Exploring Asp.net, Silverlight,c#,SQL Server,PHP: Insert, Edit and Delete operations in PHP

In this article we will learn how to insert, edit, update and delete records from the database using PHP. Here we have to create five pages such as config.php (to provide the connection), view.php (to display the records from the database), insert.php (to insert records into the database), edit.php (to edit records), and delete.php (to delete records).

Table Structure

SET SQL_MODE="NO_AUTO_VALUE_ON_ZERO";

--
-- Database: `Sample`
--

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

--
-- Table structure for table `employee`
--

CREATE TABLE `employee` (
`id` int(12) NOT NULL auto_increment,
`name` varchar(255) NOT NULL,
`address` varchar(255) NOT NULL,
`city` varchar(255) NOT NULL,
PRIMARY KEY (`id`)
) ENGINE=MyISAM DEFAULT CHARSET=latin1 AUTO_INCREMENT=7 ;

--
-- Dumping data for table `employee`
--

INSERT INTO `employee` (`id`, `name`, `address`, `city`) VALUES
(1, 'Raj', '10 street dane', 'Pune'),
(2, 'Ravi', '12907A 53 St NW', 'Mumbai'),
(3, 'Rahul', '3rd Floor, 888 Fort Street', 'Noida'),
(4, 'Harry', 'Sir Frederick W Haultain Building 9811 109 ST NW', 'London'),
(5, 'Ian', 'Suite 303, 13220 St. Albert Trail', 'Sydney'),
(6, 'Shaun', '9700 Jasper Avenue', 'Perth');

Code part

Config.php

<?php

/* Database Connection */

$sDbHost = 'localhost';
$sDbName = 'Sample';
$sDbUser = 'root';
$sDbPwd = '';

$dbConn = mysql_connect ($sDbHost, $sDbUser, $sDbPwd) or die ('MySQL connect failed. ' . mysql_error());
mysql_select_db($sDbName,$dbConn) or die('Cannot select database. ' . mysql_error());

?>
View.php

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
<title>View Records</title>
</head>
<body>
<?php

include('config.php');

$result = mysql_query("SELECT * FROM employee")
or die(mysql_error());

echo "<table border='1' cellpadding='10'>";
echo "<tr>
<th><font color='Red'>Id</font></th>
<th><font color='Red'>Name</font></th>
<th><font color='Red'>Address</font></th>
<th><font color='Red'>City</font></th>
<th><font color='Red'>Edit</font></th>
<th><font color='Red'>Delete</font></th>
</tr>";

while($row = mysql_fetch_array( $result ))
{

echo "<tr>";
echo '<td><b><font color="#663300">' . $row['id'] . '</font></b></td>';
echo '<td><b><font color="#663300">' . $row['name'] . '</font></b></td>';
echo '<td><b><font color="#663300">' . $row['address'] . '</font></b></td>';
echo '<td><b><font color="#663300">' . $row['city'] . '</font></b></td>';
echo '<td><b><font color="#663300"><a href="edit.php?id=' . $row['id'] . '">Edit</a></font></b></td>';
echo '<td><b><font color="#663300"><a href="delete.php?id=' . $row['id'] . '">Delete</a></font></b></td>';
echo "</tr>";

}

echo "</table>";
?>
<p><a href="insert.php">Insert new record</a></p>
</body>
</html>
Insert.php

<?php
function valid($name, $address,$city, $error)
{
?>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
<title>Insert Records</title>
</head>
<body>
<?php

if ($error != '')
{
echo '<div style="padding:4px; border:1px solid red; color:red;">'.$error.'</div>';
}
?>

<form action="" method="post">
<table border="1">
<tr>
<td colspan="2"><b><font color='Red'>Insert Records </font></b></td>
</tr>
<tr>
<td width="179"><b><font color='#663300'>Name<em>*</em></font></b></td>
<td><label>
<input type="text" name="name" value="<?php echo $name; ?>" />
</label></td>
</tr>

<tr>
<td width="179"><b><font color='#663300'>Address<em>*</em></font></b></td>
<td><label>
<input type="text" name="address" value="<?php echo $address; ?>" />
</label></td>
</tr>

<tr>
<td width="179"><b><font color='#663300'>City<em>*</em></font></b></td>
<td><label>
<input type="text" name="city" value="<?php echo $city; ?>" />
</label></td>
</tr>

<tr align="Right">
<td colspan="2"><label>
<input type="submit" name="submit" value="Insert Records">
</label></td>
</tr>
</table>
</form>
</body>
</html>
<?php
}

include('config.php');

if (isset($_POST['submit']))
{

$name = mysql_real_escape_string(htmlspecialchars($_POST['name']));
$address = mysql_real_escape_string(htmlspecialchars($_POST['address']));
$city = mysql_real_escape_string(htmlspecialchars($_POST['city']));

if ($name == '' || $address == '' || $city == '')
{

$error = 'Please enter the details!';

valid($name, $address, $city,$error);
}
else
{

mysql_query("INSERT employee SET name='$name', address='$address', city='$city'")
or die(mysql_error());

header("Location: view.php");
}
}
else
{
valid('','','','');
}
?>
Edit.php

<?php
function valid($id, $name, $address,$city, $error)
{
?>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
<title>Edit Records</title>
</head>
<body>
<?php

if ($error != '')
{
echo '<div style="padding:4px; border:1px solid red; color:red;">'.$error.'</div>';
}
?>

<form action="" method="post">
<input type="hidden" name="id" value="<?php echo $id; ?>"/>

<table border="1">
<tr>
<td colspan="2"><b><font color='Red'>Edit Records </font></b></td>
</tr>
<tr>
<td width="179"><b><font color='#663300'>Name<em>*</em></font></b></td>
<td><label>
<input type="text" name="name" value="<?php echo $name; ?>" />
</label></td>
</tr>

<tr>
<td width="179"><b><font color='#663300'>Address<em>*</em></font></b></td>
<td><label>
<input type="text" name="address" value="<?php echo $address; ?>" />
</label></td>
</tr>

<tr>
<td width="179"><b><font color='#663300'>City<em>*</em></font></b></td>
<td><label>
<input type="text" name="city" value="<?php echo $city; ?>" />
</label></td>
</tr>

<tr align="Right">
<td colspan="2"><label>
<input type="submit" name="submit" value="Edit Records">
</label></td>
</tr>
</table>
</form>
</body>
</html>
<?php
}

include('config.php');

if (isset($_POST['submit']))
{

if (is_numeric($_POST['id']))
{

$id = $_POST['id'];
$name = mysql_real_escape_string(htmlspecialchars($_POST['name']));
$address = mysql_real_escape_string(htmlspecialchars($_POST['address']));
$city = mysql_real_escape_string(htmlspecialchars($_POST['city']));

if ($name == '' || $address == '' || $city == '')
{

$error = 'ERROR: Please fill in all required fields!';

valid($id, $name, $address,$city, $error);
}
else
{

mysql_query("UPDATE employee SET name='$name', address='$address' ,city='$city' WHERE id='$id'")
or die(mysql_error());

header("Location: view.php");
}
}
else
{

echo 'Error!';
}
}
else

{

if (isset($_GET['id']) && is_numeric($_GET['id']) && $_GET['id'] > 0)
{

$id = $_GET['id'];
$result = mysql_query("SELECT * FROM employee WHERE id=$id")
or die(mysql_error());
$row = mysql_fetch_array($result);

if($row)
{

$name = $row['name'];
$address = $row['address'];
$city = $row['city'];

valid($id, $name, $address,$city,'');
}
else
{
echo "No results!";
}
}
else

{
echo 'Error!';
}
}
?>
Delete.php

<?php
include('config.php');

if (isset($_GET['id']) && is_numeric($_GET['id']))
{
$id = $_GET['id'];

$result = mysql_query("DELETE FROM employee WHERE id=$id")
or die(mysql_error());

header("Location: view.php");
}
else

{
header("Location: view.php");
}
?>

Output