php中zip压缩包的操作类

<?php/** * Zip 文件包工具 *  * @author wengxianhu * @date 2013-08-05 */class ZipFolder{    protected $zip;    protected $root;    protected $ignored_names;    public function __construct(){        $this->zip = new ZipArchive;    }    /**     * 解压zip文件到指定文件夹     *     * @access public     * @param string $zipfile 压缩文件路径     * @param string $path    压缩包解压到的目标路径     * @return booleam 解压成功返回 true 否则返回 false    */    public function unzip ($zipfile, $path) {        if ($this->zip->open($zipfile) === true) {            $file_tmp = @fopen($zipfile, "rb");            $bin = fread($file_tmp, 15); //只读15字节 各个不同文件类型，头信息不一样。            fclose($file_tmp);            /* 只针对zip的压缩包进行处理 */            if (true === $this->getTypeList($bin))            {                $result = $this->zip->extractTo($path);                $this->zip->close();                return $result;            }            else            {                return false;            }        }        return false;    }    /**     * 创建压缩文件     *     * @access public     * @param string $zipfile 将要生成的压缩文件路径     * @param strng  $folder  将要被压缩的文件夹路径     * @param array  $ignored 要忽略的文件列表     * @return booleam 压缩包生成成功返回true 否则返回 false    */     public function zip ($zipfile, $folder, $ignored = null) {        $this->ignored_names = is_array($ignored) ? $ignored : $ignored ? array($ignored) : array();        if ($this->zip->open($zipfile, ZIPARCHIVE::CREATE) !== true) {            throw new Exception("cannot open <$zipfile>\n");        }        $folder = substr($folder, -1) == '/' ? substr($folder, 0, strlen($folder)-1) : $folder;        if(strstr($folder, '/')) {            $this->root = substr($folder, 0, strrpos($folder, '/')+1);            $folder = substr($folder, strrpos($folder, '/')+1);        }        $this->createZip($folder);        return $this->zip->close();    }    /**     * 递归添加文件到压缩包     *     * @access private     * @param string $folder 添加到压缩包的文件夹路径     * @param string $parent 添加到压缩包的文件夹上级路径     * @return void    */    private function createZip ($folder, $parent=null) {        $full_path = $this->root . $parent . $folder;        $zip_path = $parent . $folder;        $this->zip->addEmptyDir($zip_path);        $dir = new DirectoryIterator($full_path);        foreach($dir as $file) {            if(!$file->isDot()) {                $filename = $file->getFilename();                if(!in_array($filename, $this->ignored_names)) {                    if($file->isDir()) {                        $this->createZip($filename, $zip_path.'/');                    }else {                        $this->zip->addFile($full_path.'/'.$filename, $zip_path.'/'.$filename);                    }                }            }        }    }    /**     * 读取压缩包文件与目录列表     *     * @access public     * @param string $zipfile 压缩包文件     * @return array 文件与目录列表    */    public function fileList($zipfile) {        $file_dir_list = array();        $file_list = array();        if ($this->zip->open($zipfile) == true) {            for ($i = 0; $i < $this->zip->numFiles; $i++) {                $numfiles = $this->zip->getNameIndex($i);                if (preg_match('/\/$/i', $numfiles))                {                    $file_dir_list[] = $numfiles;                }                else                {                    $file_list[] = $numfiles;                }            }        }        return array('files'=>$file_list, 'dirs'=>$file_dir_list);    }    /**    * 得到文件头与文件类型映射表    *    * @author wengxianhu    * @date 2013-08-10    * @param $bin string 文件的二进制前一段字符    * @return boolean    */    private function getTypeList ($bin)    {        $array = array(            array("504B0304", "zip")        );        foreach ($array as $v)        {            $blen = strlen(pack("H*", $v[0])); //得到文件头标记字节数            $tbin = substr($bin, 0, intval($blen)); ///需要比较文件头长度            if(strtolower($v[0]) == strtolower(array_shift(unpack("H*", $tbin))))            {                return true;            }        }        return false;    }}