超链接标记在php中无法正确打印

Please check this (I'm new to PHP), I just want to add an image to an existing php code for the nav menu.

Previous code is

$html .= "<li>
 <a href='".$menu['items'][$itemId]->menu_link."'>".$menu['items'][$itemId]->display_name."</a>
</li> 
";

Which is displaying correct with the Menu name, and here i want to put an image so my code is as below

$html .= "<li>
 <a href='".$menu['items'][$itemId]->menu_link."'><img src='../assets/img/live_view.png'/>".$menu['items'][$itemId]->display_name."</a>
</li> 
";

Its not displaying the image correctly but has no errors, is there any fix ?