How to fix the "Undefined variable" error in Yii2 view? - php

Question

Here is my controller:
class RoomController extends Controller
{
public function actionCreate()
{
$model = new Room();
$modelSave = false;
if ($model->load(Yii::$app->request->post()) && $model->validate()) {
}
return $this->render('create', ['model' => $model,'modelSaved' => $modelSave]);
}
}
and here is my view
<?php if($modelSave) { ?>
<div class = "alert alert-success" >
Model ready to be saved!
</div>
<?php } ?>
<?php $form = ActiveForm::begin(); ?>
<div class="row">
<div class = "col-lg-12">
<h1>Room Form</h1>
<?= $form->field($model,'floor')->textinput()?>
<?= $form->field($model,'room_number')->textinput() ?>
<?= $form->field($model,'has_conditioner')->checkbox() ?>
<?= $form->field($model,'has_tv')->checkbox() ?>
<?= $form->field($model,'has_phone')->checkbox() ?>
<?= $form->field($model,'available_form')->textinput() ?>
<?= $form->field($model,'price_per_day')->textinput() ?>
<?= $form->field($model,'description')->textarea() ?>
</div>
</div>
<div class="form-group">
<?= Html::submitButton('create',['class'=>'btn btn-success']) ?>
</div>
<?php ActiveForm::end(); ?>
when i checked whether if it working,
the ErrorException shows:
PHP Notice – yii\base\ErrorException
Undefined variable: modelSave
I've tried to debug, but I have no idea why the $modelSave can't send to the view "create".

Answer 1

You test
<?php if($modelSave) { ?>
but in your render you have
return $this->render('create', ['model' => $model,'modelSaved' => $modelSave]);
use
<?php if($modelSaved) { ?>

Answer 2

You don't call the variable by its name, you should try to check $modelSaved since this is the name you give it
replace
<?php if($modelSave) { ?>
by
<?php if($modelSaved) { ?>