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Populate Dropdown and display related record when selected in php

Posted By:satyapriyanayak       Posted Date: January 31, 2014    Points: 200    Category: General    URL: http://www.dotnetspark.com  

In this article we will know how to Populate Dropdown with records from database and display related record when selected.
 

In this article we will know how to Populate Dropdown with records from database and display related record when selected. Here in the dropdown we have one column record, which is populated, and also there is a list named as ALL in the dropdown. When we select ALL link then all records from the database will be displayed. The connection between php scripts and mysql database is done in config.php file.

Table creation

Server: localhost   Database: home_work
-- phpMyAdmin SQL Dump
-- version 2.10.1
-- http://www.phpmyadmin.net
--
-- Host: localhost
-- Generation Time: Nov 17, 2011 at 05:17 PM
-- Server version: 5.0.45
-- PHP Version: 5.2.5

SET SQL_MODE="NO_AUTO_VALUE_ON_ZERO";

--
-- Database: `home_work`
--

-- --------------------------------------------------------

--
-- Table structure for table `dropdown`
--

CREATE TABLE `dropdown` (
  `id` int(10) NOT NULL auto_increment,
  `sid` varchar(255) NOT NULL,
  `sname` varchar(255) NOT NULL,
  `age` int(11) NOT NULL,
  PRIMARY KEY  (`id`)
) ENGINE=MyISAM  DEFAULT CHARSET=latin1 AUTO_INCREMENT=5 ;

--
-- Dumping data for table `dropdown`
--
INSERT INTO `dropdown` (`id`, `sid`, `sname`, `age`) VALUES
(1, 's001', 'raj', 25),
(2, 's002', 'rahul', 26),
(3, 's003', 'raju', 27),
(4, 's004', 'rajesh', 28);


config.php

<?php
$DBHOST = "localhost";
$DBNAME = "home_work";
$DBUSER = "root";

$sLink = mysql_connect($DBHOST,$DBUSER,'') or die('Connection with MySql Server failed');
mysql_select_db($DBNAME, $sLink) or die('MySql DB was not found');
?>

showDetails1.php

<?php
$link = mysql_connect("localhost","root","");
mysql_select_db("home_work",$link);
$sql = "SELECT * FROM dropdown ";
$aResult = mysql_query($sql);
if($_REQUEST['frm_action'] == 3)
{
if ($_REQUEST['cust_id'] == 0)
{
$id = $_REQUEST['cust_id'];
$sqlCustomer = "SELECT * FROM dropdown ";
}
else
{
$id = $_REQUEST['cust_id'];
$sqlCustomer = "SELECT * FROM dropdown WHERE id ='$id'";
}
$aCustomer = mysql_query($sqlCustomer);
}
?>
<html>
<head>
<script type="text/javascript">
function changeSID()
{
oForm       = eval(document.getElementById("frmForm"));
iCustomerId = document.getElementById("sid").value;
url         = "showDetails1.php?frm_action=3&cust_id=" +iCustomerId;
document.location = url;
}
</script>
</head>
<body>
<form name="frmForm" id="frmForm" >
<table border="0" cellspacing="2" cellpadding="2" width="40%">
<tr>
<td align="right" ><strong>Sid</strong></td>
<td align="left"><select name="sid" id="sid" onchange="javascript:changeSID();">
<option value="">Select</option>
<option value="0">All</option>

<?php
$sid1 = $_REQUEST['cust_id'];
while($rows=mysql_fetch_array($aResult,MYSQL_ASSOC))
{
$id  = $rows['id'];
$sid = $rows['sid'];
if($sid1 == $id)
{
$chkselect = 'selected';
}
else
{
$chkselect ='';
}
?>
<option value="<?php echo  $id;?>"<?php echo $chkselect;?>><?php echo $sid;?></option>
<?php } ?>
</td>
</tr>
<?php if($_REQUEST['frm_action'] == 3) { ?>
<tr>
<td colspan="2">
<table  style="border:1px solid #003366;" cellspacing="2" cellpadding="2" width="100%" bgcolor="#003366">
<tr bgcolor="#EFEFEF">
<td><b><font color='Red'>Sid</font></b></td>
<td><b><font color='Red'>Sname</font></b></td>
<td><b><font color='Red'>Age</font></b></td>
</tr>
<?php
while($row1 = @mysql_fetch_array($aCustomer,MYSQL_ASSOC))
{
$sid   = $row1['sid'];
$sname = $row1['sname'];
$age   = $row1['age'];
?>
<tr bgcolor="#FFFFFF">
<td><b><font color='#663300'><?php echo $sid;?></font></b></td>
<td><b><font color='#663300'><?php echo $sname;?></font></b></td>
<td><b><font color='#663300'><?php echo $age;?></font></b></td>
</tr>
<?php } ?>
</table>
</td>
</tr>
<?php } ?>
</table>
</form>
</body>
</html>


Running the application
Run the WampServer then write the below line in the Url
http://localhost/Populate Dropdown box/

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