PHP multiple file download

[guadaman]

I've seen this example on the \[code\]documentation for PHP readfile\[/code\]\[code\]<?php$file = 'monkey.gif';if (file_exists($file)) { header('Content-Description: File Transfer'); header('Content-Type: application/octet-stream'); header('Content-Disposition: attachment; filename='.basename($file)); header('Content-Transfer-Encoding: binary'); header('Expires: 0'); header('Cache-Control: must-revalidate, post-check=0, pre-check=0'); header('Pragma: public'); header('Content-Length: ' . filesize($file)); ob_clean(); flush(); readfile($file); exit;}?>\[/code\]How can you make it so It download multiple files say \[code\]monkey.gif\[/code\] and \[code\]girraffe.jpg\[/code\]Preferably without \[code\]ZIP\[/code\] files...