kita coba debug part 2

       include'koneksi/koneksi.php';
              $nik=$_SESSION['nik'];
              $rate='100000'; //fix
$sql="SELECT  * from m_overtime Where STAFF_NIK='$nik' AND OVERTIME_APPSTATUS_HRD='Approved'";
echo "<br/>jalankan sql:$sql";
               $sql1=mysql_query($sql);
            $totaljam=0;
while ($data=mysql_fetch_array($sql1)) {
 $start=date("H:i:s",strtotime($data['OVERTIME_START']));
  $end=date("H:i:s",strtotime($data['OVERTIME_END']));
echo "<br>start: $start | end:$end";
        $strStart = $start;
       $strEnd   = $end ;
    $dteStart = new DateTime($strStart);
       $dteEnd   = new DateTime($strEnd);
    $dteDiff  = $dteStart->diff($dteEnd);

   $showJam=$dteDiff->format("%H:%I"); //salah
echo "<br>show jam:$showJam ";
    $jam= (int) $dteDiff->format("%H");
echo "<br>  jam:$jam ";
    $totaljam+=$jam;
echo "<br>total  jam:$totaljam";
}
    $total=$totaljam * $rate;
  echo "<br>  total: $total ";
    $nama=$data['STAFF_NAME'];
         echo "total jam :".sprintf("%02s:%02s", $totaljam, 0);
echo "<hr/> =============== end";