PHP Implementation Package Download File Method Example

In this paper, an example is given to describe the method of packaging and downloading files by PHP. Share it for your reference, as follows:

/**
*  Download a file 
* @param $img
* @return string
*/
public function Download($img)
{
    $items = [];
    $names = [];
    if($img)
    {
      // Used for front-end jump zip Link splicing 
      $path_redirect = '/zip/'.date('Ymd');
      // Temporary file storage address 
      $path      = '/tmp'.$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]);
            }
            $zip->close();
          } else {
            return '';
          }
          // Through the front end js Jump zip Address download , Let not use php Code download zip Documents 
          //if (file_exists($zipname)) {
            // Spliced attachment address 
            //$redirect =  Domain name .$path_redirect.'/'.$filename;
            //return $redirect;
            //header("Location:".$redirect);
          //}
          // Download to the client by writing files directly 
          if (file_exists($zipname)) {
            header("Cache-Control: public");
            header("Content-Description: File Transfer");
            header('Content-disposition: attachment; filename= Annex .zip'); // Filename 
            header("Content-Type: application/zip"); //zip Format 
            header("Content-Transfer-Encoding: binary"); // Tell the browser that this is 2 Binary document 
            header('Content-Length: ' . filesize($zipname)); // Tell the browser that the file size 
            @readfile($zipname);
          }
          // Delete temporary files 
          @unlink($zipname);
        }
      }
      return '';
    }
}
/**
* curl Get link content 
* @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;
}
/**
*  Save a temporary file 
* @param $url
* @param $dir
* @param $content
* @return array
*/
public function SaveFile( $url ,$dir , $content)
{
    $fname   = basename($url); // Returns the filename portion of the path 
    $str_name  = pathinfo($fname); // Returns the information of the file path in the form of an array 
    $extname  = strtolower($str_name['extension']); // Convert extension to lowercase 
    $path    = $dir.'/'.md5($url).$extname;
    $fp     = fopen( $path ,'w+' );
    fwrite( $fp , $content );
    fclose($fp);
    return array( $path , $extname) ;
}

Quote:

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

More readers interested in PHP can check the topic of this site: "PHP Operation zip File and Compression Skills Summary", "php File Operation Summary", "php Regular Expression Usage Summary", "PHP Operation and Operator Usage Summary", "PHP Basic Grammar Introduction Tutorial", "php Object-Oriented Programming Introduction Tutorial", "php String (string) Usage Summary", "php+mysql Database Operation Introduction Tutorial" and "php Common Database Operation Skills Summary"

I hope this article is helpful to everyone's PHP programming.