php ZipArchive压缩函数详解实例

用ZipArchive压缩文件，这个是PHP的扩展类，自PHP5.2版本以后就已经支持这个扩展，如果你在使用的时候出现错误，查看下PHP.ini里面的extension=PHP_zip.dll前面的分号有没有去掉，然后再重启Apache这样才能使用这个类库。
例1、生成zip 压缩文件

代码如下:

PHP
/* 生成zip 压缩文件 */
function create_zip($files = array(),$destination = '',$overwrite = false) {
//if the zip file already exists and overwrite is false,return false
if(file_exists($destination) && !$overwrite) { return false; }
//vars
$valid_files = array();
//if files were passed in...
if(is_array($files)) {
//cycle through each file
foreach($files as $file) {
//make sure the file exists
if(file_exists($file)) {
$valid_files[] = $file;
}
}
}
//if we have good files...
if(count($valid_files)) {
//create the archive
$zip = new ZipArchive();
if($zip->open($destination,$overwrite ? ZIPARCHIVE::OVERWRITE : ZIPARCHIVE::CREATE) !== true) {
return false;
}
//add the files
foreach($valid_files as $file) {
$file_info_arr= pathinfo($file);
$zip->addFile($file,$file_info_arr['basename']);//去掉层级目录
}
//debug
//echo 'The zip archive contains ',$zip->numFiles,' files with a status of ',$zip->status; //close the zip -- done!
$zip->close(); //check to make sure the file exists
return file_exists($destination);
}
else
{
return false;
}
} define('ROOTPATH',dirname ( __FILE__ )); //网站路径 $files_to_zip = array(
ROOTPATH.DIRECTORY_SEParaTOR.'PHP+jQuery+Cookbook.pdf',
ROOTPATH.DIRECTORY_SEParaTOR.'TurboListerZeroTemplate.csv'
);
//if true,good; if false,zip creation Failed
$filename='my-archive.zip';
$result = create_zip($files_to_zip,$filename);

例2 、压缩文件夹下面的所有文

代码如下:

PHP
/*
PHP zip压缩文件夹下面的所有文件
*/
class HZip
{
/**
* 添加文件和子目录的文件到zip文件
* @param string $folder
* @param ZipArchive $zipFile
* @param int $exclusiveLength Number of text to be exclusived from the file path.
*/
private static function folderToZip($folder,&$zipFile,$exclusiveLength) {
$handle = opendir($folder);
while (false !== $f = readdir($handle)) {
if ($f != '.' && $f != '..') {
$filePath = "$folder/$f";
// Remove prefix from file path before add to zip.
$localPath = substr($filePath,$exclusiveLength);
if (is_file($filePath)) {
$zipFile->addFile($filePath,$localPath);
} elseif (is_dir($filePath)) {
// 添加子文件夹
$zipFile->addEmptyDir($localPath);
self::folderToZip($filePath,$zipFile,$exclusiveLength);
}
}
}
closedir($handle);
} /**
* Zip a folder (include itself).
* Usage:
* HZip::zipDir('/path/to/sourceDir','/path/to/out.zip');
*
* @param string $sourcePath Path of directory to be zip.
* @param string $outZipPath Path of output zip file.
*/
public static function zipDir($sourcePath,$outZipPath)
{
$pathInfo = pathInfo($sourcePath);
$parentPath = $pathInfo['dirname'];
$dirName = $pathInfo['basename'];
$sourcePath=$parentPath.'/'.$dirName;//防止传递'folder' 文件夹产生bug
$z = new ZipArchive();
$z->open($outZipPath,ZIPARCHIVE::CREATE);//建立zip文件
$z->addEmptyDir($dirName);//建立文件夹
self::folderToZip($sourcePath,$z,strlen("$parentPath/"));
$z->close();
}
} //使用方法
HZip::zipDir('yourlife','yourlife.zip');
?>

1.ZipArchive::addEmptyDir
添加一个新的文件目录
2.ZipArchive::addFile
将文件添加到指定zip压缩包中。
3.ZipArchive::addFromString
添加的文件同时将内容添加进去
4.ZipArchive::close
关闭ziparchive
5.ZipArchive::extractTo
将压缩包解压
6.ZipArchive::open
打开一个zip压缩包
7.ZipArchive::getStatusstring
返回压缩时的状态内容，包括错误信息，压缩信息等等
8.ZipArchive::deleteIndex
删除压缩包中的某一个文件，如：deleteIndex(0)删除第一个文件
9.ZipArchive::deleteName
删除压缩包中的某一个文件名称，同时也将文件删除。