {            header("Cache-Control: public");            header("Content-Description: File Transfer");            header('Content-disposition: attachment; filename=附件.zip'); //文件名            header("Content-Type: application/zip"); //zip格式的            header("Content-Transfer-Encoding: binary"); //告诉浏览器，这是二进制文件            header('Content-Length: ' . filesize($zipname)); //告诉浏览器，文件大小            @readfile($zipname);          }          //删除临时文件          @unlink($zipname);        }      }      return '';    }}/*** curl获取链接内容* @param $url* @return mixed|string*/public function CurlDownload($url) {    $ch = curl_init($url);    curl_setopt($ch, CURLOPT_IPRESOLVE, CURL_IPRESOLVE_V4);    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);    curl_setopt($ch, CURLOPT_HEADER, 0);    curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 20);    curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);    curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false);    $errno   = curl_errno($ch);    $error   = curl_error($ch);    $res=curl_exec($ch);    curl_close($ch);    if($errno>0){      return '';    }    return $res;}/*** 保存临时文件* @param $url* @param $dir* @param $content* @return array*/public function SaveFile( $url ,$dir , $content){    $fname   = basename($url); //返回路径中的文件名部分    $str_name  = pathinfo($fname); //以数组的形式返回文件路径的信息    $extname  = strtolower($str_name['extension']); //把扩展名转换成小写    $path    = $dir.'/'.md5($url).$extname;    $fp     = fopen( $path ,'w+' );    fwrite( $fp , $content );    fclose($fp);    return array( $path , $extname) ;}

$img = [['url'=>'地址url/1.jpg','name'=>'名字']];Download($img);