How to pass param from controller to layout in YII2

Question

I want to send a parameter from controller to layout (i.e. main.php). But I am not able to get the param in main.php

I tried:

Controller Code:

Answer 1

I would like to suggest you some steps for this problem.

1. pass parameter to view file
2. Set parameter to view parameter

3. Check For parameter and If exist then use it.

   //in controller method
   $this->render("view-file-name",["paramName" => "some parameter"]);
   
   //in view file for eg: index.php
   //i'm passing paremeter sent form controller's action to view params.
   $this->params["paramFromViewFile"] = $paramName; //here $paramName is the parameter we sent from controller's method
   
   //access parameter sent from view file
   if($this->params && !empty($this->params["paramFromViewFile"]))
   {
        echo $this->params["paramFromViewFile"];  
   }