/**   $res = new MakeZip($dir,$zipName);*@ $dir是被压缩的文件夹名称,可使用路径，例 'a'或者'a/test.txt'或者'test.txt'*@ $zipName是压缩后的压缩包名称，可使用路径，例 'a/test.zip'或者'test.zip'**/class MakeZip {    private $_dir;    private $_zipDir;    private $_zipName;        public function __construct($dir,$zipName) {        $this->_dir = $dir;        $this->_zipDir = basename($dir);        $this->_zipName = $zipName;        $this->mkdirs();        $this->creat();    }    //检测并生成目录    private function mkdirs() {        if (!is_dir(dirname($this->_zipName))) {            $arr = explode('/', dirname($this->_zipName));            $arrs = '';            foreach($arr as $value) {                if (!is_dir($arrs.$value)) {                    if (!!mkdir($arrs.$value)) {                        $arrs .= $value.'/';                    }                }            }        }    }    //生成Zip压缩包    private function creat() {        $zip = new ZipArchive;        if (is_dir($this->_dir)) {            $this->readDir($this->_dir,$files);            if ($zip->open($this->_zipName,ZipArchive::CREATE)) {                foreach ($files as $value) {                    preg_match('/\/('.$this->_zipDir.'\/.*)/', $value, $match);                    if (is_dir($value)) {                        @$zip->addEmptyDir($value, $match[1]);                    } else {                        @$zip->addFile($value, $match[1]);                    }                }                $zip->close();            }        } else {            if ($zip->open($this->_zipName,ZipArchive::CREATE)) {                $zip->addFile($this->_dir, basename($this->_dir));            }        }    }    //读取文件夹所有文件    private function readDir($dir,&$arr) {        if ($dirs = opendir($dir)) {            while (($file=readdir($dirs)) != false) {                if ($file == '.' || $file == '..') continue;                $files = $dir .'/'. $file;                if (is_dir($files) && $this->isEmpty($files)) {                    $this->readDir($files,$arr);                } else {                    $arr[] = $files;                }            }        }        closedir($dirs);    }    //判断文件夹是否为空    private function isEmpty($dir) {        if ($dirs = opendir($dir)) {            while (($file=readdir($dirs)) != false) {                if($file != '.' && $file != '..') {                    closedir($dirs);                    return true;                    break;                }            }            closedir($dirs);            return false;        }    }}