<?php
class uploadfile {
    /**
     * 该类支持多文件上传
     * 使用：初始化时参数$files的值为$_FILES数组，$dir值为上传文件新建目录
     * 通过setMaxSize($size)设定上传文件最大值，setType($type)设定上传文件类型，其中$type为字符串，如：gif|jpg|txt|doc
     * 主函数moveuploadfile(),上传到某一文件出错时显示错误信息并继续执行上传
     * @var unknown_type
     */
    private $_files;
    private $_ddir;  //设定文件上传后的目录，要求不含斜杠
    private $_type;  //上传文件类型数组
    private $_errors;
    private $_maxsize = 10240000;  //设定上传文件最大大小  默认10M  单位字节
    public  function __construct($files,$dir){
        $this->_files = $files;
        $dir = str_replace("/","",$dir);
        $this->_ddir = trim($dir);
    }
    /**
     * 设定上传文件的最大值
     * 单位byte
     *
     * @param 无返回值
     */
    public function setMaxSize($size){
        $this->_maxsize = $size;
    }
    /**
     * 限定上传文件的类型
     * $type必需为如：gif|jpg|pdf|txt 等一系列由｜及文件后缀名连接的字符串
     * @param 无返回值
     */
    public function setType($type){
        $this->_type = explode("|",$type);
    }
    /**
     * 获取文件的后缀名
     * @param $type＝$file["type"]
     * @return $suffix
     */
    public function getSuffix($name){
        $pos = strpos($name,".")+1;
        $suffix = substr($name,$pos);
        return $suffix;
    }
    /**
     * 检查错误
     * @return 错误信息
     */
    public function checkError($file){
            if ($file[1]["size"]>$this->_maxsize) {
                $this->_errors[] = "Too large the file is!";
                return false;
            }
            if (!in_array($this->getSuffix($file[1]["name"]),$this->_type)) {
                $this->_errors[] = "Type of the file is wrong!";
                return false;
            }
            switch ($file[1]["error"]){
                case 0: {$this->_errors[] = "";return true;break;}
                case 1: {$this->_errors[] = "Length of the file is out of the value of upload_max_filesize!";return false;break;}
                case 2: {$this->_errors[] = "Length of the file is out of the value of MAX_FILE_SIZE!";return false;break;}
                case 3: {$this->_errors[] = "Upload has been broken up!";return false;break;}
                case 4: {$this->_errors[] = "The upload file is null!";return false;break;}
                default: {$this->_errors[] = "Other reason!";return false;}
            }
            return true;
    }
    /**
     * 上传主函数
     * @author guofang
     * @date 08/26/2008
     * @return 出错时显示错误信息
     *
     */
    public function moveuploadfile(){
        if (!is_dir(realpath(".")."\\".$this->_ddir)) {
            mkdir(realpath(".")."\\".$this->_ddir);
        }
        while ($file = each($this->_files)) {
            if (empty($file[1]["name"])) {
                continue;
            }
            if (!$this->checkError($file)||!move_uploaded_file($file[1]["tmp_name"],realpath(".")."\\".$this->_ddir."\\".$file[1]["name"])) {
                foreach ($this->_errors as $error){
                    echo "<br>Failed:<font color=red>$error</font>";
                }
                continue;
            }
        }
        return "Complete!";
    }
}