Một PHP class tạo file ZIP

<?php
	require ("zipfile.inc.php");
 
	$zipfile = new zipfile();
 
	rec_listFiles('myFolder');
 
	header("Content-type: application/octet-stream");
	header("Content-disposition: attachment; filename=zipfile.zip");
	echo $zipfile->file();
 
	function rec_listFiles( $from = '.')
	{
		global $zipfile, $filedata;
 
		if(! is_dir($from))
			return false;
 
		if( $dh = opendir($from))
		{
			while( false !== ($file = readdir($dh)))
			{
				// Skip '.' and '..'
				if( $file == '.' || $file == '..')
					continue;
				$path = $from . '/' . $file;
				if( is_dir($path) ) {
					$zipfile->add_dir($path);
					rec_listFiles($path);
				}
				else {
					$filedata = implode("", file($path));
					$zipfile->add_file($filedata, $path);
				}
			}
			closedir($dh);
		}
	}
?>