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PHP Tutorial : Ajax PHP Login Page with Shake Animation Effect.

Tutorial by:      Date: 2016-04-25 05:32:36

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Users Table
User table contains all the users registration details.

CREATE TABLE `users` (
`uid` INT(11) NOT NULL AUTO_INCREMENT ,
`username` VARCHAR(45) ,
`password` VARCHAR(100) ,
`email` VARCHAR(45) ,
`friend_count` INT(11) ,
`profile_pic` VARCHAR(150),
PRIMARY KEY (`uid`));


Jquery Code
Contains javascipt code, $("#login").click(function(){}- login is the ID name of the login button. Using element.val() calling username and password input values. If id value is even number if(id(even) % 2) = If(0) false

<script src="js/jquery.min.js"></script>
<script src="js/jquery.ui.shake.js"></script>
<script>
$(document).ready(function()
{

$('#login').click(function()
{
var username=$("#username").val();
var password=$("#password").val();
var dataString = 'username='+username+'&password='+password;
if($.trim(username).length>0 && $.trim(password).length>0)
{
$.ajax({
type: "POST",
url: "ajaxLogin.php",
data: dataString,
cache: false,
beforeSend: function(){ $("#login").val('Connecting...');},
success: function(data){
if(data)
{
$("body").load("home.php").hide().fadeIn(1500).delay(6000);
//or
window.location.href = "home.php";
}
else
{
//Shake animation effect.
$('#box').shake();
$("#login").val('Login')
$("#error").html("<span style='color:#cc0000'>Error:</span> Invalid username and password. ");
}
}
});

}
return false;
});

});
</script>


index.php
Contains PHP and HTML code, If session value exists this will  redirect to home page.

<?php
session_start();
if(!empty($_SESSION['login_user']))
{
header('Location: home.php');
}
?>
//HTML Code
<div id="box">
<form action="" method="post">
Username
<input type="text" class="input"  id="username"/>
Password
<input type="password" class="input"  id="password"/>
<input type="submit" class="button button-primary" value="Log In" id="login"/>
<div id="error"></div>
</div>
</form>
</div>


ajaxLogin.php
Contains PHP code, this will verify username and password values in database.

<?php
include("db.php");
session_start();
if(isset($_POST['username']) && isset($_POST['password']))
{
// username and password sent from Form
$username=mysqli_real_escape_string($db,$_POST['username']);
//Here converting passsword into MD5 encryption. 
$password=md5(mysqli_real_escape_string($db,$_POST['password']));

$result=mysqli_query($db,"SELECT uid FROM users WHERE username='$username' and password='$password'");
$count=mysqli_num_rows($result);
$row=mysqli_fetch_array($result,MYSQLI_ASSOC);
// If result matched $username and $password, table row  must be 1 row
if($count==1)
{
$_SESSION['login_user']=$row['uid']; //Storing user session value.
echo $row['uid'];
}

}
?>


home.php
If user session value is empty, this will redirect to login page.

<?php
session_start();
if(empty($_SESSION['login_user']))
{
header('Location: index.php');
}
?>
//HTML Code
Welcome to Home Page
<a href="logout.php">Logout</a>



logout.php
Cleaning the user session value.

<?php
session_start();
if(!empty($_SESSION['login_user']))
{
$_SESSION['login_user']='';
session_destroy();
}
header("Location:index.php");
?>


db.php
Database configuration file, modify username, password and database values.

<?php
define('DB_SERVER', 'localhost');
define('DB_USERNAME', 'username');
define('DB_PASSWORD', 'password');
define('DB_DATABASE', 'database');
$db = mysqli_connect(DB_SERVER,DB_USERNAME,DB_PASSWORD,DB_DATABASE);
?>

 

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