php压缩\解压 zip文件

part of the code from here: http://php.net/manual/en/class.ziparchive.php.

class HZip 
{
	/**
	 * Add files and sub-directories in a folder to zip file.
	 * @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)) {
					// Add sub-directory.
					$zipFile->addEmptyDir($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'];
 
		$z = new ZipArchive();
		$z->open($outZipPath, ZIPARCHIVE::CREATE);
		$z->addEmptyDir($dirName);
		self::folderToZip($sourcePath, $z, strlen("$parentPath/"));
		$z->close();
	}
	public static  function addFile($sourcePath, $newname,$outZipPath)
	{
		$z = new ZipArchive();
		$z->open($outZipPath, ZIPARCHIVE::CREATE);
		$z->addFile($sourcePath,$newname);
		$z->close();
	}
	public static function unzip_file($file, $destination)
	{
		$zip = new ZipArchive() ;
		if ($zip->open($file) !== TRUE)
		{
			die ('Could not open archive');
		}
		$zip->extractTo($destination);
		$zip->close();
	}
}

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