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Editorial Team
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Asked: 2026-06-17T16:57:45+00:00

hi i am working on a php form which has to add a table

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hi i am working on a php form which has to add a table row dynamically when add button is pressed and i am using for loop to save the values the problem is that it is not saving the data into my database and gives the error that the loop values of my textbox is undefined
can anyone help me
here is my script

<?php
session_start();
?>
<!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">
<script language="javascript" type="text/javascript">
var i=1;
function addRow()
{
          var tbl = document.getElementById('table1');
          var lastRow = tbl.rows.length;
          var iteration = lastRow - 1;
          var row = tbl.insertRow(lastRow);

          var firstCell = row.insertCell(0);
          var el = document.createElement('input');
          el.type = 'text';
          el.name = 'name' + i;
          el.id = 'name' + i;
          el.size = 20;
          el.maxlength = 20;
          firstCell.appendChild(el);

          var secondCell = row.insertCell(1);
          var el2 = document.createElement('input');
          el2.type = 'text';
          el2.name = 'address' + i;
          el2.id = 'address' + i;
          el2.size = 20;
          el2.maxlength = 20;
          secondCell.appendChild(el2);

          var thirdCell = row.insertCell(2);
          var el3 = document.createElement('input');
          el3.type = 'text';
          el3.name = 'contactNum' + i;
          el3.id = 'contactNum' + i;
          el3.size = 20;
          el3.maxlength = 20;
          thirdCell.appendChild(el3);
          alert(i);
          i++;
          frm.h.value=i;
          alert(i);

}
</script>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<title>Untitled Document</title></head>

<body>
<form action="submit.php" method="post" name="frm" id="frm">
<table width="40%" border="2" cellpadding="0" cellspacing="0" id="table1">
  <tr>
    <td><strong>Name</strong></td>
    <td><strong>Address</strong> </td>
    <td><strong>Contact Num</strong> </td>
  </tr>
  <tr>
    <td><input name="name" type="text" id="name" size="20" maxlength="20" /></td>
    <td><input name="address" type="text" id="address" size="20" maxlength="20" /></td>
    <td><input name="contactNum" type="text" id="contactNum" size="20" maxlength="12" /></td>
  </tr>

</table>
<input type="button" value="Add" onclick="addRow();" />
<input name="Submit" type="submit" value="Submit" />
<label>
<input name="h" type="hidden" id="h" value="0" />
</label>
</form>
</body>
</html>

hereis my submit.php code

<?php
mysql_connect("localhost", "root", '')or die(mysql_error());
mysql_select_db("test") or die(mysql_error());
$num =  $_POST['h'];
for($i=0;$i<=$num;$i++)
{

        $name       = $_POST["name_$i"];
        $address    = $_POST["address_$i"];
        $contactNum = $_POST["contactNum_$i"];

mysql_query("INSERT INTO `com`(`name`, `add`, contact) Values('$name', '$address', '$contactNum')") or die(mysql_error());
}
echo "<h1>Done!</h1>";

?>
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1 Answer

  1. Editorial Team

    Below code will solve your problem and insert data in database.

    <script language="javascript" type="text/javascript">
var i=1;
function addRow()
{
      var tbl = document.getElementById('table1');
      var lastRow = tbl.rows.length;
      var iteration = lastRow - 1;
      var row = tbl.insertRow(lastRow);

      var firstCell = row.insertCell(0);
      var el = document.createElement('input');
      el.type = 'text';
      el.name = 'name_' + i;
      el.id = 'name_' + i;
      el.size = 20;
      el.maxlength = 20;
      firstCell.appendChild(el);

      var secondCell = row.insertCell(1);
      var el2 = document.createElement('input');
      el2.type = 'text';
      el2.name = 'address_' + i;
      el2.id = 'address_' + i;
      el2.size = 20;
      el2.maxlength = 20;
      secondCell.appendChild(el2);

      var thirdCell = row.insertCell(2);
      var el3 = document.createElement('input');
      el3.type = 'text';
      el3.name = 'contactNum_' + i;
      el3.id = 'contactNum_' + i;
      el3.size = 20;
      el3.maxlength = 20;
      thirdCell.appendChild(el3);
     // alert(i);
      i++;
      frm.h.value=i;
    //  alert(i);
}
</script>

    In make change in according to below :

    <tr>
    <td><input name="name_0" type="text" id="name_0" size="20" maxlength="20" /></td>
    <td><input name="address_0" type="text" id="address_0" size="20" maxlength="20" /></td>
    <td><input name="contactNum_0" type="text" id="contactNum_0" size="20" maxlength="12" /></td>
</tr>

    In submit.php made change like below.

    for($i=0;$i<$num;$i++)
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