why I getting undefined index in my code

Terza22 · May 25, 2017

undefined index grade in line 108

<?php
if (!isset($_SESSION))
{
session_start();
}

IF(isset($_SESSION['username']))
ECHO "WELL COME ".$_SESSION['username']."<BR>";
else IF(isset($_SESSION['Name']))
if(isset($_POST['button']))
{
   $correct=0;
   $wrong=0;
   $sum=0;
   $grade='';
   $total_q=@$_POST['total'];
   for($i=1;$i<=$total_q;$i++)
   {
   $con = mysql_connect("localhost","root");
mysql_select_db("oes", $con);

$sql = "SELECT * from question_page where question='".@$_POST['q'.$i]."' and Answer='".@$_POST['ans'.$i]."'";// where schedule.status='active'
$result = mysql_query($sql,$con);
$result1 = mysql_fetch_array($result);
if(mysql_num_rows($result))
   $correct++;
$wrong=$_POST['total']-$correct;
   $sum=($correct*10)/$_POST['total'];
   //echo "question of page:".@$_POST['q'.$i]." <br>answer of user ".@$_POST['ans'.$i]."<br>";
   //echo "question of db:".$result1['question']." <br>answer of db ".$result1['Answer']."<br><br>";
   if($sum>=9 && $sum<=10)
   {
   $grade="A+";
   }
   else if($sum>=8.5 && $sum<9)
   {
   $grade="A";
   }
   else if($sum>=8 && $sum<8.5)
   {
   $grade="A-";
   }
   else if($sum>=7.5 && $sum<8)
   {
   $grade="B+";
   }
   else if($sum>=7 && $sum<7.5)
   {
   $grade="B";
   }
   else if($sum>=6.5 && $sum<7)
   {
   $grade="B-";
   }
   else if($sum>=6 && $sum<6.5)
   {
   $grade="C+";
   }
   else if($sum>=5 && $sum<6)
   {
   $grade="C";
   }
   else if($sum>=4.5 && $sum<5)
   {
   $grade="C-";
   }
   else if($sum>=4 && $sum<4.5)
   {
   $grade="D";
   }
   else if($sum>=3.5 && $sum<4)
   {
   $grade="Fx";
   }
   else if($sum>=0 && $sum<3.5)
   {
   $grade="F";
   }
   }
   echo "total number of question ".$_POST['total']."<br>";
   echo "total number of correct answer".$correct."<br>";
   echo "total number of wrong answer".$wrong."<br>";
   echo "total number of Marks:".$sum."<br>";
   echo "your grade is:".$grade."<br>";
}
else
{
header('location:Exam.php');
}
?>

</style>

<div id="right">
<?php
$cnct=mysql_connect("localhost","root","")or die("not connected");
$qry=mysql_select_db("oes") or die("not connected");
$crsnm=mysql_query("select course_name from schedule where schedule_id='".$_GET['Id']."'");
$data=mysql_fetch_array($crsnm);
$a=$_SESSION['ID'];
$b=$_SESSION['Name'];
$c=$_POST['total'];
$g=$_POST['grade'];
$con=mysql_connect("localhost","root","")or die("not connected");
$query=mysql_select_db("oes") or die("note selected");
$res="insert into result values('$a','$b','$correct','$wrong','$sum','$c', '$g' ,'yes','".$data['course_name']."')";
$sql=mysql_query($res) or die(mysql_error());
if(!$sql)
{
echo"not inserted ".mysql_error()."<br>";
}
else
{
echo"inserted"."<br>"."<br>";
}
?>

<?php
$a=$_SESSION['ID'];
$b=$_SESSION['Name'];
$c=$_POST['total'];
$d=$_POST['grade'];
$con=mysql_connect("localhost","root","")or die("not connected");
$query=mysql_select_db("oes") or die("note selected");
$sql=mysql_query("insert into result values('$a','$b','$correct','$wrong','$sum','$c','$d')") or die(mysql_error());
if(!$sql)
{
echo"not inserted ".mysql_error()."<br>";
}
else
{
echo"inserted"."<br>"."<br>";
}
mysql_close($con);
?>

and it calculate the result from exam.php which are below as follows:

<?php
if (!isset($_SESSION))
{
session_start();

}
IF(isset($_SESSION['username']))
ECHO "WELL COME ".$_SESSION['username']."<BR>";
else IF(isset($_SESSION['Name']))
//ECHO "WELL COME ".$_SESSION['Name']."<BR>";
//ECHO "YOUR ID IS ".$_SESSION['ID']."<BR>";
$var=$_SESSION['ID'];
//echo$_SESSION['Name'];
?>

<?php

$sql=mysql_connect("localhost","root","")or die("not connected");
mysql_select_db("oes");
?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<link href="style.css" rel="stylesheet" type="text/css" />
<title></title>
<style type="text/css">

</style>
</head>

<body>
<div id="container">
   <?php
       include "Header.php";
       ?>
   <div id="content">

       <div id="left">
       <rights>


       <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
           <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
   <?php
   /* echo $_SESSION['co1']."<br>";
echo $_SESSION['co2']."<br>";
echo $_SESSION['co3']; */
   $con=mysql_connect("localhost","root","")or die('not selected');
   mysql_select_db("oes",$con)or die('not selected');
   $sql="select * from schedule";
   $query=mysql_query($sql);
   while($row = mysql_fetch_array($query))
   {
   $sub= $coname=$row['course_name'];
//echo $sub."<br>";
   }
$gu=$var;
//echo $gu;
mysql_close($con);
$con=mysql_connect("localhost","root","")or die("not connected");
$query=mysql_select_db("oes",$con)or die("not selected");
$sql= "select Stud_ID from result where Stud_ID='".$gu."' AND status='yes'";
$result = mysql_query($sql);
//$date= $row_Recordsetd['exam_date'];
//if(!mysql_num_rows($result))
   //if((!mysql_num_rows($result)))
{

?>
<html>
<head>
<title></title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
</head>
<body>
<?php
$dateFormat = "d F Y -- g:i a";

$targetDate = time() + (1*60);//Change the 25 to however many minutes you want to countdown

$actualDate = time();

$secondsDiff = $targetDate - $actualDate;

$remainingDay = floor($secondsDiff/60/60/24);

$remainingHour = floor(($secondsDiff-($remainingDay*60*60*24))/60/60);

$remainingMinutes = floor(($secondsDiff-($remainingDay*60*60*24)-($remainingHour*60*60))/60);

$remainingSeconds = floor(($secondsDiff-($remainingDay*60*60*24)-($remainingHour*60*60))-($remainingMinutes*60));

$actualDateDisplay = date($dateFormat,$actualDate);

$targetDateDisplay = date($dateFormat,$targetDate);

?>
<?php
$con1 = mysql_connect("localhost","root");
mysql_select_db("oes", $con1);
$Recordsetd = mysql_query("SELECT exam_time From schedule where schedule_id='".@$_GET['Id']."'") or die(mysql_error());
$row_Recordsetd = mysql_fetch_array($Recordsetd);
//$ex_tih=$row_Recordsetd['exam_time'][strlen($row_Recordsetd['exam_time'])-8].$row_Recordsetd['exam_time'][strlen($row_Recordsetd['exam_time'])-7];
//$ex_tim=$row_Recordsetd['exam_time'][strlen($row_Recordsetd['exam_time'])-5].$row_Recordsetd['exam_time'][strlen($row_Recordsetd['exam_time'])-4];
$ex_tis=$row_Recordsetd['exam_time'][strlen($row_Recordsetd['exam_time'])-2].$row_Recordsetd['exam_time'][strlen($row_Recordsetd['exam_time'])-1];

?>

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">

<head>

<title>Quiz System</title>
<script type="text/javascript">

var days = <?php echo $remainingDay; ?>

var hours = <?php echo $ex_tih; ?>

var minutes = <?php echo $ex_tim; ?>

var seconds = <?php echo $ex_tis; ?>

function setCountDown ()

{

seconds--;
if (seconds < 0){

minutes--;

seconds = 60

}

if (minutes < 0)
{

hours--;

minutes = 59
}

if (hours < 0)
{
days--;
hours = 23
}
document.getElementById("remain").innerHTML = days+" days, "+hours+" hours, "+minutes+" minutes, "+seconds+" seconds";

SD=window.setTimeout( "setCountDown()", 1000 );

if (minutes == '00' && seconds == '00') { //seconds = "00"; window.clearTimeout(SD);
   {
       //document.getElementById('file2').style.visibility = 'hidden';
           window.location = "check.php";
       //document.getElementById('OptionA').disabled = true;
   }
//window.alert("Time is up. Press OK to continue."); // change timeout message as required
//$('input').disabled = true;

}

}

</script>
</head>
<body onload="setCountDown();">
<!--Start Time: <!?php echo $actualDateDisplay; ?><br />

End Time:<!?php echo $targetDateDisplay; ?><br /-->

<h2><b> <div id="remain"><?php echo "$remainingDay days, $remainingHour hours, $remainingMinutes minutes, $remainingSeconds seconds";?></div></b></h2>
           <h1> <!?php echo $_SESSION['Name'];?></h1>
   <p>
<form id="form2" name="form2" method="post" action="point.php?Id=<?php if(isset($_GET['Id']))echo $_GET['Id'];?>">

<?php
$SID=@$_GET['Id'];
// Establish Connection with Database
$con1 = mysql_connect("localhost","root");
// Select Database
mysql_select_db("oes", $con1);

//$query_Recordsetd = ;
$Recordsetd = mysql_query("SELECT course_name From schedule where schedule_id='".@$_GET['Id']."'") or die(mysql_error());
$row_Recordsetd = mysql_fetch_array($Recordsetd);

$con = mysql_connect("localhost","root");

mysql_select_db("oes", $con);

$sql = "SELECT * from question_page where course_name='".$row_Recordsetd[0]."'";// where schedule.status='active'
$result = mysql_query($sql,$con);
$i=1;
while($row = mysql_fetch_array($result))
{
$Id=$row['exam_id'];
$Question=$row['question'];
$OptionA=$row['Option1'];
$OptionB=$row['Option2'];
$OptionC=$row['Option3'];
$OptionD=$row['Option4'];
//echo $Id;
?>
</p>

       <?php

       if($Id=='mult')
       {
       echo'   <td colspan="2"><table width="100%" height="64" border="0" cellpadding="0" cellspacing="0" bordercolor="#A6BF79" say true or fales>

                       <tr>
<td height="32" width="50%">('.$i.')<input type="text" style="width:1000%;background:none;border:hidden;" readonly name="q'.$i.'" value="'.$Question.'"></td>
</tr>

                       <tr>
<td height="32" width="50%"><input type="radio" name="ans'.$i.'" value="A" id="OptionA" />
'.$OptionA.'</td>
<td width="50%"><input type="radio" name="ans'.$i.'" value="B" id="OptionC" />
'.$OptionC.'</td>
</tr>
<tr>
<td height="32" width="50%"><input type="radio" name="ans'.$i.'" value="C" id="OptionB" />
'. $OptionB.'</td>
<td width="50%"><input type="radio" name="ans'.$i.'" value="D" id="OptionD" />
'.$OptionD.'</td>
</tr>
</table></td>';
       }
           if($Id=='T/F')
           {
                   echo '<tr>
<td>('.$i.')</td><td height="36" colspan="2" bgcolor="#85A157"><span class="style1"></span>
                   <tr>say True or False</tr>
                   <input type="text" name="ans'.$i.'" style="margin-left:4px;width:25%;background-color:white;border:none;" value=""></td>
<td><input type="text" style="width:auto;background:none;border:hidden;" readonly name="q'.$i.'" value="'.$Question.'"></td>
               </tr>';

               }
               if($Id=='Filling'){

                   echo '<tr>
<td>('.$i.')</td><td height="36" colspan="2" bgcolor="#85A157"><span class="style1"></span>
                   <tr> Falling the space</tr>
                   <input type="text" name="ans'.$i.'" style="margin-left:4px;width:25%;background-color:white;border:none;" value=""></td>
<td><input type="text" style="width:auto;background:none;border:hidden;" readonly name="q'.$i.'" value="'.$Question.'"></td>
               </tr>';
               }
?>

</p>
<p align="center">
</p>
<div align="center">
<?php
// Retrieve Number of records returned
$records = mysql_num_rows($result);
if($records!=0)
{
?>
<input type="text" hidden name="total" value="<?php echo mysql_num_rows($result);?>">
<input type="submit" name="button" id="button" value="Submit" />

<?php
}
// Close the connection
mysql_close($con);
}
/*elseif(!mysql_num_rows($result))
{
   echo 'not access the exam';
}
elseif(mysql_num_rows($result))
{
   echo 'not aceess the exam';
}
else
{
   echo" not access the exam";
}*/

?>
</div>
</form>
<p> </p>
<h1> </h1>
   </div>

       <div id="footerline"></div>
       <div id="footer">Copyright © 2017 JJU Online Examination System.<br/> All rights reserved. </div>
   </div>

</body>
</html>

justsomeguy · May 25, 2017

Please use code tags when you post code on the forum, and if you're asking about a particular line it helps to identify the line.

An undefined index means that you're trying to access an array index that doesn't exist. Maybe it's a typo, or maybe you're trying to get data from something like $_POST when a form wasn't submitted. You can use isset to check if an array index is set before trying to access it.

dsonesuk · May 25, 2017

I can't see any input with name value of 'grade'?

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why I getting undefined index in my code

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