<?php 
# query comes from GET request parameter 'q'
$input = $this->params['url']['q'];

# sanitize the query
App::import('Sanitize');
$q = Sanitize::escape($input);

# we are searching a table called 'listings'
$options['conditions'] = array(
   "MATCH(Listing.title,Listing.description) 
          AGAINST('$q' IN BOOLEAN MODE)"
);

$this->set(array('results' => $this->paginate('Listing', $options)));
?>