Flag icon beside logged in user - php

Question

How to add Flag icons next to logged in username in navbar?
Using Php oop MySQL database on a signup/login system. I have users_country as one of my database columns. This is put in the table as the classic two letter format, example: Netherlands is stored as NL.
After a user logs in I have my nav bar change from sign up, sign in
to usercountry & username, logout
I do that with php
Session start ()
echo $_SESSION[“usercountry”]
echo $_SESSION[“useruid”] (their username)
Now my navbar reads, example:
NLtestuser, logout
How do I go about replacing just the NL country code next to the username in the navbar to be an icon with the corresponding flag.
I would like the user to log in and the flag they selected upon signup will show instead of the flags two digit id.
I already have a flagicons folder in img folder in the root folder that contains all the flag icons with their corresponding countryid.png, example: nl.png
What is the simplest way to just change the country code to the icon flag when the user is logged in?
Thanks.

Answer 1

This is your code reformatted, with the code to show the flag:
<ul class="left-side">
<?php
if(isset($_SESSION["userid"])) {
?>
<li><img src="/img/<?php echo strtolower($_SESSION["usercountry"]); ?>.png" alt="flag"></li>
<li>logout</li>
<?php
} else {
?>
<li><a href='Signin.php'>Sign in</a></li>
<li><a href='signup.php'>Sign up</a></li>
<?php
}
?>
</ul>
Have a look at what the HTML source looks like if the image doesn't show up.