PHP: How to check if a var has been initiliazed? isset returns false when the var has been set to NULL
<pre><code>&lt;?php
    $var = NULL;

    var_dump(isset($var)); // bool(false)
    var_dump(isset($unset_var)); // bool(false)
?&gt;
</code></pre>

<p>isset($var) should return TRUE, since it has been set to NULL.</p>

<p>Is there any way to check for this?</p>

<p>Thanks!</p>
