Passing by reference from Foreach loop

passing_by_reference.php

<?php

class test
{
  public function addDescription(&$data)
  {
     $data['description'] = 'Hello World!';
  }
	
  public function printMessages()
  {
     $messages = [
	 ['code' => 200],
	 ['code' => 200],
	 ['code' => 200],
         ['code' => 200],
    ];
	  
	  
	 foreach($messages as &$message) {
		 $this->addDescription($message);
	 }
	  
	 var_dump($messages);
  }
}


(new Test())->printMessages();