Yii2:Trying to get property of non-object - php

Question

public function actionCreate()
{
$model = new Bookings();
$temp = new RoomTypes();
if ($model->load(Yii::$app->request->post()))
{
$roomtype = $model->room_type;
$totalremain = RoomTypes::find('total_remain')->where(['room_type' => $model->room_type])->one();
if ($roomtype->$totalremain > 0)
{
$imageName = $model->first_name;
$mobile = $model->primary_mobile;
$model->file = UploadedFile::getInstance($model, 'file');
$model->file->saveAs('uploads/id_images/' . $imageName . '_' . $mobile . '.' . $model->file->extension);
//save the path in the db column
$model->id_image = 'uploads/id_images/' . $imageName . '_' . $mobile . '.' . $model->file->extension;
$model->save();
return $this->redirect(['view', 'id' => $model->id]);
}
else
{
echo "This room Types are full ";
}
}
else {
return $this->render('create', [
'model' => $model,
'temp' => $temp,
]);
}
}
I need to check total_remain from Roomtypes model is > 0 from room_types in Bookings model, before submitting the form if user submit the form it should get flash meassage saying "this room are full"
Getting this error, how to solve this
getting error at if ($roomtype->$totalremain > 0)
Room types model
<?php
namespace backend\models;
use Yii;
/**
* This is the model class for table "room_types".
*
* #property integer $id
* #property integer $room_id
* #property string $room_type
* #property integer $total_count
* #property string $description
* #property integer $extra_beds
* #property string $images
* #property string $status
* #property integer $rate
* #property integer $adults_count
* #property integer $child_count
* #property integer $total_people
*/
class RoomTypes extends \yii\db\ActiveRecord
{
/**
* #inheritdoc
*/
public $imageFiles;
public static function tableName()
{
return 'room_types';
}
/**
* #inheritdoc
*/
public function rules()
{
return [
[['room_id','total_booked','total_remain','total_count', 'extra_beds', 'rate', 'adults_count', 'child_count'], 'integer'],
[['status'], 'string'],
[['imageFiles'], 'file', 'skipOnEmpty' => false, 'extensions' => 'png, jpg', 'maxFiles' => 4,'skipOnEmpty' => true, 'on' => 'update-photo-upload'],
[['room_type'], 'string', 'max' => 40],
[['description'], 'string', 'max' => 300],
[['images'], 'string', 'max' => 500]
];
}
/**
* #inheritdoc
*/
public function attributeLabels()
{
return [
'id' => 'ID',
'room_id' => 'Room Number',
'room_type' => 'Room Type',
'total_count' => 'Total Count',
'description' => 'Description',
'extra_beds' => 'Extra Beds',
//'images' => 'Images',
'status' => 'Status',
'rate' => 'Rate',
'adults_count' => 'Adults Count',
'child_count' => 'Child Count',
'total_remain' =>'Remaing Rooms',
'total_booked' => 'Total Rooms Booked',
];
}
}

Answer 1

The code if ($roomtype->$totalremain > 0) is causing the problem.Change it like if ($totalremain->total_remain > 0)