PHP Syntax error unexpected "," with $_POST : <p>I'm a PHP beginner and I have a problem: when I use this:</p>

<pre><code>if(isset($_POST['doc_lang'], $_POST['doc_title'], $_POST['doc_header'], $_POST['doc_body'], $_POST['doc_footer']) AND !empty($_POST['doc_lang'], $_POST['doc_title'], $_POST['doc_header'], $_POST['doc_body'], $_POST['doc_footer']))
</code></pre>

<p>I have this error: Parse error: syntax error, unexpected ',' in (...)/WebDoc.php on line 3.</p>

<p>What is the correct syntax? Thank</p>
