PHP檔案上傳類應用____PHP

<?php /***   步驟:*       1.匯入inlcude本類檔案,如下函數upload 配置儲存路徑*       2.直接運用，配合前台，運行函數,注意前台form開啟enctype*       3.若運行成功，轉運檔案至指定目錄，獲得傳回值url物理全路徑*       4.把指定儲存的路徑存入資料庫*/    /**    *   檔案上傳函數，把檔案儲存到指定路徑    *   @param     *       $filename:表單裡寫的檔案名稱 name="XXX" ，會自動識別$_FILES    *   @return 成功返回圖片儲存物理全路徑，失敗返回false    */    function upload($filename){        include_once(__ROOT__.'/common/Upload.class.php');//引入類檔案        $path  = __ROOT__."/public/upload/".date("Y-m-d",time());//定義路徑        $upload = new upload($filename,$path);//執行個體化對象        $url  = $upload->uploadFile();//調用成員方法，成功返回儲存的物理地址        if(empty($url)){            return false;        }        return $url;    }/**    *   修改會員資訊    *   @param $id 哪位會員 $data修改的值[數組形式]    *   @return 成功返回影響行數 ；失敗返回false    */    function update_user($id,$data){        $info = get_user($id);//查詢出此友情連結的資訊        //判斷有刪除圖片操作,清空圖片地址        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']);//先刪除原來檔案exit;            $url = upload('user_img');//移動檔案            if($url === false){                return false;            }            $data['user_img'] = strstr($url,"upload");//賦新地址值        }        $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){            return true;        }        return false;    }//--------------------------以上為類的應用方法----------------------//------------------------------類開始-----------------------------    class Upload{        protected $fileName;   //檔案名稱        protected $maxSize;  //檔案最大大小        protected $allowMime; //允許的圖片範圍        protected $allowExt;   //允許的檔案尾碼名        protected $uploadPath; //設定檔案上傳路徑        protected $imgFlag;        //是否開啟檢測真實映像        protected $fileInfo;           protected $error;//返回的檔案錯誤        protected $ext; //擷取的檔案尾碼        public function __construct($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[$this->fileName];        }        /**         * 檢測上傳檔案是否出錯         * @return boolean         */        protected function checkError(){            if(!is_null($this->fileInfo)){                if($this->fileInfo['error']>0){                    switch($this->fileInfo['error']){                        case 1:                            $this->error='超過了PHP設定檔中upload_max_filesize選項的值';                            break;                        case 2:                            $this->error='超過了表單中MAX_FILE_SIZE設定的值';                            break;                        case 3:                            $this->error='檔案部分被上傳';                            break;                        case 4:                            $this->error='沒有選擇上傳檔案';                            break;                        case 6:                            $this->error='沒有找到臨時目錄';                            break;                        case 7:                            $this->error='檔案不可寫';                            break;                        case 8:                            $this->error='由於PHP的擴充程式中斷檔案上傳';                            break;                    }                    return false;                }else{                    return true;                }            }else{                $this->error='檔案上傳出錯';                return false;            }        }        /**         * 檢測上傳檔案的大小         * @return boolean         */        protected function checkSize(){            if($this->fileInfo['size']>$this->maxSize){                $this->error='上傳檔案過大';                return false;            }            return true;        }        /**         * 檢測副檔名s         * @return boolean         */        protected function checkExt(){            $this->ext=strtolower(pathinfo($this->fileInfo['name'],PATHINFO_EXTENSION));            if(!in_array($this->ext,$this->allowExt)){                $this->error='不允許的副檔名';                return false;            }            return true;        }        /**         * 檢測檔案的類型         * @return boolean         */        protected function checkMime(){            if(!in_array($this->fileInfo['type'],$this->allowMime)){                $this->error='不允許的檔案類型';                return false;            }            return true;        }        /**         * 檢測是否是真實圖片         * @return boolean         */        protected function checkTrueImg(){            if($this->imgFlag){                if(!@getimagesize($this->fileInfo['tmp_name'])){                    $this->error='不是真實圖片';                    return false;                }                return true;            }        }        /**         * 檢測是否通過HTTP POST方式上傳上來的         * @return boolean         */        protected function checkHTTPPost(){            if(!is_uploaded_file($this->fileInfo['tmp_name'])){                $this->error='檔案不是通過HTTP POST方式上傳上來的';                return false;            }            return true;        }        /**         *顯示錯誤          */        protected function showError(){            exit('<span style="color:red">'.$this->error.'</span>');        }        /**         * 檢測目錄不存在則建立         */        protected function checkUploadPath(){            if(!file_exists($this->uploadPath)){                mkdir($this->uploadPath,0777,true);            }        }        /**         * 產生唯一字串         * @return string         */        protected function getUniName(){            return md5(uniqid(microtime(true),true));        }        /**         * 上傳檔案         * @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='檔案移動失敗';                    $this->showError();                }            }else{                $this->showError();            }        }    }