How to compress files and modify directory names in php

In web development, we often need to package multiple files into a compressed file to implement the function of downloading or backing up data. In actual applications, it is often necessary to modify the file names or directory names of these compressed files in order to better manage and maintain these files.

As an important language in Web development, PHP provides many convenient functions and classes for file compression and decompression operations. At the same time, PHP can also be used to modify the directory name in the compressed file.

Below, we will introduce how to use PHP to compress files and modify the directory name in the compressed file.

1. Compressed file operations

PHP provides the ZipArchive class to perform file compression and decompression operations. The ZipArchive class can open compressed files in .zip format and provides methods for adding, deleting, renaming and other operations.

Let’s first take a look at how to use PHP to package multiple files into a compressed file.

<?php
$zip = new ZipArchive(); // 新建一个ZipArchive的实例
$filename = "/path/to/filename.zip"; // 设置压缩文件名

if ($zip->open($filename, ZipArchive::CREATE)!==TRUE) { 
  exit("无法创建 <$filename>\n"); // 如果打开压缩文件失败，则输出错误信息并退出
}

$files_to_be_zipped = array("file1.txt", "file2.txt", "file3.jpg"); // 要压缩的文件数组
foreach ($files_to_be_zipped as $file) {
  $zip->addFile($file); // 将每一个文件添加到压缩文件中
}

$zip->close(); // 关闭压缩文件
echo "压缩文件创建成功！"; // 输出提示信息
?>

In the above example, we created a new ZipArchive instance and set the compressed file name and the array of files to be compressed. We then iterate through the array of files, adding each file to the compressed file. Finally, we close the compressed file and output a prompt message indicating that the compressed file was successfully created.

2. Decompress file operation

In addition to packaging files, PHP also provides the ZipArchive class to decompress files. We can use the extractTo() method in the ZipArchive class to extract the files in the compressed file to a specified directory.

<?php
$zip = new ZipArchive();
$filename = "/path/to/filename.zip"; // 压缩文件名

if ($zip->open($filename) === TRUE) {
    $zip->extractTo("/path/to/unzip/folder/"); // 将压缩文件解压到该目录
    $zip->close();
    echo "解压缩成功！";
} else {
    echo "解压缩失败！";
}
?>

In the above example, we first created a new ZipArchive instance and opened a compressed file. Then, we called the extractTo() method to extract all files in the compressed file to the specified directory. Finally, we close the compressed file and output a success or failure message.

3. Modify the directory name in the compressed file

When we need to modify the directory name in the compressed file, we can first decompress the compressed file into a directory, and then find the required For the modified folder, use the rename() function in PHP to modify it, and finally use the ZipArchive class to recompress the modified folder into a new compressed file.

The following is the sample code:

<?php
$zip = new ZipArchive();
$filename = "/path/to/filename.zip"; // 压缩文件名

if ($zip->open($filename) === TRUE) {
    $zip->extractTo("/path/to/unzip/folder/"); // 将压缩文件解压到该目录
    $zip->close();

    $old_folder_name = "/path/to/unzip/folder/old_folder_name"; // 需要修改的文件夹
    $new_folder_name = "/path/to/unzip/folder/new_folder_name"; // 修改后的文件夹名称
    rename($old_folder_name, $new_folder_name); // 修改文件夹名称

    $new_zip_file = "/path/to/new/filename.zip"; // 新压缩文件的路径
    $zip = new ZipArchive();
    if ($zip->open($new_zip_file, ZipArchive::CREATE) !== TRUE) { 
      exit("无法创建 <$new_zip_file>\n"); // 如果创建压缩文件失败，则输出错误信息并退出
    }
    $zip->addGlob('/path/to/unzip/folder/*'); // 将文件夹中所有文件添加到新压缩文件中
    $zip->close();
    echo "压缩文件创建成功！"; // 输出提示信息
} else {
    echo "解压缩失败！";
}
?>

In the above example, we first open the compressed file to be modified and extract it to the specified directory. Then, we find the directory that needs to be modified and modify it using the rename() function. After the modification is completed, we create a new ZipArchive instance and add all the files in the modified folder to the new compressed file. Finally, we close the compressed file and output a message indicating that the new compressed file was successfully created.

Summary

PHP provides the ZipArchive class to perform file compression and decompression operations, and provides some convenient methods to implement operations such as adding, deleting, and renaming. We can use the ZipArchive class to manage and maintain compressed files. At the same time, we can also modify the directory name in the compressed file by decompressing the file and using the rename() function. These operations can help us better manage and maintain data and files in web applications.

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