在php中创建和下载zip压缩文件

$zip = new ZipArchive();
$zipName = 'example.zip';

if ($zip->open($zipName, ZipArchive::CREATE | ZipArchive::OVERWRITE) === true) {
    // 添加要压缩的文件或内容到ZIP文件中
    $zip->addFile('path/to/file1.txt', 'file1.txt');
    $zip->addFile('path/to/file2.txt', 'file2.txt');
    $zip->addFromString('file3.txt', 'This is file 3 content');
    
    $zip->close();
    echo 'ZIP文件创建成功';
} else {
    echo 'ZIP文件创建失败';
}

$zipName = 'example.zip';

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

readfile($zipName);