How to Create and Download a Multi-File ZIP Archive in PHP?

Creating ZIP Archives with Multiple Files in PHP

To download multiple files as a single ZIP archive using PHP, we can leverage the ZipArchive class.

Creating the ZIP Archive:

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

This code creates a ZIP archive named 'file.zip' and adds the specified files to it.

Streaming the ZIP Archive for Download:

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

These headers prepare the browser to display a download prompt and set the appropriate file name and size. By reading the ZIP archive file and streaming its contents, the browser can download it.

Additional Notes:

• The 'Content-disposition' header forces the browser to present a download box to the user.
• The 'Content-Length' header is optional, but it ensures compatibility with older browsers.
• This approach allows for the dynamic creation of ZIP archives containing multiple files and their download.

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