PHP Coding Help

[moemoe760]

Hey guys, im kinda new to doing php but i do business, so im trying to make the site for the business (i know a bit here and there about web design but php is my downfall)
im just having trouble puting recaptcha into virtumart 1.0.15

the way they have the registration set up there confuses me a bit could someone help me out with understanding it?


<?php
if( !defined( '_VALID_MOS' ) && !defined( '_JEXEC' ) ) die( 'Direct Access to '.basename(__FILE__).' is not allowed.' );
/**
*
* @version $Id: checkout_register_form.php 1612 2009-01-22 20:11:25Z thepisu $
* @package VirtueMart
* @subpackage html
* @copyright Copyright (C) 2004-2008 soeren - All rights reserved.
* @license http://www.gnu.org/copyleft/gpl.html GNU/GPL, see LICENSE.php
* VirtueMart is free software. This version may have been modified pursuant
* to the GNU General Public License, and as distributed it includes or
* is derivative of works licensed under the GNU General Public License or
* other free or open source software licenses.
* See /administrator/components/com_virtuemart/COPYRIGHT.php for copyright notices and details.
*
* http://virtuemart.net
*/
mm_showMyFileName( __FILE__ );
global $mosConfig_allowUserRegistration, $mosConfig_useractivation;
require_once( CLASSPATH . "ps_userfield.php" );
require_once( CLASSPATH . "htmlTools.class.php" );

$missing = vmGet( $_REQUEST, "missing", "" );

if (!empty( $missing )) {
echo "<script type=\"text/javascript\">alert('".$VM_LANG->_('CONTACT_FORM_NC',false)."'); </script>\n";
}

// If not using NO_REGISTRATION, redirect with a warning when Joomla doesn't allow user registration
if ($mosConfig_allowUserRegistration == "0" && VM_REGISTRATION_TYPE != 'NO_REGISTRATION' ) {
$msg = $VM_LANG->_('USER_REGISTRATION_DISABLED');
vmRedirect( $sess->url( 'index.php?page='.HOMEPAGE, true, false ), $msg );
return;
}

if( vmIsJoomla( '1.5' ) ) {
// Set the validation value
$validate = JUtility::getToken();
} else {
$validate = function_exists( 'josspoofvalue' ) ? josSpoofValue(1) : vmSpoofValue(1);
}

$fields = ps_userfield::getUserFields('registration', false, '', false );
// Read-only fields on registration don't make sense.
foreach( $fields as $field ) $field->readonly = 0;
$skip_fields = array();

if ( $my->id > 0 || (VM_REGISTRATION_TYPE != 'NORMAL_REGISTRATION' && VM_REGISTRATION_TYPE != 'OPTIONAL_REGISTRATION'
&& ( $page == 'checkout.index' || $page == 'shop.registration' ) ) ) {
// A listing of fields that are NOT shown
$skip_fields = array( 'username', 'password', 'password2' );
if( $my->id ) {
$skip_fields[] = 'email';
}
}

// This is the part that prints out ALL registration fields!
ps_userfield::listUserFields( $fields, $skip_fields );

echo '
<div align="center">';

if( !$mosConfig_useractivation && @VM_SHOW_REMEMBER_ME_BOX && VM_REGISTRATION_TYPE == 'NORMAL_REGISTRATION' ) {
echo '<input type="checkbox" name="remember" value="yes" id="remember_login2" checked="checked" />
<label for="remember_login2">'. $VM_LANG->_('REMEMBER_ME') .'</label><br /><br />';
}
else {
if( VM_REGISTRATION_TYPE == 'NO_REGISTRATION' ) {
$rmbr = '';
} else {
$rmbr = 'yes';
}
echo '<input type="hidden" name="remember" value="'.$rmbr.'" />';
}
echo '
<input type="submit" value="'. $VM_LANG->_('BUTTON_SEND_REG') . '" class="button" onclick="return( submitregistration());" />
</div>
<input type="hidden" name="Itemid" value="'. $sess->getShopItemid() .'" />
<input type="hidden" name="gid" value="'. $my->gid .'" />
<input type="hidden" name="id" value="'. $my->id .'" />
<input type="hidden" name="user_id" value="'. $my->id .'" />
<input type="hidden" name="option" value="com_virtuemart" />
<input type="hidden" name="' . $validate . '" value="1" />
<input type="hidden" name="useractivation" value="'. $mosConfig_useractivation .'" />
<input type="hidden" name="func" value="shopperadd" />
<input type="hidden" name="page" value="checkout.index" />
</form>';
?>

[resdog]

what are you having a problem understanding?