PHP code example for packaging and downloading files

This article mainly introduces the method of packaging and downloading files in PHP, involving PHP's curl-based file acquisition, traversal, zip compression and downloading and other related operating skills. Friends in need can refer to the examples of this article

Describes the method of packaging and downloading files in PHP. Share it with everyone for your reference, the details are as follows:

/**
* 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) ;
}

Quote:

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

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