I have a PHP file that gives me output in JSON Format. The code is below -

```
<?php
    include 'configure.php';
    $qr = "SELECT * FROM student_details";
    $res= mysql_query($qr);
    $i=0;
    while($row = mysql_fetch_array($res))
         {
         $stud_arr[$i]["full_name"] = $row["full_name"];
         $stud_arr[$i]["reg_no"] = $row["regno"];
         $stud_arr[$i]["address"] = $row["address"];
         $stud_arr[$i]["mark1"] = $row["mark1"];
         $stud_arr[$i]["mark2"]= $row["mark2"];
         $stud_arr[$i]["mark3"] = $row["mark3"];
    $i++;
     }
    header('Content-type: application/json'); 
    echo json_encode($stud_arr);
    ?>

```

This file when ran on my server, is giving me the result perfectly, i.e. all the student details and their marks as here -

```
[{"full_name":"Lohith","reg_no":"100","address":"street, lane","mark1":"90","mark2":"87","mark3":"88"},{"full_name":"Ranjeet","reg_no":"101","address":"dfkljg","mark1":"56","mark2":"45","mark3":"39"},{"full_name":"karthik","reg_no":"102","address":"askjldf","mark1":"85","mark2":"90","mark3":"100"}]

```

Now I am trying to display this on a HTML file using -

```
function getAllDetails()
{
var myTable = '' ;
myTable += '<table id="myTable" cellspacing=0 cellpadding=2 border=1>' ;
  myTable +=   "<tr><td><b>No</b></td><td><b>Full Name</b></td><td><b>Mark1</b></td><td><b>Mark2</b></td><td><b>Mark3</b></td></tr>";var url = "json-example2.php";
  $.getJSON(url, function(json) { $.each(json, function(v) {    
                myTable +=   "<tr><td>"+v.reg_no+"</td><td>"+v.full_name+"</td><td>"+v.mark1+
                "</td><td>"+v.mark2+
                "</td><td>"+v.mark3+
                "</td></tr>";   });

                $("#stud_tbl").html(myTable);});};

```

The above code is displaying a table but says "undefined" in each data cell of the table.

```
    No  Full Name     Mark1           Mark2           Mark3
undefined   undefined   undefined   undefined   undefined
undefined   undefined   undefined   undefined   undefined
undefined   undefined   undefined   undefined   undefined

```

Please help on how to debug this.