How to use PHP ZipArchive to merge and split multiple compressed packages?

How to use PHP ZipArchive to merge and split multiple compressed packages?

Overview:
During the development process, sometimes we need to merge multiple compressed packages into one, or split a compressed package into multiple ones. PHP provides the ZipArchive extension to easily complete these operations. This article will introduce how to use PHP ZipArchive to merge and split multiple compressed packages.

1. Merge multiple compressed packages
   First, we need to create a new compressed package and open it. Then, loop through the list of compressed packages to be merged, and add the files in each compressed package to the new compressed package one by one. Finally, close the new archive and save it.

The sample code is as follows:

// 创建新的压缩包
$mergedZip = new ZipArchive();
$mergedZip->open('merged.zip', ZipArchive::CREATE);

// 遍历要合并的压缩包列表
$zipFiles = ['file1.zip', 'file2.zip', 'file3.zip'];
foreach ($zipFiles as $file) {
    // 打开要合并的压缩包
    $zip = new ZipArchive();
    if ($zip->open($file) === true) {
        // 将压缩包中的文件逐一添加到新的压缩包中
        for ($i = 0; $i < $zip->numFiles; $i++) {
            $filename = $zip->getNameIndex($i);
            $mergedZip->addFile($file, $filename);
        }
        $zip->close();
    }
}

// 关闭新的压缩包并保存
$mergedZip->close();

2. Split the compressed package
   The principle of splitting the compressed package is to decompress the original compressed package one by one, and according to the specified Conditions add files to different new compressed packages, and finally save these new compressed packages.

The sample code is as follows:

// 打开要拆分的压缩包
$zip = new ZipArchive();
if ($zip->open('original.zip') === true) {
    // 遍历压缩包中的文件
    for ($i = 0; $i < $zip->numFiles; $i++) {
        $filename = $zip->getNameIndex($i);

        // 根据指定条件将文件添加到不同的压缩包中
        if (/* 指定条件 */) {
            $splitZip1->addFile('original.zip', $filename);
        } else {
            $splitZip2->addFile('original.zip', $filename);
        }
    }

    // 关闭原始压缩包
    $zip->close();

    // 保存新建压缩包1
    $splitZip1->close();

    // 保存新建压缩包2
    $splitZip2->close();
}

It should be noted that the /* specified conditions */ in the above code need to be set according to actual needs.

Summary:
With the PHP ZipArchive extension, we can easily merge and split multiple compressed packages. For development projects that require frequent compression package processing, the sample code provided in this article can help you better complete related tasks. At the same time, in actual applications, it can also be combined with other PHP file operation functions and logic to achieve more complex compressed package processing requirements.

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