แก้อย่างไรจะให้บันทึกได้เป็น thai windows แบบ php และเรียกตัวใช้งานเก่าได้อย่างไรและบันทึกในเครื่องแล้วไม่หาย

<?php

$dayweek = array(1 => "Sunday",
        2 => "Monday",
        3 => "Tuesday",
        4 => "Wednesday",
        5 => "Thursday",
        6 => "Friday",
        7 => "Satuday");

$dayweekThai = array(1 => "ÇѹÍÒ·ÔµÂì",
        2 => "Çѹ¨Ñ¹·Ãì",
        3 => "ÇѹÍѧ¤ÒÃ",
        4 => "Çѹ¾Ø¸",
        5 => "Çѹ¾ÄËÑÊ",
        6 => "ÇѹÈØ¡Ãì",
        7 => "ÇѹàÊÒÃì");

        function showtime($getleveltime)  // input
        {
            switch($getleveltime) 
            
            {
                    case '1' : $showtime ="08:00:00"; break;
                    case '2' : $showtime ="08:50:00"; break;
                    case '3' : $showtime ="09:40:00"; break;
                    case '4' :$showtime ="10:30:00";  break;       
                    case '5' :$showtime ="11:20:00";  break;
                    case '6' :$showtime ="12:10:00";  break;
                    case '7' :$showtime ="13:10:00";  break;
                    case '8' :$showtime ="14:00:00";  break;
                    case '9' :$showtime ="14:50:00";  break;
                    case '10' :$showtime ="15:40:00";  break;
                    case '11' :$showtime ="16:30:00"; break;
                    case '12' :$showtime ="17:20:00"; break;
                    case '13' :$showtime ="18:10:00"; break;
                    case '14' :$showtime ="19:00:00"; break;
                    case '15' :$showtime ="19:50:00"; break;
            }
            return $showtime;
        }

                function timeennrolloff($getleveltime)  // input
        {
            switch($getleveltime) 
            
            {
                    
                    case '1' :$showtime = "08:50:00"; break;
                    case '2' :$showtime ="09:40:00"; break;
                    case '3' :$showtime ="10:30:00";  break;       
                    case '4' :$showtime ="11:20:00";  break;
                    case '5' :$showtime ="12:10:00";  break;
                    case '6' :$showtime ="13:10:00";  break;
                    case '7' :$showtime ="14:00:00";  break;
                    case '8' :$showtime ="14:50:00";  break;
                    case '9' :$showtime ="15:40:00";  break;
                    case '10' :$showtime ="16:30:00"; break;
                    case '11' :$showtime ="17:20:00"; break;
                    case '12' :$showtime ="18:10:00"; break;
                    case '13' :$showtime ="19:00:00"; break;
                    case '14' :$showtime ="19:50:00"; break;
                    case '15' :$showtime ="20:40:00"; break;
            }
            return $showtime;
        }

        
        
        Function Datediff($datefrom,$dateto)
      {
         $startDate = strtotime($datefrom);
         $lastDate = strtotime($dateto);
        
        $differnce = $startDate - $lastDate;

       // $differnce = ($differnce / (60*60*24)); //???????????????? return ????????????????

        return $differnce;
      }

      
function dayofweek($datestr)
{
$datearr = explode("-", $datestr); 
$datestamp=mktime(0,0,0,$datearr[1],$datearr[2],$datearr[0]); 
$date = getdate($datestamp); 
$dayofweek = $date["weekday"]; 
return $dayofweek;
}      
      //

     global $config,$usersess,$comm,$lang,$dataset,$picUpload,$file;        
    require_once("header.inc");           
    require_once ("config.inc.php");           
    require_once ("include/variables.inc.php");     
         // ??????? ???? ----------------------------------------------------------------------------
     require_once ("global.inc.php");        
     require_once ("include/mysql.inc.php"); 
     require_once("include/myclass/mclasses.inc.php");  // Call my Class
     require_once("include/myclass/dataset.inc.php"); // Call Data Base
     require_once("include/myclass/components.inc.php"); // Call Data Base          
     $stuid   =  $_GET['stuid']; 
     $classid = $_GET['classid'];
     
     ///
     
          $Tstudentid = db_getvar('studentmaster',"STUDENTCODE=$studentid","STUDENTID");  
         @mysql_connect($host,$user,$pwd); // ?????????
 $sql_temp = "    
        SELECT `enrollitem`.studentid, `enrollitem`.classid, `classtimetable`.WEEKDAY,
       `classtimetable`.TIMEPERIODFROM, `classtimetable`.TIMEPERIODTO
       FROM    db_mscconsule.enrollitem `enrollitem`
       INNER JOIN
       db_mscconsule.classtimetable `classtimetable`
       ON (`enrollitem`.classid = `classtimetable`.CLASSID) ";
       $sql_temp  .= " where enrollitem.classid  ='$classid' and studentid = '$Tstudentid' ";
  
    $result=mysql_db_query($dbname,$sql_temp);
    $NRow=mysql_num_rows($result); 
    while ($row = mysql_fetch_array($result)) { 
    $WEEKDAY = $row["WEEKDAY"]  ;    
    $TIMEPERIODFROM = $row["TIMEPERIODFROM"]  ; 
    $TIMEPERIODTO = $row["TIMEPERIODTO"]  ;     
    }
    $TIMEstart = showtime($TIMEPERIODFROM);
    $TIMEend = showtime($TIMEPERIODTO);
        echo "<TABLE align=center cellSpacing=0 cellPadding=0 width=98% border=0 bgcolor=#686898>";
        echo "<TR><TD> <font color=#FFFFFF><b>??????????? :$dayweekThai[$WEEKDAY] </b></Font> </TD></TR> ";
        echo "<TR><TD> <font color=#FFFFFF><b>??????????? ?????? :$TIMEPERIODFROM : ???? [$TIMEstart] </b></Font> </TD></TR> ";
        echo "<TR><TD> <font color=#FFFFFF><b>?????????? ?????? :$TIMEPERIODTO : ???? [$TIMEend] </b></Font> </TD></TR> ";
    

     
     // ????????????
      @mysql_connect($host,$user,$pwd);
      $sql = "
      SELECT `userinfo`.studentid, `checkinout`.CHECKTIME
      FROM    db_mscconsule.userinfo `userinfo`
      INNER JOIN
      db_mscconsule.checkinout `checkinout`
       ON (`userinfo`.USERID = `checkinout`.USERID)          ";
      $sql  .= " where studentid  ='$studentid' order by CHECKTIME  asc ";
      mysql_query("SET NAMES TIS620");     
      $result=mysql_db_query($dbname,$sql);
      $NRow=mysql_num_rows($result);
     // ????????
        echo "<TABLE align=center cellSpacing=0 cellPadding=0 width=98% border=0 bgcolor=#000000>";
        echo "<TR><TD>";
        echo "<table width='100%' border=0 cellpadding=3 cellspacing=1 align='center'>";
        echo "<tr bgcolor=#686898>";
        echo "<td align=center width=9%><font color=#FFFFFF><b>ÃËÑÊÇÔªÒ</b></font></td>\n";
        echo "<td align=center width=15%><font color=#FFFFFF><b>ª×èÍÇÔªÒ</b></font></td>\n";
        echo "<td align=center width=15%><font color=#FFFFFF><b>??????</b></font></td>\n";
        echo "<td align=center width=15%><font color=#FFFFFF><b>????????</b></font></td>\n";
        echo "<td align=center width=25%><font color=#FFFFFF><b>????????</b> </font></td>\n";
        echo "</tr>\n\n";
             $n = 1;
        while ($row = mysql_fetch_array($result)) {
             $bgc = ($bgc=="#FAF2E6") ? "#FFFFCC" : "#FAF2E6";
             $No = sprintf("%05d",$n);
             $Day = trim(substr($row["CHECKTIME"],0,10)); // ??????????????
             $time = trim(substr($row["CHECKTIME"],11,10)); // ??????????????
                                      
            //$Name = $row["COURSENAME"];
            
            $Reply = $row["Reply"];
            
            // ??????????????????
            
            #$ReplyDate = substr($row["ReplyDate"],0,11); // ????????????
            //$dayofweek = date( 'w',  $row["CHECKTIME"]);
                
            $Mdayofweek = dayofweek($Day);
         if  ($dayweek[$WEEKDAY] == $Mdayofweek   ) {
             $n = $n +1;
             // check ??????
             // check ???????
             
            echo "<tr bgColor=$bgc><td><center><a href='showtable.php'>",$No,"</a></center></td>";
            echo "<td><center>",$Day,"</center></td>";
            echo "<td><center>[$time]<center></td>";  // ???????
            
             echo "<td><center>[$time]<center></td>"; // ????????
             
            $Caclutime =  Datediff($time,$TIMEstart); // ???? ??
              $mCac =  $Caclutime/60;              // ????????????  // ?????      ? 15 ?????????????????? ???????
             if( $mCac  <= 15 )
             {
                 $note = "???????? ".$mCac.'????';
             } elseif (  $mCac >= 30 )
             {
                 $note = "??? ??????????????? 30 ??????????? ".$mCac.'????';
             }
              
            echo "<td><center>$note<center></td></TR>";           
            
         }
        }
        echo "</table>\n";
        echo "</TD></TR>\n";
        echo "</TABLE>\n";

?>