Using ob_start to email $account when user logs in

<?
function spammy_user ($op, &$edit, &$account, $category = NULL) {

    if($op=="login") {
        $to = "webmaster@zerotouch.com";
        $subject = "User Login!" . $op;
        
        ob_start();
        print_r($account);
        $mike = ob_get_clean();         

        $body = "Hi,\n\nYou've logged in!";
        $body .= $mike;
        mail($to, $subject, $body);
        
    } elseif ($op=="logout") {
        $to = "webmaster@zerotouch.com";
        $subject = "User Logout!" . $op;
        $body = "Hi,\n\nYou've logged out!";
        mail($to, $subject, $body);
    
    }
}
?>