Untitled

<html>
<head>
    <title>Add Data</title>
</head>

<body>
<?php
//including the database connection file
include_once("config.php");

if(isset($_POST['Submit'])) {
    $name = mysqli_real_escape_string($mysqli, $_POST['name']);
    $age = mysqli_real_escape_string($mysqli, $_POST['age']);
    $email = mysqli_real_escape_string($mysqli, $_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>

<?php
/*
// mysql_connect("database-host", "username", "password")
$conn = mysql_connect("localhost","root","root")
            or die("cannot connected");

// mysql_select_db("database-name", "connection-link-identifier")
@mysql_select_db("test",$conn);
*/

/**
 * mysql_connect is deprecated
 * using mysqli_connect instead
 */

$databaseHost = 'localhost';
$databaseName = 'test';
$databaseUsername = 'root';
$databasePassword = 'root';

$mysqli = mysqli_connect($databaseHost, $databaseUsername, $databasePassword, $databaseName);

?>

<?php
//including the database connection file
include("config.php");

//getting id of the data from url
$id = $_GET['id'];

//deleting the row from table
$result = mysqli_query($mysqli, "DELETE FROM users WHERE id=$id");

//redirecting to the display page (index.php in our case)
header("Location:index.php");
?>

<?php
// including the database connection file
include_once("config.php");

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

    $id = mysqli_real_escape_string($mysqli, $_POST['id']);

    $name = mysqli_real_escape_string($mysqli, $_POST['name']);
    $age = mysqli_real_escape_string($mysqli, $_POST['age']);
    $email = mysqli_real_escape_string($mysqli, $_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>

<?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> | <a href="delete.php?id=$res[id]" onClick="return confirm('Are you sure you want to delete?')">Delete</a></td>";
    }
    ?>
    </table>
</body>
</html>