How to Create and Download a ZIP Archive of Multiple Files Using PHP?

Creating a ZIP Archive from Multiple Files in PHP

Question: How can I download multiple files as a ZIP archive using PHP?

Solution:

To achieve this, you can leverage PHP's ZipArchive class. Here's how you can proceed:

1. Create a ZIP Archive:

   $files = array('readme.txt', 'test.html', 'image.gif');
   $zipname = 'file.zip';
   $zip = new ZipArchive;
   $zip->open($zipname, ZipArchive::CREATE);

2. Add Files to the ZIP Archive:

   foreach ($files as $file) {
     $zip->addFile($file);
   }

3. Close the ZIP Archive:

   $zip->close();

4. Stream the ZIP Archive to the Client:

   header('Content-Type: application/zip');
   header('Content-disposition: attachment; filename="'.$zipname.'"');
   header('Content-Length: ' . filesize($zipname));
   readfile($zipname);

The first line in the streaming section specifies the Content-Type as a ZIP archive. The second line instructs the browser to display a download box for the user and assigns the filename file.zip. The third line calculates and sets the Content-Length header for older browsers that may encounter issues without knowing the file size in advance.

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