How to determine the file size of a compressed package through PHP ZipArchive?

How to determine the file size of compressed packages through PHP ZipArchive?

Summary:
PHP's ZipArchive class is a very useful tool that can be used to create, modify and extract compressed packages. However, sometimes we may need to judge the file size in the compressed package so that we can be prepared when dealing with large files. In this article, we will learn how to determine the size of the files in the compressed package through PHP's ZipArchive class.

Steps:

1. First, we need to create a ZipArchive object, and then use the open method to open a compressed package file. The code is as follows:

$zip = new ZipArchive;
if ($zip->open('path/to/your/archive.zip') === true) {
    // 压缩包打开成功
} else {
    // 压缩包打开失败
}

2. Next, we can use the getFromIndex method to obtain relevant information about the file at the specified index, which includes file name, file size and other information. The code is as follows:

$fileInfo = $zip->statIndex(0); // 获取第一个文件的信息
$fileSize = $fileInfo['size']; // 获取文件大小

3. In addition, we can also get the file name of the file at the specified index through the getNameIndex method. The code is as follows:

$fileName = $zip->getNameIndex(0); // 获取第一个文件的文件名

4. Below Is a complete sample code for traversing the files in the compressed package and outputting the file name and size:

$zip = new ZipArchive;
if ($zip->open('path/to/your/archive.zip') === true) {
    for ($i = 0; $i < $zip->numFiles; $i++) {
        $fileInfo = $zip->statIndex($i);
        $fileName = $zip->getNameIndex($i);
        $fileSize = $fileInfo['size'];
        echo "文件名：$fileName，文件大小：$fileSize bytes
";
    }
    $zip->close();
} else {
    echo '无法打开压缩包文件';
}

Notes:

1. Before using the ZipArchive class, Make sure the corresponding PHP Zip extension is enabled.
2. Before reading the files in the compressed package, make sure that the compressed package has been opened successfully.
3. In the code example, only the first file in the compressed package is traversed. If you need to loop through all files, please modify the loop condition in the code.

Conclusion:
Through PHP's ZipArchive class, we can easily judge the size of the files in the compressed package and perform corresponding processing as needed. This is very important when working with archives containing large files. Hope this article helps you!

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