If you want to integrate the Enthusiast Anti-Spam Addon directly into join.php (if you’re including join.php from another file refer to the other tutorial) put the following before any HTML or skinning or includes or anything.

[pre lang="php"]
include 'config.php';

if (defined('ENTH_PATH'))
{
require_once ENTH_PATH .'show_antispam.php';
} else {
if (!isset($_REQUEST['path']))
{
require_once $path .'show_antispam.php';
}
}

$antispam_messages = array();

if( isset( $_POST['join'] ) && $_POST['join'] == 'yes' )
{
$errorstyle = ' style="font-weight: bold; display: block;" ' .
'class="show_join_error"';

if(function_exists('antispamprocedures'))
{
$getantispam = antispamprocedures($errorstyle);

if (is_array($getantispam))
{
if ($getantispam[0] == 'exit')
{
if (!defined('ANTISPAM'))
{
define('ANTISPAM', 1);
}

if ($getantispam[1] != '') $antispam_messages = array($getantispam[1]);

$antispam = $getantispam[1] . antispam();
} else {
if (!defined('ANTISPAM'))
{
define('ANTISPAM', 1);
}

if ($getantispam[1] != '') $antispam_messages = array($getantispam[1]);

$antispam = $getantispam[1] . $getantispam[2];
}
}
}
} else {
if(function_exists('antispam'))
{
if (!defined('ANTISPAM'))
{
define('ANTISPAM', 1);
}

$antispam = antispam();
}
}
?>
[/pre]