Check if var exist before unsetting in PHP?
<p>With error reporting on, or even for best practice, when unsetting a variable in PHP, should you check to see if it exist first (in this case it does not always exist) and the unset it, or just unset it?</p>

<pre><code>&lt;?PHP
if (isset($_SESSION['signup_errors'])){
    unset($_SESSION['signup_errors']);
}

// OR

unset($_SESSION['signup_errors']);
?&gt;
</code></pre>
