# return true if e-mail is formatted like a valid email address
function valid_email($email) {
- return ereg('^[0-9a-zA-Z_~.-]+@[0-9a-zA-Z.-]+\.[a-z]+$', $email) !== false;
+ return ereg('^[0-9a-zA-Z_~.+-]+@[0-9a-zA-Z.-]+\.[a-z]+$', $email) !== false;
}