PHP - Filter some words

Posted by bob on Stack Overflow See other posts from Stack Overflow or by bob
Published on 2010-03-12T06:25:20Z Indexed on 2010/03/12 6:27 UTC
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php

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arrays

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beginner

I want to filter some reserved word on my title form.

$adtitle = sanitize($_POST['title']);
$ignore = array('sale','buy','rent');
if(in_array($adtitle, $ignore)) {
$_SESSION['ignore_error'] = '<strong>'.$adtitle.'</strong> cannot be use as your title';
header('Location:/submit/');
exit;

How to make something like this. If user type Car for sale the sale will detected as reserved keyword.
Now my current code only detect single keyword only.

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