php 多文件压缩打包

php自带zip类库ziparchive

 './public/img1.jpg', 'down_path' => 'file1/newimg1.jpg');
$fileArr[1] = array('file_path' => './public/img2.jpg', 'down_path' => 'file1/newimg2.jpg');
$fileArr[2] = array('file_path' => './public/img3.jpg', 'down_path' => 'file2/newimg.jpg');

//要使用该类，需要先启用 extension=php_zip.dll
$zip = new \ZipArchive ();
$res = $zip->open ( $zipname, \ZipArchive::CREATE );
if ($res === TRUE) {
    foreach ( $fileArr as $file ) {

        //这里将服务器上的文件添加到下载内容中，并重新赋值下载zip文件内该文件的路径
        $zip->addFile ( $file ['file_path'], $file ['down_path'] );
    }
}

$zip->close ();

header ( "Content-Type: application/zip" );
header ( "Content-Transfer-Encoding: Binary" );
header ( "Content-Length: " . filesize ( $zipname ) );
header ( "Content-Disposition: attachment; filename=\"" . basename ( $zipname ) . "\"" );

readfile ( $zipname );

//如不删除，则在服务器上会有 $zipname 这个zip文件
@unlink ( $zipname );

/*
下载后的 photo.zip 压缩包内包含两个文件夹 file1，file2。file1内包含文件为 newimg1.jpg，newimg2.jpg ，file2内包含文件为 newimg.jpg
photo.zip
-- file1
        -- newimg1.jpg
        -- newimg2.jpg
-- file2
        -- newimg.jpg

*/

open('pack.zip',ZIPARCHIVE::CREATE) === TRUE)
{
    foreach($fileArray as $file)
    {
        $zip->addFile($file, 'newname.txt');
    }
    $zip->close();
}
?>