how to send html-mail & attachment via php-mail?

hey guys, i'm using php mail (mail(string $to,string $subject,string $message) for sending emails from my website to customers. until now i just sent txt-mails. but from now i want to send a complete html-mailing. the task: 1. you'll find the html-mailing attached here. 2. make me a php-site where php-mail is included. the site should send the here attached html-mailing. thanks