Different submenus if SQL result is empty - php

Question

I have a menu with different submenus, where I want to show a different specific sub-submenu if the SQL result is empty or not.
If the username (the session username) exist in that database, it will output the firstname and lastname, since $result is not empty. However, if I login to an account that does not have the username in that database, I does not output the <li class='last'><span>SubSub1: EMPTY RESULT</span></li>.
It just outputs this:
<li class='active has-sub'><span>Sub1</span>
<ul>
</li>
</ul>
When it should have been:
<li class='active has-sub'><span>Sub1</span>
<ul>
<li class='last'><span>SubSub1: EMPTY RESULT</span></li>
</ul>
Why does it come out empty? What am I doing wrong?
<form action="user.php" method="GET">
<div id="cssmenu">
<ul>
<li class='active has-sub'><a href='#'><span><?php echo htmlentities($_SESSION['username'], ENT_QUOTES, 'UTF-8'); ?></span></a>
<ul>
<tr>
<li class='last'><span>Menu1</span></li>
<li class='last'><span>Menu2</span></li>
<li class='active has-sub'><span>Menu3</span>
<ul>
<li class='active has-sub'><span>Sub1</span>
<ul>
<?php
require('connections/db_connection.php');
$username = $_SESSION['username'];
$sql = "SELECT name, lastname FROM servers";
$sql .= " WHERE username = '$username'";
$result = $connection->query($sql);
while($row = $result->fetch_assoc()){
$name = $row['name'];
$lastname = $row['lastname'];
if (empty($result)){
?>
<li class='last'><span>SubSub1: EMPTY RESULT</span></li>
<?php
}else{
?>
<li class='last'><a href=""><span>SubSub1: <?php echo $name; ?><br>
Last name: <?php echo $lastname; ?></span></a></li>
<li class='last'><span>SubSub2</span></li>
<?php
}
}
$connection->close();
?>
</li>
</ul>
<li class='last'><span>Sub2</span></li>
<li class='last'><span>Sub3</span></li>
</li>
</ul>
<li class='last'><span>Logout</span></li>
</tr>
</ul>
</li>
</ul>
</div>
</form>

Answer 1

If your $result is empty - you will never enter
while($row = $result->fetch_assoc())
as there's nothing to fetch.
So I suppose you should check number of returned rows. Number will be 1 if a user is found in your database and 0 - otherwise.
So code can be like this (I suppose you use mylsqi):
$result = $connection->query($sql);
if (0 < $result->num_rows) {
$row = $result->fetch_assoc(); // you can fetch only one result if you're sure that there's only one user;
$name = $row['name'];
$lastname = $row['lastname'];?>
<li class='last'><a href="">
<span>SubSub1: <?php echo $name; ?><br>
Last name: <?php echo $lastname; ?>
</span>
</a></li>
<li class='last'><span>SubSub2</span></li>
<?php
} else {
// no user found:?>
<li class='last'><span>SubSub1: EMPTY RESULT</span></li>
<?php
}
And be the way:
</li>
</ul>
Remove this </li> as you already closing li in your ifs.