Send an email with validation in LemonStand

gistfile1.php

<?php
function send_contact_form() {

	$validation = new Phpr_Validation();
	
	$validation->add('name')->fn('trim')->required('Please enter your name');
	$validation->add('email')->fn('trim')->required('Please enter your email address')->email(false, 'Please enter a valid email address');

	$validation->add('subject')->fn('trim');
	$validation->add('order_no')->fn('trim');
	$validation->add('message')->fn('trim')->required('Please enter a message');

	if(!$validation->validate($_POST))
		$validation->throwException();
	
	
	$template = System_EmailTemplate::create()->find_by_code('shop:contact_form');
	if( ! $template)
		throw new Cms_Exception('Could not find email template with code "shop:contact_form". Please create this email template to send the contact form.');


	$users = Users_User::create()->from('users', 'distinct users.*');
	$users->join('shop_roles', 'shop_roles.id=users.shop_role_id');
	$users->where('shop_roles.name=?', 'Default');
	$users->where('(users.status is null or users.status = 0)');
	$users = $users->find_all();
	if( ! $users->count)
		throw new Cms_Exception('Could not find any people to send to. Please add some users to the "Default" user group.');

		
	try {
		$message = str_replace(
			array(
				'{name}',
				'{email}',
				'{subject}',
				'{order_no}',
				'{message}'
			),
			array(
				$validation->fieldValues['name'],
				$validation->fieldValues['email'],
				$validation->fieldValues['subject'],
				$validation->fieldValues['order_no'],
				nl2br($validation->fieldValues['message']),
			),
			$template->content
		);
		
		$template->send_to_team($users, $message);
	}
	catch (Exception $ex) {
		throw new Cms_Exception($ex->getMessage());
	}
	
}