How to get email address from a long string

Question

In PHP, I have a string like this:

$string = \"user@domain.com MIME-Version: bla bla bla\";

How do i get the email address only? Is there a

Answer 1

Updating @Rob Locken's answers:

function extract_email_address ($string) {
   $emails = array();
   $string = str_replace("\r\n",' ',$string);
   $string = str_replace("\n",' ',$string);

   foreach(preg_split('/ /', $string) as $token) {
        $email = filter_var($token, FILTER_VALIDATE_EMAIL);
        if ($email !== false) { 
            $emails[] = $email;
        }
    }
    return $emails;
}