PHP Code:
$avatar = vB_Api::instanceInternal('user')->fetchAvatar(vB5_User::get('userid'));
$user['avatarpath'] = $avatar['avatarpath'];
if (!vB5_User::get('userid') OR vB5_User::get('userid')==0) {
echo '<img src="/images/misc/signup.png" alt="sign up" />';
} else {
echo '<span style="color: red; height:50px; width:50px;">Welcome back,'. vB5_User::get('username') .'!</span>';
echo '<img src="'. $user['avatarpath'] .'" width="50" height="50" />';
}