Table of Contents
Getting Started
Please take note that CSS and jQuery used in this tutorial are hosted, so you need an internet connection for them to work.
Creating a Database
The first step is to create our database.
1. Open phpMyAdmin.
2. Click databases, create a database and name it as login_oop.
3. After creating a database, click the SQL and paste the below codes. See image below for detailed instruction.
CREATE TABLE `user` ( `userid` INT(11) NOT NULL AUTO_INCREMENT, `username` VARCHAR(50) NOT NULL, `password` VARCHAR(50) NOT NULL, PRIMARY KEY(`userid`) ) ENGINE=InnoDB DEFAULT CHARSET=latin1;
Creating a Connection
Next, we create our connection to our database. This will serve as the bridge between our forms and database. We name this as conn.php.
<?php
$conn = new mysqli("localhost", "root", "", "login_oop");
if ($conn->connect_error) {
die("Connection failed: " . $conn->connect_error);
}
?>
header.php
This contains our header template.
<!DOCTYPE html>
<html>
<head>
<title>PHP - OOP Login and Sign Up using Ajax/jQuery</title>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.1.0/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/js/bootstrap.min.js"></script>
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css">
</head>
index.php
This contains our login form, signup form and our alert.
<?php
session_start();
if(isset($_SESSION['user'])){
header('location:home.php');
}
?>
<?php include('header.php'); ?>
<body>
<div class="container">
<div style="height:50px;">
</div>
<div class="row" id="loginform">
<div class="col-md-4 col-md-offset-4">
<div class="login-panel panel panel-primary">
<div class="panel-heading">
<h3 class="panel-title"><span class="glyphicon glyphicon-lock"></span> Login
<span class="pull-right"><span class="glyphicon glyphicon-pencil"></span> <a style="text-decoration:none; cursor:pointer; color:white;" id="signup">Sign up</a></span>
</h3>
</div>
<div class="panel-body">
<form role="form" id="logform">
<fieldset>
<div class="form-group">
<input class="form-control" placeholder="Username" name="username" id="username" type="text" autofocus>
</div>
<div class="form-group">
<input class="form-control" placeholder="Password" name="password" id="password" type="password">
</div>
<button type="button" id="loginbutton" class="btn btn-lg btn-primary btn-block"><span class="glyphicon glyphicon-log-in"></span> <span id="logtext">Login</span></button>
</fieldset>
</form>
</div>
</div>
</div>
</div>
<div class="row" id="signupform" style="display:none;">
<div class="col-md-4 col-md-offset-4">
<div class="login-panel panel panel-primary">
<div class="panel-heading">
<h3 class="panel-title"><span class="glyphicon glyphicon-pencil"></span> Sign Up
<span class="pull-right"><span class="glyphicon glyphicon-log-in"></span> <a style="text-decoration:none; cursor:pointer; color:white;" id="login">Login</a></span>
</h3>
</div>
<div class="panel-body">
<form role="form" id="signform">
<fieldset>
<div class="form-group">
<input class="form-control" placeholder="Username" name="susername" id="susername" type="text" autofocus>
</div>
<div class="form-group">
<input class="form-control" placeholder="Password" name="spassword" id="spassword" type="password">
</div>
<button type="button" id="signupbutton" class="btn btn-lg btn-primary btn-block"><span class="glyphicon glyphicon-check"></span> <span id="signtext">Sign Up</span></button>
</fieldset>
</form>
</div>
</div>
</div>
</div>
<div id="myalert" style="display:none;">
<div class="col-md-4 col-md-offset-4">
<div class="alert alert-info">
<center><span id="alerttext"></span></center>
</div>
</div>
</div>
</div>
<script src="custom.js"></script>
</body>
</html>
custom.js
This contains our jQuery and AJAX codes.
$(document).ready(function(){
//bind enter key to click button
$(document).keypress(function(e){
if (e.which == 13){
if($('#loginform').is(":visible")){
$("#loginbutton").click();
}
else if($('#signupform').is(":visible")){
$("#signupbutton").click();
}
}
});
$('#signup').click(function(){
$('#loginform').slideUp();
$('#signupform').slideDown();
$('#myalert').slideUp();
$('#signform')[0].reset();
});
$('#login').click(function(){
$('#loginform').slideDown();
$('#signupform').slideUp();
$('#myalert').slideUp();
$('#logform')[0].reset();
});
$(document).on('click', '#signupbutton', function(){
if($('#susername').val()!='' && $('#spassword').val()!=''){
$('#signtext').text('Signing up...');
$('#myalert').slideUp();
var signform = $('#signform').serialize();
$.ajax({
method: 'POST',
url: 'signup.php',
data: signform,
success:function(data){
setTimeout(function(){
$('#myalert').slideDown();
$('#alerttext').html(data);
$('#signtext').text('Sign up');
$('#signform')[0].reset();
}, 2000);
}
});
}
else{
alert('Please input both fields to Sign Up');
}
});
$(document).on('click', '#loginbutton', function(){
if($('#username').val()!='' && $('#password').val()!=''){
$('#logtext').text('Logging in...');
$('#myalert').slideUp();
var logform = $('#logform').serialize();
setTimeout(function(){
$.ajax({
method: 'POST',
url: 'login.php',
data: logform,
success:function(data){
if(data==''){
$('#myalert').slideDown();
$('#alerttext').text('Login Successful. User Verified!');
$('#logtext').text('Login');
$('#logform')[0].reset();
setTimeout(function(){
location.reload();
}, 2000);
}
else{
$('#myalert').slideDown();
$('#alerttext').html(data);
$('#logtext').text('Login');
$('#logform')[0].reset();
}
}
});
}, 2000);
}
else{
alert('Please input both fields to Login');
}
});
});
signup.php
This contains our signup codes.
<?php
include('conn.php');
if(isset($_POST['susername'])){
$username=$_POST['susername'];
$password=$_POST['spassword'];
$query=$conn->query("select * from user where username='$username'");
if ($query->num_rows>0){
?>
<span>Username already exist.</span>
<?php
}
elseif (!preg_match("/^[a-zA-Z0-9_]*$/",$username)){
?>
<span style="font-size:11px;">Invalid username. Space & Special Characters not allowed.</span>
<?php
}
elseif (!preg_match("/^[a-zA-Z0-9_]*$/",$password)){
?>
<span style="font-size:11px;">Invalid password. Space & Special Characters not allowed.</span>
<?php
}
else{
$mpassword=md5($password);
$conn->query("insert into user (username, password) values ('$username', '$mpassword')");
?>
<span>Sign up Successful.</span>
<?php
}
}
?>
login.php
Our login code.
<?php
include('conn.php');
session_start();
if(isset($_POST['username'])){
$username=$_POST['username'];
$password=md5($_POST['password']);
$query=$conn->query("select * from user where username='$username' and password='$password'");
if ($query->num_rows>0){
$row=$query->fetch_array();
$_SESSION['user']=$row['userid'];
}
else{
?>
<span>Login Failed. User not Found.</span>
<?php
}
}
?>
session.php
This file will be used by our home.html to determine the username of the user that logged in.
<?php
session_start();
include('conn.php');
$query=$conn->query("select * from user where userid='".$_SESSION['user']."'");
$row=$query->fetch_array();
$user=$row['username'];
?>
home.php
Our goto page if login is successful.
<?php include('session.php'); ?>
<?php include('header.php'); ?>
<body>
<div class="container">
<div style="height:50px;">
</div>
<div class="row">
<div class="col-md-4 col-md-offset-4">
<h2>Welcome, <?php echo $user; ?>!</h2>
<a href="logout.php" class="btn btn-danger"><span class="glyphicon glyphicon-log-out"></span> Logout</a>
</div>
</div>
</div>
</body>
</html>
logout.php
Lastly, we need this to destroy our session.
<?php
session_start();
session_destroy();
header('location:index.php');
?>
That ends this tutorial. If you have any comments, suggestions or questions, feel free to write below or message me. Happy Coding!
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