There is a syntax error on line 25. Code hinting may not work until you fix this error.

Hello everyone. New to the forums and been enjoying Dreamweaver CS5's powerful capabilities up until this point. I'm a little new to PHP, and having a little trouble. I will link the PHP syntax for you guys to take a look at. What I'm trying to make is a PHP file that sends an email for a refer a friend type form. This is line 16-34. Lines 25 and 29 are highlighted red. I'm a bit confused as to the errors given here, so any help would be greatly appreciated. I understand there's no email address in the $to string, I took it out for privacy's sake. Thanks in advance!

<?php
    $yourname = $_POST('yourname');
    $youremail = $_POST('youremail');
    $friendsname = $_POST('friendsname');
    $friendsemail = $_POST('friendsemail');
    $other = $_POST('other');
    
    $to = '';
    $subject = 'Refer a Friend from Whimsical Practicality'
    $msg = "$yourname recommended Whimsical Practicality to $friendsname.\n" .
           "Customer's email address: $youremail\n" .
           "Friend's email address:      $friendsemail\n" .
           "Customer used this description: $other"
    mail($to, $subject, $msg, 'From:' . $yourname);
    
    echo 'Thanks for recommending us!<br />';
    echo 'Your recommendation has been sent.<br />';
    echo 'Please use the Back button to return to the previous page.<br />';       
?>