获取cookie

设置session

获取session

检测是否存在某个session值

删除数据

$input = $request->input();
$validator = validator($input,[
    'type'=>'required',
    'a' => 'required',
],[
    'type.required' => '类型必填',
    'a.required' => '必填',
]);
if ($validator->passes()){
//写逻辑
}else{
    return ['status'=>400,'msg'=>$validator->errors()->first()];
}

https://learnku.com/docs/laravel/5.5/validation/1302#rule-url 详细的请看这里