Check if $_POST exists
<p>I'm trying to check whether a $_POST exists and if it does, print it inside another string, if not, don't print at all.</p>

<p>something like this:</p>

<pre><code>$fromPerson = '+from%3A'.$_POST['fromPerson'];

function fromPerson() {
    if !($_POST['fromPerson']) {
        print ''
    } else {
        print $fromPerson
    };
}

$newString = fromPerson();
</code></pre>

<p>Any help would be great!</p>
