【教學】PHP用內建ZipArchive函數，將目錄打包壓縮與解壓縮

ZipArchive 是 PHP 內建的 Zip模組，可以將你的目錄及檔案進行壓縮與解壓縮
免去一個一個檔案去備份下載或上傳

ZipArchive函數支援範圍

PHP 5 >= 5.2.0, PHP 7

將所在的目錄內，所有資料夾與檔案壓縮

<?php
class ToZip{
	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, $localPath);
				}else if(is_dir($filePath)){ // Add sub-directory.
					$zipFile->addEmptyDir($localPath);
					self::folderToZip($filePath, $zipFile, $exclusiveLength);
				}
			}
		}
		closedir($handle);
	}
	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();
		echo "BackupiZO.zip 壓縮完成";
		}
}
ToZip::zipDir(dirname(__FILE__), dirname(__FILE__).'/BackupiZO.zip');
?>

將 zip壓縮檔進行解壓縮

<?php
$zip=new ZipArchive;
if($zip->open('BackUp-iZO.zip')===TRUE){
	$zip->extractTo('backup'); //避免覆蓋，將解壓縮資料放進該資料夾
	$zip->close();
	echo "解壓縮完成";
}
?>

將特定檔案進行壓縮

<?php
$zip=new ZipArchive;
if($zip->open('BackupiZO.zip',ZipArchive::OVERWRITE)===TRUE){
  $zip->addFile('image.txt');//欲壓縮檔案
  $zip->close();
  echo "壓縮完成";
}
?>

常見問題

Fatal error: Class ‘ZipArchive’ not found
如果在 php 7 出現該錯誤訊息
只要重新運行
sudo apt-get install php7.0-zip
sudo service apache2 restart
就可以正常運作囉！

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