How do check if a PHP session is empty?
<p>Is this bad practice?</p>

<pre><code>if ($_SESSION['something'] == '') {
    echo 'the session is empty';
}
</code></pre>

<p>Is there a way to check if its empty or it is not set? I'm actualy doing this:</p>

<pre><code>if ($_SESSION['something'] == '' || ! isset($_SESSION['something'])) {
    echo 'the session is either empty or doesn\'t exist';
}
</code></pre>

<p>Does <code>! isset</code> just checks if a <code>$_SESSION</code> exist and doesn't check if there are values in the array?</p>
