Step-by-step tutorial: How to compress and decompress files using the php extension ZipArchive

Step-by-step tutorial: How to compress and decompress files using the php extension ZipArchive

Introduction:
In modern web development, we often encounter situations where files need to be compressed and decompressed. The PHP extension library ZipArchive provides a convenient and fast way to compress and decompress files. This tutorial will introduce in detail how to use the ZipArchive extension to implement file compression and decompression functions, and attach code examples.

Prerequisites:
Before starting, make sure you have installed the ZipArchive extension for php on your web server. If you have not installed it yet, you can install it with the following command:

sudo apt-get install php-zip

Step 1: Create a Zip file

First, we need to create a Zip file and add the files to be compressed. Here are some sample codes to help you quickly understand how to use the ZipArchive extension to create Zip files.

<?php
// 创建一个新的Zip对象
$zip = new ZipArchive();

// 指定并打开待创建的Zip文件
$zip->open('compressed.zip', ZipArchive::CREATE | ZipArchive::OVERWRITE);

// 添加要压缩的文件到Zip文件中，可以多次调用该函数添加多个文件
$zip->addFile('file1.txt');
$zip->addFile('file2.txt');

// 关闭Zip文件
$zip->close();

echo '文件已成功压缩为compressed.zip';
?>

In the above code, we first create a new ZipArchive object and use the open() method to specify the Zip file to be created. Next, we use the addFile() method to add the files to be compressed to the Zip file. Finally, we close the Zip file by calling the close() method.

Step 2: Decompress the Zip file

Below we will introduce how to use the ZipArchive extension to decompress the Zip file. The following sample code demonstrates how to decompress a Zip file and save the decompressed file to a specified directory.

<?php
// 创建一个新的Zip对象
$zip = new ZipArchive();

// 打开待解压的Zip文件
if ($zip->open('compressed.zip') === TRUE) {
    // 解压缩Zip文件中所有文件到指定目录
    $zip->extractTo('extracted_files/');

    // 关闭Zip文件
    $zip->close();

    echo '文件已成功解压缩到extracted_files目录下';
} else {
    echo '无法打开指定的Zip文件';
}
?>

In the above code, we first create a new ZipArchive object and open the Zip file to be decompressed by calling the open() method. Next, we use the extractTo() method to extract all files in the Zip file to the specified directory. Finally, we close the Zip file.

Postscript:
This tutorial explains how to use php's ZipArchive extension to compress and decompress files. By creating a Zip object and calling the corresponding methods, we can easily implement file compression and decompression functions. I hope this tutorial can help you successfully compress and decompress files. If you encounter any problems or questions during use, you can leave a message below and I will try my best to answer it.

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