Add update and display
Config.php
<?php
$databaseHost = 'localhost';
$databaseName = 'test';
$databaseUsername = 'root';
$databasePassword = 'root';
$mysqli = mysqli_connect($databaseHost, $databaseUsername, $databasePassword, $databaseName);
?>
ADD.HTML
<html>
<head>
<title>Add Data</title>
</head>
<body>
<a href="index.php">Home</a>
<br/><br/>
<form action="add.php" method="post" name="form1">
<table width="25%" border="0">
<tr>
<td>Name</td>
<td><input type="text" name="name"></td>
</tr>
<tr>
<td>Age</td>
<td><input type="text" name="age"></td>
</tr>
<tr>
<td>Email</td>
<td><input type="text" name="email"></td>
</tr>
<tr>
<td></td>
<td><input type="submit" name="Submit" value="Add"></td>
</tr>
</table>
</form>
</body>
</html>
Add.php
<html>
<head>
<title>Add Data</title>
</head>
<body>
<?php
//including the database connection file
include_once("config.php");
if(isset($_POST['Submit'])) {
$name = $_POST['name'];
$age = $_POST['age'];
$email = $_POST['email'];
// checking empty fields
if(empty($name) || empty($age) || empty($email)) {
if(empty($name)) {
echo "<font color='red'>Name field is empty.</font><br/>";
}
if(empty($age)) {
echo "<font color='red'>Age field is empty.</font><br/>";
}
if(empty($email)) {
echo "<font color='red'>Email field is empty.</font><br/>";
}
//link to the previous page
echo "<br/><a href='javascript:self.history.back();'>Go Back</a>";
} else {
// if all the fields are filled (not empty)
//insert data to database
$result = mysqli_query($mysqli, "INSERT INTO users(name,age,email) VALUES('$name','$age','$email')");
//display success message
echo "<font color='green'>Data added successfully.";
echo "<br/><a href='index.php'>View Result</a>";
}
}
?>
</body>
</html>
EDIT.php
<?php
// including the database connection file
include_once("config.php");
if(isset($_POST['update']))
{
$id = $_POST['id'];
$name=$_POST['name'];
$age=$_POST['age'];
$email=$_POST['email'];
// checking empty fields
if(empty($name) || empty($age) || empty($email)) {
if(empty($name)) {
echo "<font color='red'>Name field is empty.</font><br/>";
}
if(empty($age)) {
echo "<font color='red'>Age field is empty.</font><br/>";
}
if(empty($email)) {
echo "<font color='red'>Email field is empty.</font><br/>";
}
} else {
//updating the table
$result = mysqli_query($mysqli, "UPDATE users SET name='$name',age='$age',email='$email' WHERE id=$id");
//redirectig to the display page. In our case, it is index.php
header("Location: index.php");
}
}
?>
<?php
//getting id from url
$id = $_GET['id'];
//selecting data associated with this particular id
$result = mysqli_query($mysqli, "SELECT * FROM users WHERE id=$id");
while($res = mysqli_fetch_array($result))
{
$name = $res['name'];
$age = $res['age'];
$email = $res['email'];
}
?>
<html>
<head>
<title>Edit Data</title>
</head>
<body>
<a href="index.php">Home</a>
<br/><br/>
<form name="form1" method="post" action="edit.php">
<table border="0">
<tr>
<td>Name</td>
<td><input type="text" name="name" value="<?php echo $name;?>"></td>
</tr>
<tr>
<td>Age</td>
<td><input type="text" name="age" value="<?php echo $age;?>"></td>
</tr>
<tr>
<td>Email</td>
<td><input type="text" name="email" value="<?php echo $email;?>"></td>
</tr>
<tr>
<td><input type="hidden" name="id" value=<?php echo $_GET['id'];?>></td>
<td><input type="submit" name="update" value="Update"></td>
</tr>
</table>
</form>
</body>
</html>
INDEX.PHP
<?php
//including the database connection file
include_once("config.php");
//fetching data in descending order (lastest entry first)
//$result = mysql_query("SELECT * FROM users ORDER BY id DESC"); // mysql_query is deprecated
$result = mysqli_query($mysqli, "SELECT * FROM users ORDER BY id DESC"); // using mysqli_query instead
?>
<html>
<head>
<title>Homepage</title>
</head>
<body>
<a href="add.html">Add New Data</a><br/><br/>
<table width='80%' border=0>
<tr bgcolor='#CCCCCC'>
<td>Name</td>
<td>Age</td>
<td>Email</td>
<td>Update</td>
</tr>
<?php
//while($res = mysql_fetch_array($result)) { // mysql_fetch_array is deprecated, we need to use mysqli_fetch_array
while($res = mysqli_fetch_array($result)) {
echo "<tr>";
echo "<td>".$res['name']."</td>";
echo "<td>".$res['age']."</td>";
echo "<td>".$res['email']."</td>";
echo "<td><a href=\"edit.php?id=$res[id]\">Edit</a></td></tr>";
}
?>
</table>
</body>
</html>
