it defenetley is not. This would work, but use single quotes instead of double quotes in the HTML:
echo "<img height='150' width='200' src='http://localhost/images/".$info['photo']."' /><br />";
Or this will work with double quotes in the HTML but single quotes in PHP:
echo '<img height="150" width="200" src="http://localhost/images/'.$info['photo'].'" /><br />';
Notice that I added a / in the end of img and br tags as well, that is also for XML/XHTML.