php strpos not returning any value
<p>So, my website is getting a significant amount of spam.</p>

<p>To filter out some of it, I wanted to test the body of the post to make sure it doesn't contain certain words. If they do, give the user an instant (temporary) ban. </p>

<p>Included is my code. I added an echo line to show the position returned, and tested with posts which did or did not include test words. For whatever reason, it always returns null, and nothing is displayed. Am I not allowed to pass a $_POST variable into this function?</p>

<p>Code: </p>

<pre><code>    $bannedwords = array ("spam word", "foo", "bar", "foobar", "quarry");
foreach ($bannedwords as $bannedphrase) {
    $pos = strpos($_POST['body'], $bannedphrase);
    echo 'The position is: ' . $pos;
    if ($pos === FALSE){            
        //require_once 'inc/mod/ban.php';
        //Bans::new_ban($_SERVER['REMOTE_ADDR'], 'Suspected Spammer.', '2', $_POST['board'] == '*' ? false : $_POST['board']);
        error($config['error']['bannedword']);
    }       
}
</code></pre>

<p>EDIT: I do see a logic error here, though I don't think its what breaks the code. Maybe it is, however. If a user is banned early into the array, the if statement continues, which could be the reason I am seeing a null value later on? </p>