How we can fill Dropdown list from data base and how we can fill another dropdownlist on change of first droupdown value.

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dear sir we have three table

Add_State
SID	SName	SSName
Add_Distric
DID	SID	DName	DSName
Add_Dep
DepID	SID	DepName	DepSName

I want to fatch data from add_state to a droupdown list1 and want to fill two dropdown on base of SID FROM REMAINING tables onChange of first droupdownlist1.

Posted 14-Oct-14 3:32am

osmo33

Updated 14-Oct-14 13:43pm

Nelek

v2

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Maciej Los · Answer 1 · 2014-10-14T10:15:00

Solution 1

A bit of effort, Google and... Display Records From One ComboBox to Another in PHP[^]

Posted 14-Oct-14 10:15am

Maciej Los

osmo33 · Answer 2 · 2014-10-14T20:44:00

when i am using following

XML

Database: `Work`
Table structure for table `category`
CREATE TABLE `category` (
`id` bigint(11) NOT NULL auto_increment,
`category_name` varchar(255) NOT NULL,
PRIMARY KEY (`id`)
) ENGINE=MyISAM DEFAULT CHARSET=latin1 AUTO_INCREMENT=20 ;

Dumping data for table "category":

INSERT INTO `category` (`id`, `category_name`) VALUES
(9, 'Electronics'),
(2, 'Mobiles'),
(3, 'Camera'),
(10, 'Home & Kitchen'),
(11, 'Apparel'),
(12, 'Gifts'),
(13, 'Appliances'),
(19, 'Medicine');

Table structure for table "company":

CREATE TABLE `company`
(
   `id` bigint(11) NOT NULL auto_increment,
   `cat_id` int(11) NOT NULL,
   `company_name` varchar(255) NOT NULL,
    PRIMARY KEY (`id`)
) ENGINE=MyISAM DEFAULT CHARSET=latin1 AUTO_INCREMENT=34 ;

Dumping data for table "company":

INSERT INTO `company` (`id`, `cat_id`, `company_name`) VALUES
(1, 2, 'Samsung'),
(2, 2, 'Nokia'),
(3, 2, 'LG'),
(6, 11, 'Rebook'),
(7, 11, 'Denim'),
(8, 11, 'Nike'),
(9, 13, 'Philips'),
(10, 13, 'Prestige'),
(11, 3, 'Nikon'),
(12, 3, 'Cannon'),
(13, 3, 'Sony'),
(14, 9, 'Tohsiba'),
(15, 9, 'Panasonic'),
(16, 12, 'Dinner Set'),
(31, 19, 'Generic'),
(18, 10, 'Samsung'),
(19, 10, 'LG'),
(30, 19, 'Branded'),
(32, 19, 'Ayurvedic '),
(29, 19, 'OTC'),
(33, 19, 'homeopethic');

Code Part

config.php
<?php
      $host="localhost";
      $username="root";
      $password="";
      $dbname="Work";
      $con=mysql_connect("$host","$username","$password");
      mysql_select_db("$dbname",$con);
?>

combo.php

<?php
include('config.php');
?>
<!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" />
<title>Untitled Document</title>
<script language="javascript" type="text/javascript">
    function showCompany(catid) {
        document.frm.submit();
    }
</script>
</head>
<body>
<form action="" method="post" name="frm" id="frm">
<table width="500" border="0">
  <tr>
    <td width="119">Category</td>
    <td width="371">
       <select name="cat_id" id="cat_id" onChange="showCompany(this.value);">
       <option value="">--Select--</option>
       <?php
        $sql1="select * from category";
       $sql_row1=mysql_query($sql1);
       while($sql_res1=mysql_fetch_assoc($sql_row1))
       {
       ?>
       <option value="<?php echo $sql_res1["id"]; ?>" <?php if($sql_res1["id"]==$_REQUEST["cat_id"]) { echo "Selected"; } ?>><?php echo $sql_res1["category_name"]; ?></option>
        <?php
        }
        ?>
       </select>
       </td>
  </tr>
  <tr>
    <td>Company</td>
    <td id="td_company">
       <select name="company_id" id="company_id">

       <option value="">--Select--</option>
       <?php
       $sql="select * from company where cat_id='$_REQUEST[cat_id]'";
       $sql_row=mysql_query($sql);
       while($sql_res=mysql_fetch_assoc($sql_row))
       {
       ?>
       <option value="<?php echo $sql_res["id"]; ?>"><?php echo $sql_res["company_name"]; ?></option>
       <?php
       }
       ?>
    </select>
       </td>
  </tr>
  <tr>
    <td>&nbsp;</td>
    <td>&nbsp;</td>
  </tr>
</table>
</form>
</body>
</html>

it show following error help to solve me.........

Category
( ! ) Notice: Undefined index: cat_id in C:\wamp\www\New folder (4)\Doc.php on line 29
Call Stack
# Time Memory Function Location
1 0.0009 143752 {main}( ) ..\Doc.php:0
>Electronics
Company
( ! ) Notice: Undefined index: cat_id in C:\wamp\www\New folder (4)\Doc.php on line 43
Call Stack
# Time Memory Function Location
1 0.0009 143752 {main}( ) ..\Doc.php:0