Ajax-php 圖片上傳(已整理)

/**
 *注意，一共有三個地址，假設圖片存儲地址爲“../../AAA/BBB/CCC.jpg”，1、後端定死“../../AAA”,2、前端傳過來“/BBB”，後端生成“/CCC.jpg”
 *本接口，圖片信息使用post傳值，但path參數無法攜帶，故使用get傳path；若您有其他好辦法，還望留言相告
 */


//1、封裝接口類
class uploadImageAjax{
    private $uptypes =[//上傳文件類型列表
        'image/jpg',
        'image/jpeg',
        'image/png',
        'image/pjpeg',
        'image/gif',
        'image/bmp',
        'image/x-png'
    ];
    private $base_name = "/weixinpl/up";
    public $max_upload_size = 2;//2M
    private $save_path = "../../../up";//圖片存儲路徑，基準根路徑
    private $path = "";//上傳文件存儲的文件地址
    private $name = "";//本地文件名稱
    private $type = "";//文件類型
    private $tmp_name = "";//上傳後臨時文件名稱
    private $error = "";//錯誤信息
    private $size = "";//文件大小
    private $new_file_name = "";//新文件名稱
    function __construct($file,$path)
    {
        $this->path = $path;
        $this->save_path = $this->save_path.$path;//拼接保存地址
        if(!file_exists($this->save_path)){//文件夾不存在，創建文件夾
            mkdir($this->save_path);
        }
        $this->name = $file['name'];
        $this->type = $file['type'];
        $this->tmp_name = $file['tmp_name'];
        $this->error = $file['error'];
        $this->size = $file['size'];
        $this->new_file_name = "/".time().".".pathinfo($file["name"])['extension'];
    }

    /**
     * 檢測文件是否通過HTTP上傳
     * @return bool
     */
    public function check_source(){
        if(!is_uploaded_file($this->tmp_name)){
            return false;
        }
        return true;
    }

    /**
     * 檢測文件類型是否允許上傳
     * @return bool
     */
    public function check_type(){
        if(!in_array($this->type, $this->uptypes)){
            return false;
        }
        return true;
    }

    /**
     * 驗證文件大小
     * @return bool
     */
    public function check_size(){
        if($this->size > $this->max_upload_size*1024*1024){
            return false;
        }
        return true;
    }

    /**
     * 移動臨時文件到指定文件夾
     * @return bool|string
     */
    public function upload_image(){
        if(!move_uploaded_file($this->tmp_name, $this->save_path.$this->new_file_name)){
            return false;
        }
        return $this->base_name.$this->path.$this->new_file_name;//返回完整路徑
    }
    function __destruct()
    {
        // TODO: Implement __destruct() method.
    }
}
//2、實例化調用
$model = new uploadImageAjax($_FILES['file'],$_GET['path']);
if(!$model->check_source()){
    echo json_encode([
        'code' => -1,
        'msg' => '文件不存在',
    ]);die;
}
if(!$model->check_type()){
    echo json_encode([
        'code' => -2,
        'msg' => '不允許上傳此類型文件',
    ]);die;
}
if(!$model->check_size()){
    echo json_encode([
        'code' => -3,
        'msg' => "文件不允許超過{$model->max_upload_size}M",
    ]);die;
}
$result = $model->upload_image();
if($result){
    echo json_encode([
        'code' => 1,
        'msg' => '上傳成功',
        'path' => $result
    ]);die;
}else{
    echo json_encode([
        'code' => -4,
        'msg' => '上傳失敗',
    ]);die;
}