แปลงวันที่ php

function ThaiDateLong($date) {  
$_month_name = array("01"=>"มกราคม","02"=>"กุมภาพันธ์",
"03"=>"มีนาคม","04"=>"เมษายน","05"=>"พฤษภาคม",
"06"=>"มิถุนายน","07"=>"กรกฏาคม","08"=>"สิงหาคม",
"09"=>"กันยายน","10"=>"ตุลาคม","11"=>"พฤศจิกายน",
"12"=>"ธันวาคม");
$yy=substr($date,0,4);$mm=substr($date,5,2);$dd=substr($date,8,2);$time=substr($date,11,8);
$yy+=543;
// $dateT=intval($dd)." ".$_month_name[$mm]." ".$yy." ".$time;
$dateT=intval($dd)." ".$_month_name[$mm]." พ.ศ. ".$yy;
  return $dateT;
}     //echo ThaiEachDate("2008-05-19");

function ThaiDate($date){
$_month_name = array("01"=>"ม.ค.","02"=>"ก.พ.","03"=>"มี.ค.","04"=>"เม.ย.","05"=>"พ.ค.","06"=>"มิ.ย.","07"=>"ก.ค.","08"=>"ส.ค.","09"=>"ก.ย.","10"=>"ต.ค.","11"=>"พ.ย.","12"=>"ธ.ค.");
$yy=substr($date,0,4);$mm=substr($date,5,2);$dd=substr($date,8,2);$time=substr($date,11,8);
$yy+=543;
$dateT=intval($dd)." ".$_month_name[$mm]." ".$yy." ".$time;
// $dateT=intval($dd)." ".$_month_name[$mm]." ".$yy;
return $dateT;
}

function redirect 'n alert

function redirect($url){
echo "<script type=\"text/javascript\">window.location='".$url."'</script>";
}

function alert_text($msg){
echo "<script type=\"text/javascript\">alert('$msg') </script>";
}

Login PHP

$username = $_POST[username];
$password = $_POST[password];
$sql="select * from personal where id='$username' and password='$password'";
$result=mysql_query($sql) or die(mysql_error());
$num=mysql_num_rows($result);

if($num == 0)
{
die("<script>
alert('รหัสประจำตัวหรือรหัสผ่านไม่ถูกต้อง');
history.back();
</script>");
}
$_SESSION['login'] = true;
$_SESSION['personal'] = mysql_fetch_assoc($result);
session_write_close();
redirect('index.php');
exit();