yii2 hidden input value

Use the following:

echo $form->field($model, 'hidden1')->hiddenInput(['value'=> $value])->label(false);

simple you can write:

<?= $form->field($model, 'hidden1')->hiddenInput(['value'=>'abc value'])->label(false); ?>

You can do it with the options

echo   $form->field($model, 'hidden1', 
      ['options' => ['value'=> 'your value'] ])->hiddenInput()->label(false);

you can also do this

$model->hidden1 = 'your value';// better put it on controller
$form->field($model, 'hidden1')->hiddenInput()->label(false);

this is a better option if you set value on controller

$model = new SomeModelName();

if ($model->load(Yii::$app->request->post()) && $model->save()) {
    return $this->redirect(['view', 'id' => $model->group_id]);
 } else {
    $model->hidden1 = 'your value';
    return $this->render('create', [
        'model' => $model,
    ]);
 }

Like This:

<?= $form->field($model, 'hidden')->hiddenInput(['class' => 'form-control', 'maxlength' => true,])->label(false) ?>

You can use this code line in view(form)

 <?= $form->field($model, 'hidden1')->hiddenInput(['value'=>'your_value'])->label(false) ?>

Please refere this as example

If your need to pass currant date and time as hidden input : Model attribute is 'created_on' and its value is retrieve from date('Y-m-d H:i:s') , just like:"2020-03-10 09:00:00"

  <?= $form->field($model, 'created_on')->hiddenInput(['value'=>date('Y-m-d H:i:s')])->label(false) ?>

<?= $form->field($model, 'hidden_Input')->hiddenInput(['id'=>'hidden_Input','class'=>'form-control','value'=>$token_name])->label(false)?>

or

<input type="hidden" name="test" value="1" />

Use This.

You see, the main question while using hidden input is what kind of data you want to pass? I will assume that you are trying to pass the user ID.
Which is not a really good idea to pass it here because field() method will generate input and the value will be shown to user as we can't hide html from the users browser. This if you really care about security of your website.

please check this link, and you will see that it's impossible to hide value attribute from users to see.

so what to do then?

See, this is the core of OOP in PHP. and I quote from Matt Zandstr in his great book PHP Objects, Patterns, and Practice fifth edition

I am still stuck with a great deal of unwanted flexibility, though. I rely on the client coder to change a ShopProduct object’s properties from their default values. This is problematic in two ways. First, it takes five lines to properly initialize a ShopProduct object, and no coder will thank you for that. Second, I have no way of ensuring that any of the properties are set when a ShopProduct object is initialized. What I need is a method that is called automatically when an object is instantiated from a class.

Please check this example of using __construct() method which is mentioned in his book too.

     class ShopProduct { 
       public $title;   
       public $producerMainName;  
       public $producerFirstName;  
       public $price = 0;
    
       public function __construct($title,$firstName,$mainName,$price) {
            $this->title = $title;
            $this->producerFirstName = $firstName;  
            $this->producerMainName = $mainName; 
            $this->price = $price;
    }
 }
     

$product1 = new ShopProduct("My Antonia","Willa","Cather",5.99 );
print "author: {$product1->getProducer()}\n";

This produces the following:

author: Willa Cather

Class Car {
  private $user_id;
//.. your properties

  public function __construct($title,$firstName,$mainName,$price){
     $this->user_id = \Yii::$app->user->id;
    //..Your magic

   }
}

I know it is old post but sometimes HTML is ok :

<input id="model-field" name="Model[field]" type="hidden" value="<?= $model->field ?>">

Please take care

• id : lower caps with a - and not a _
• name : 1st letter in caps