larvel Validator

Validator验证

控制器验证

// ValidatesRequests trait的validate方法
$this->validator($request,
               [
                   'student.username'=>'required|min:2|max:20',
                   'student.mobile'=>'required|digits:11',
                   'student.sex'=>'required|integer',
               ],['required'=>':attribute为必填项',
                   'min'=>':attribute长度不合法',
                   'integer'=>':attribute长度不合法啊！'
               ],['student.username'=>'用户名',
                   'student.mobile'=>'手机号',
                   'student.sex'=>'性别']
);

// 报错时自动返回错误页面有$errors全局变量
    $errors->all()

Validator门面

 $validator=Validator::make($request->input(),
                [
                    'student.username'=>'required|min:2|max:20|unique:student',
                    'student.mobile'=>'required',
                    'student.sex'=>'required|integer',
                ],['required'=>':attribute为必填项',
                    'min'=>':attribute长度不合法',
                    'integer'=>':attribute长度不合法啊！'
                ],['student.username'=>'用户名',
                    'student.mobile'=>'手机号',
                    'student.sex'=>'性别']
            );
            if($validator->fails()){
                return redirect()->back()->withErrors($validator)->withInput();
            }

// 第一条报错 消息
            $errors=$validator->errors();
            $errors->first(‘student.username’);
//返回输入
    value="{{ old('student')['username'] ? old('student')['username'] : $student->username }}"