update v1

<?php
  $kode = $_POST['kode'];
  $nis  = $_POST['nis'];
  $input=$_POST['input'];
  $statusbulan=$_POST['statusbulan'];
  $bulangasal = array("juli","agustus","september","oktober","nopember","desember");
  $bulangenap = array("januari","februari","maret","april","mei","juni");
  $bulan = $statusbulan=='Gasal'?$bulangasal:$bulangenap;
  $query = mysql_query("SELECT * FROM keu_".$kode." WHERE nis=".$nis)or die(mysql_error());
  if (mysql_num_rows($query)=='1') {
    $data=mysql_fetch_array($query);
    foreach($bulan as $bln){
      if($data[$bln]!=$input[$bln]){
        $qry=mysql_query("UPDATE keu_".kode."
                          SET $bln=".(isset($input[$bln])?$input[$bln]:'NULL')."
                          WHERE nis=".$nis) or die(mysql_error());
        $aktifitas="User operator {$_SESSION['login_name']} "
                  ."menginput spp siswa dengan nis={$nis} bulan={$bln}";
        include "keylog.php";
      }
    }
  } else {
    $sql="INSERT keu_".kode." (id_keu, nis, ".implode(',', $bulan).") VALUES ('','$nis'";
    foreach($bulan as $bln){
      $sql.=",".(isset($input[$bln])?$input[$bln]:'NULL');
    }
    $sql.=") WHERE nis=".$nis;
    $aktifitas="User operator {$_SESSION['login_name']} "
              ."menginput spp siswa dengan nis={$nis} bulan=".implode(',', $bulan);
    include "keylog.php";
    $qry=mysql_query($sql) or die(mysql_error());
    header('location: aW5wdXRfcGVyc2lzd2E-'.$setting->safe_b64encode($qry?'2':'1').'.htm');
  }
?>