Some tips needed on updating foreach loop

[Fayozjon]

Hi there!
Can you suggest me i want to update

$this->firebase = new \Firebase\FirebaseLib($DEFAULT_URL, $DEFAULT_TOKEN);
		$uzrs = json_decode($this->firebase->get('users'));
		foreach($uzrs as $user){
		echo "<pre>";	
			 
			
			foreach($user->chat as $msgs){ 
				if($msgs->type=="image"){
				 // HOW TO UPDATE HEREEEEEEEEEEEEEEEEEE

//HOW TO ADD SOME ADDITIONAL INFO AT CURRENT PATH?
			$this->firebase->push($user->chat,['name'=>'TEST','type'=>'text','message'=>'test test']); /// <!---- THIS NOT WORKING
				}
				
			}