PHP文件上传类应用

<?php/*** 步骤:* 1.导入inlcude本类文件,如下函数upload 配置存储路径* 2.直接运用，配合前台，运行函数,注意前台form打开enctype* 3.若运行成功，转运文件至指定目录，获得返回值url物理全路径* 4.把指定存储的路径存入数据库*//** * 文件上传函数，把文件保存到指定路径 *@param * $filename:表单里写的文件名称 name="XXX" ，会自动识别$_FILES * @return 成功返回图片存储物理全路径，失败返回false */ function upload($filename){ include_once(__ROOT__.'/common/Upload.class.php');//引入类文件 $path = __ROOT__."/public/upload/".date("Y-m-d",time());//定义路径 $upload = new upload($filename,$path);//实例化对象 $url = $upload->uploadFile();//调用成员方法，成功返回保存的物理地址if(empty($url)){returnfalse; } return $url; }/** * 修改会员信息 *@param $id 哪位会员 $data修改的值[数组形式] * @return 成功返回影响行数 ；失败返回false */ function update_user($id,$data){ $info = get_user($id);//查询出此友情链接的信息//判断有删除图片操作,清空图片地址if(@$data['del_pic']){ unlink(__ROOT__.'/public/'.$info['user_img']); unset($data['del_pic']); $data['user_img'] = " "; } if(!empty($_FILES['user_img']['name'])){@unlink(__ROOT__."/public/".$info['user_img']);//先删除原来文件exit; $url = upload('user_img');//移动文件if($url === false){returnfalse; } $data['user_img'] = strstr($url,"upload");//赋新地址值 } $user = M('cms_user'); $data['password'] = md6($data['password'] ); $where = " user_id = $id "; $re = $user->where($where)->data($data)->update(); // echo $link->getLastSql();exit;if($re){returntrue; } returnfalse; }//--------------------------以上为类的应用方法----------------------//------------------------------类开始----------------------------- class Upload{ protected $fileName; //文件名称protected $maxSize; //文件最大大小protected $allowMime; //允许的图片范围protected $allowExt; //允许的文件后缀名protected $uploadPath; //设置文件上传路径protected $imgFlag; //是否开启检测真实图像protected $fileInfo; protected $error;//返回的文件错误protected $ext; //获取的文件后缀public function __construct($fileName='myFile',$uploadPath='./uploads',$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[$this->fileName]; } /** * 检测上传文件是否出错 * @return boolean */protected function checkError(){if(!is_null($this->fileInfo)){if($this->fileInfo['error']>0){switch($this->fileInfo['error']){case1: $this->error='超过了PHP配置文件中upload_max_filesize选项的值';break;case2: $this->error='超过了表单中MAX_FILE_SIZE设置的值';break;case3: $this->error='文件部分被上传';break;case4: $this->error='没有选择上传文件';break;case6: $this->error='没有找到临时目录';break;case7: $this->error='文件不可写';break;case8: $this->error='由于PHP的扩展程序中断文件上传';break; } returnfalse; }else{returntrue; } }else{ $this->error='文件上传出错';returnfalse; } } /** * 检测上传文件的大小 * @return boolean */protected function checkSize(){if($this->fileInfo['size']>$this->maxSize){ $this->error='上传文件过大';returnfalse; } returntrue; } /** * 检测扩展名s * @return boolean */protected function checkExt(){ $this->ext=strtolower(pathinfo($this->fileInfo['name'],PATHINFO_EXTENSION));if(!in_array($this->ext,$this->allowExt)){ $this->error='不允许的扩展名';returnfalse; } returntrue; } /** * 检测文件的类型 * @return boolean */protected function checkMime(){if(!in_array($this->fileInfo['type'],$this->allowMime)){ $this->error='不允许的文件类型';returnfalse; } returntrue; } /** * 检测是否是真实图片 * @return boolean */protected function checkTrueImg(){if($this->imgFlag){if(!@getimagesize($this->fileInfo['tmp_name'])){ $this->error='不是真实图片';returnfalse; } returntrue; } } /** * 检测是否通过HTTP POST方式上传上来的 * @return boolean */protected function checkHTTPPost(){if(!is_uploaded_file($this->fileInfo['tmp_name'])){ $this->error='文件不是通过HTTP POST方式上传上来的';returnfalse; } returntrue; } /** *显示错误 */protected function showError(){ exit('<span style="color:red">'.$this->error.'</span>'); } /** * 检测目录不存在则创建 */protected function checkUploadPath(){if(!file_exists($this->uploadPath)){ mkdir($this->uploadPath,0777,true); } } /** * 产生唯一字符串 * @return string */protected function getUniName(){return md5(uniqid(microtime(true),true)); } /** * 上传文件 * @return string */public function uploadFile(){if($this->checkError()&&$this->checkSize()&&$this->checkExt()&&$this->checkMime()&&$this->checkTrueImg()&&$this->checkHTTPPost()){ $this->checkUploadPath(); $this->uniName=$this->getUniName(); $this->destination=$this->uploadPath.'/'.$this->uniName.'.'.$this->ext;if(@move_uploaded_file($this->fileInfo['tmp_name'], $this->destination)){return $this->destination; }else{ $this->error='文件移动失败'; $this->showError(); } }else{ $this->showError(); } } }