How does PHP ZipArchive modify the access permissions of files in the compressed package?

How does PHP ZipArchive modify the access rights to files in the compressed package?

As a common compressed file solution, the ZipArchive class provides support for creating, reading, and modifying compressed packages in PHP. It is very convenient, but when processing compressed packages, you may need to modify the access permissions of the files inside. This article will introduce how to use the ZipArchive class to modify the access permissions of files in compressed packages.

First of all, before modifying the access permissions, we need to open the compressed package and locate the file that needs to modify the permissions. The following is an example of using the ZipArchive class to open a compressed archive and locate the file:

$zip = new ZipArchive();

$zipPath = 'path_to_your_zip_file.zip';

if ($zip->open($zipPath) === true) {
    $targetFile = 'path_to_the_file_inside_zip.txt';

    // 定位到需要修改权限的文件
    $index = $zip->locateName($targetFile);

    // 如果找到了文件
    if ($index !== false) {
        // 获取文件信息
        $stat = $zip->statIndex($index);

        // 在这里进行权限修改

        // 关闭压缩包
        $zip->close();
    } else {
        echo '未找到文件';
    }
} else {
    echo '无法打开压缩包';
}

In the above example, we opened a compressed archive named path_to_your_zip_file.zip and located it. A filepath_to_the_file_inside_zip.txt. Now we can get file information through the $stat variable.

The ZipArchive class provides the method chmodName() for modifying access permissions, which can be used to modify file permissions. The following is an example of using the chmodName() method to modify file permissions:

// 将访问权限修改为755
$zip->chmodName($targetFile, 0755);

// 将访问权限修改为644
$zip->chmodName($targetFile, 0644);

In the above example, we modified the permissions of the path_to_the_file_inside_zip.txt file to 755 and 644 two different permissions.

After completing the permission modification, remember to close the compressed package to release resources. The following is the complete version of the sample code:

$zip = new ZipArchive();

$zipPath = 'path_to_your_zip_file.zip';

if ($zip->open($zipPath) === true) {
    $targetFile = 'path_to_the_file_inside_zip.txt';

    // 定位到需要修改权限的文件
    $index = $zip->locateName($targetFile);

    // 如果找到了文件
    if ($index !== false) {
        // 获取文件信息
        $stat = $zip->statIndex($index);

        // 将访问权限修改为755
        $zip->chmodName($targetFile, 0755);

        // 关闭压缩包
        $zip->close();
    } else {
        echo '未找到文件';
    }
} else {
    echo '无法打开压缩包';
}

Through the above example, we can modify the file access permissions in the compressed package. Using the ZipArchive class, we can easily locate the file that needs to be modified and change its permissions. This gives us more flexibility when working with compressed packages.

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