แก้โค้ดให้หน่อยครับ...ดูให้หน่อยครับผมใช้ฟังชั่นทุกป่ะครับ

<?php
//??????????????????????????
$hostname = "localhost"; //?????????
$user = "root"; //??????????
$password = "1234"; //????????
$dbname = "student_ocn"; //?????????????
$tblname = "student_ocn"; //?????????
// ????????????????????
mysql_connect($hostname, $user, $password) or die("?????????????????????");
// ??????????????
mysql_select_db($dbname) or die("????????????????????");
// ?????? SQL ???????????????


$dbquery = mysql_db_query($dbname, $sql);
echo "<Font Size=4><B>????????????????????????</B>";
echo "<Br><A Href=\"show.php\"> ??????????????????</A>"; // ??????????? \ ???? " ???????????? error ????????


	$date = date("d");
	 if($file == "") {{
		$type = getimagesize($file);
		if($type[2] == 1) {
			$pic = $date."_img.gif";
		} else if($type[2] == 2) {
			$pic = $date."_img.jpg";
		}
		copy($file, "pic/$pic");
		chmod("pic/$pic", 0664);
	}
	
	$host="localhost";
	$db_username="root";
	$db_password="1234";
	$dbname="student_ocn";
	$tblname = "student_ocn"; //?????????
	$connect = mysql_connect($host,$db_username,$db_password);
	if(!$connect){
		echo "???????????????????????????"; exit();
	
	$sql = "update $tblname set id_student=id_student, name='$name', nickname ='$nickname ',year='$year', surname='$surname', address='$address',address1='$address1',fac='$fac',major='$major',pic='$pic',
kad  ='$kad ',amout='$amout',fisrt_finish='$fisrt_finish'
,exsample ='$exsample',work_new='$work_new',use_ubu='$use_ubu',tansion='$tansion',day='$day',
birthday='$birthday',age ='$age',phone='$phone ',cellphone='$cellphone' where id_student=$id_student"; 
}// ??????????? SQL ???????????????
 }else{
 $sql = "update $tblname set id_student=id_student, name='$name', nickname ='$nickname ',year='$year', surname='$surname', address='$address',address1='$address1',fac='$fac',major='$major',
kad  ='$kad ',amout='$amout',fisrt_finish='$fisrt_finish'
,exsample ='$exsample',work_new='$work_new',use_ubu='$use_ubu',tansion='$tansion',day='$day',
birthday='$birthday',age ='$age',phone='$phone ',cellphone='$cellphone' where id_student=$id_student"; // ??????????? SQL ???????????????
}
	$dbquery = mysql_db_query($dbname, $sql);

?>