php面向对象文件上传

文件上传对象：
class upload{
    protected $fileName;
    protected $uploadPath;
    protected $imgFlag;
    protected $maxSize;
    protected $allowExt;
    protected $allowMime;
    protected $fileInfo;
    protected $error;
    protected $ext;
    protected $destnaion;
    protected $uniName;
    public function __construct($fileName='myFile',$uploadPath='./upload',$imgFlag=true,$maxSize=5242880,$allowExt=array('jpeg','jpg','png','gif'),$allowMime=array('image/jpeg','image/png','image/gif')){
        $this->fileName=$fileName;
        $this->maxSize=$maxSize;
        $this->allowMime=$allowMime;
        $this->allowExt=$allowExt;
        $this->uploadPath=$uploadPath;
        $this->imgFlag=$imgFlag;
        $this->fileInfo=$_FILES[$this->fileName];
    }
    protected function checkError(){
        if( !is_null($this->fileInfo)) {
            if ($this->fileInfo['error'] > 0) {
                switch ($this->fileInfo['error']) {
                    case 1:
                        $this->error = '超过PHP配置文件中upload_max_filesize选项的值';
                        break;
                    case 2:
                        $this->error = '超过表单中MAX_FILE_SIZE设置的值';
                        break;
                    case 3:
                        $this->error = '文件部分被上传';
                        break;
                    case 4:
                        $this->error = '没有选择上传文件';
                        break;
                    case 6:
                        $this->error = '没有找到临时目录';
                        break;
                    case 7:
                        $this->error = '文件不可写';
                        break;
                    case 8:
                        $this->error = '由于PHP扩展程序中断文件上传';
                        break;
                }
                return false;
            } else {
                return true;
            }
        }else{
            $this->error='上传文件出错';
        }
    }
    protected function checkSize(){
        if($this->fileInfo['size']>$this->maxSize){
           $this->error='上传文件过大';
           return false;
        }
        return true;
    }
    protected function checkExt(){
        $this->ext=strtolower(pathinfo($this->fileInfo['name'],PATHINFO_EXTENSION));
       if(!in_array($this->ext,$this->allowExt)){
           $this->error='';
           return false;
       }
       return true;
    }
    protected function checkMime(){
      if(!in_array($this->fileInfo['type'],$this->allowMime)){
          $this->error='不允许的文件类型';
          return false;
      }
      return true;
    }
    protected function checkTrueIamge(){
        if($this->imgFlag){
           if(!@getimagesize($this->fileInfo['tmp_name'])){
               $this->error='传输的不是真实图片';
             return false;
           }
           return true;
        }
        return true;
    }
    protected function checkHTTPPost(){
       if(!is_uploaded_file($this->fileInfo['tmp_name'])){
           $this->error='文件不是通过http post方式上传的';
           return false;
       }
       return true;
    }
    protected function showError(){
        exit('<span style="color: red;">'.$this->error.'</span>');
    }
    protected function checkUploadPath(){
        if(!file_exists($this->uploadPath)){
            mkdir($this->uploadPath,0777,true);
        }
    }
    protected function getUniName(){
        return md5(uniqid(microtime(true),true));
    }
    public function uploadFile(){
        if($this->checkError()&&$this->checkSize()&&$this->checkExt()&&$this->checkMime()&&$this->checkTrueIamge()&&$this->checkHTTPPost()){
          $this->checkUploadPath();
          $this->uniName=$this->getUniName();
            $this->destnaion=$this->uploadPath.'/'.$this->uniName.'.'.$this->ext;
          if(@move_uploaded_file($this->fileInfo['tmp_name'],$this->destnaion)){
            return $this->destnaion;
          }else{
              $this->error='文件移动失败';
              $this->checkError();
          }
        }else{
             $this->showError();
        }
    }
}
调用上传文件对象（接受html传值）：

header('content-type:text/html;charset=utf-8');
require_once 'upload.class.php';
$upload=new upload();
$dest=$upload->uploadFile();
echo $dest;