폼메일을 어떻게 만들죠 채택완료

<?
include_once("$g4[path]/lib/mailer.lib.php");
if ($mail) {
    check_token();

    $from_name  = "예약상담";
    $from_email = "mail@mail";
    $email = explode(",", $mail);
 $sub = "$name, $gbeovhs, $pay, $memo";
    for ($i=0; $i<count($email); $i++)
        mailer($from_name, $from_email, trim($email[$i]), "예약상담", $sub);

    echo <<<HEREDOC
    <SCRIPT type="text/javascript">
        alert("예약상담이 접수 되었습니다.");
    </SCRIPT>
HEREDOC;
}

$token = get_token();
?>
<form name=fsendmailtest method=post>
<input type=hidden name=token value='<?=$token?>'>

<style>
 td, input{font-size:8pt}
</style>

<table width=280 border=0 align=center cellpadding="0" cellspacing="0">
  <tr><td colspan="5"></td></tr>
   <tr>
  <td width="71" height="10">
  <td width="209">
 <tr>
 <tr>
  <td width="71" height="30">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;이름
  <td width="209"><input type=text name=name size=10 required itemname='이름'>
  <tr>
  <td height="30">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;연락처
  <td><input type=text name=gbeovhs size=30 class='field' required itemname='연락처'>
 <tr>
   <td height="30">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;메모1     
   <td><input type="text" name="pay" size="30" />         
    <tr>
  <td height="30">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;메모2
  <td colspan=3><input name="memo" type="text" value="" size="30" />
 
    <tr>
    <td>
    <td colspan=3 style="display:none;"><input type=text class=ed name=mail size=30 required itemname="E-mail" value="mail@gmail.com"> <!--전송받을 이메일 -->
    <tr>
  <td height="30" colspan=4 align=center><input type=submit value=' 예약상담 '>
</table>
</form>​

그누4버전인데요. 5버전으로 변경을 어떻게하는게 좋을까요?