PHP ZipArchive implements compression and decompression of Zip files

PHP ZipArchive is an extension class that comes with PHP, which can easily compress and decompress ZIP files. Before using it, you must first make sure that the PHP ZIP extension has been turned on. I won’t go into details about how to turn it on. The methods of turning on PHP expansion on different platforms are online. Yes, if you have any questions, please feel free to chat. Here are some commonly used examples for reference. 1. Unzip the zip file

$zip = new ZipArchive;//新建一个ZipArchive的对象
/*
通过ZipArchive的对象处理zip文件
$zip->open这个方法的参数表示处理的zip文件名。
如果对zip文件对象操作成功，$zip->open这个方法会返回TRUE
*/
if ($zip->open('test.zip') === TRUE)
{
$zip->extractTo('images');//假设解压缩到在当前路径下images文件夹的子文件夹php
$zip->close();//关闭处理的zip文件
}

2. Compress the file into a zip file

$zip = new ZipArchive;
/*
$zip->open这个方法第一个参数表示处理的zip文件名。
第二个参数表示处理模式，ZipArchive::OVERWRITE表示如果zip文件存在，就覆盖掉原来的zip文件。
如果参数使用ZIPARCHIVE::CREATE，系统就会往原来的zip文件里添加内容。
如果不是为了多次添加内容到zip文件，建议使用ZipArchive::OVERWRITE。
使用这两个参数，如果zip文件不存在，系统都会自动新建。
如果对zip文件对象操作成功，$zip->open这个方法会返回TRUE
*/
if ($zip->open('test.zip', ZipArchive::OVERWRITE) === TRUE)
{
$zip->addFile('image.txt');//假设加入的文件名是image.txt，在当前路径下
$zip->close();
}

3. Add file append content to the zip file

$zip = new ZipArchive;
$res = $zip->open('test.zip', ZipArchive::CREATE);
if ($res === TRUE) {
$zip->addFromString('test.txt', 'file content goes here');
$zip->close();
echo 'ok';
} else {
echo 'failed';
}

4. Pack the folder into a zip file

function addFileToZip($path, $zip) {
$handler = opendir($path); //打开当前文件夹由$path指定。
/*
循环的读取文件夹下的所有文件和文件夹
其中$filename = readdir($handler)是每次循环的时候将读取的文件名赋值给$filename，
为了不陷于死循环，所以还要让$filename !== false。
一定要用!==，因为如果某个文件名如果叫'0'，或者某些被系统认为是代表false，用!=就会停止循环
*/
while (($filename = readdir($handler)) !== false) {
if ($filename != "." && $filename != "..") {//文件夹文件名字为'.'和‘..’，不要对他们进行操作
if (is_dir($path . "/" . $filename)) {// 如果读取的某个对象是文件夹，则递归
addFileToZip($path . "/" . $filename, $zip);
} else { //将文件加入zip对象
$zip->addFile($path . "/" . $filename);
}
}
}
@closedir($path);
}

$zip = new ZipArchive();
if ($zip->open('images.zip', ZipArchive::OVERWRITE) === TRUE) {
addFileToZip('images/', $zip); //调用方法，对要打包的根目录进行操作，并将ZipArchive的对象传递给方法
$zip->close(); //关闭处理的zip文件
}

ZipArchive method is as follows:

ZipArchive::addEmptyDir — Add a new directory

ZipArchive::addFile — Adds a file to a ZIP archive from the given path

ZipArchive::addFromString — Add a file to a ZIP archive using its contents

ZipArchive::close — Close the active archive (opened or newly created)

ZipArchive::deleteIndex — delete an entry in the archive using its index

ZipArchive::deleteName — delete an entry in the archive using its name

ZipArchive::extractTo — Extract the archive contents

ZipArchive::getArchiveComment — Returns the Zip archive comment

ZipArchive::getCommentIndex — Returns the comment of an entry using the entry index

ZipArchive::getCommentName — Returns the comment of an entry using the entry name

ZipArchive::getFromIndex — Returns the entry contents using its index

ZipArchive::getFromName — Returns the entry contents using its name

ZipArchive::getNameIndex — Returns the name of an entry using its index

ZipArchive::getStatusString — Returns the status error message, system and/or zip messages

ZipArchive::getStream — Get a file handler to the entry defined by its name (read only).

ZipArchive::locateName — Returns the index of the entry in the archive

ZipArchive::open — Open a ZIP file archive

ZipArchive::renameIndex — Renames an entry defined by its index

ZipArchive::renameName — Renames an entry defined by its name

ZipArchive::setArchiveComment — Set the comment of a ZIP archive

ZipArchive::setCommentIndex — Set the comment of an entry defined by its index

ZipArchive::setCommentName — Set the comment of an entry defined by its name

ZipArchive::statIndex — Get the details of an entry defined by its index.

ZipArchive::statName — Get the details of an entry defined by its name.

ZipArchive::unchangeAll — Undo all changes done in the archive

ZipArchive::unchangeArchive — Revert all global changes done in the archive.

ZipArchive::unchangeIndex — Revert all changes done to an entry at the given index

ZipArchive::unchangeName — Revert all changes done to an entry with the given name.

以上就介绍了PHP ZipArchive 实现压缩解压Zip文件，包括了方面的内容，希望对PHP教程有兴趣的朋友有所帮助。