How to make Registration / Signup form in php

How to make Register form in php with email exists, password & confirm password


In this article, you will learn how to make a complete registration or signup form in php using mysql database. 

Where we will be validating the input fields, checking the email that is already existing or not and finally the password and confirm password in php.

For design the registration form we will be using Bootstrap 5.

Step 1: Create a table in database named users for registration or signup.

CREATE TABLE users (
    id INT(11) AUTO_INCREMENT PRIMARY KEY,
    fname VARCHAR(191) NOT NULL,
    lname VARCHAR(191) NOT NULL,
    email VARCHAR(191) NOT NULL,
    password VARCHAR(191) NOT NULL
)


Step 2: Create a html registration form named register.php as follows:

<?php session_start(); ?>
<!DOCTYPE html>
<html lang="en">
<head>
    <title>Register System in PHP MySQL</title>
    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.1.3/dist/css/bootstrap.min.css" rel="stylesheet" />
</head>
<body>
   
    <div class="container mt-5">
        <div class="row justify-content-center">
            <div class="col-md-6">

                <?php
                    // Your message code
                    if(isset($_SESSION['message']))
                    {
                        echo '<h4 class="alert alert-warning">'.$_SESSION['message'].'</h4>';
                        unset($_SESSION['message']);
                    } // Your message code
                ?>

                <div class="card shadow">
                    <div class="card-header text-center">
                        <h4>Register System in PHP MySQL</h4>
                    </div>
                    <div class="card-body">

                        <form action="registercode.php" method="POST">

                            <div class="mb-3">
                                <label>First Name</label>
                                <input type="text" name="fname" required placeholder="Enter First Name" class="form-control">
                            </div>
                            <div class="mb-3">
                                <label>Last Name</label>
                                <input type="text" name="lname" required placeholder="Enter Last Name" class="form-control">
                            </div>
                            <div class="mb-3">
                                <label>Email Id</label>
                                <input type="email" name="email" required placeholder="Enter Email Address" class="form-control">
                            </div>
                            <div class="mb-3">
                                <label>Password</label>
                                <input type="password" name="password" required placeholder="Enter Password" class="form-control">
                            </div>
                            <div class="mb-3">
                                <label>Confirm Password</label>
                                <input type="password" name="confirm_password" required placeholder="Enter Confirm Password" class="form-control">
                            </div>
                            <div class="mb-3">
                                <button type="submit" name="register_btn" class="btn btn-primary">Register Now</button>
                            </div>

                        </form>

                    </div>
                </div>
            </div>
        </div>
    </div>

    <script src="https://code.jquery.com/jquery-3.6.0.min.js"></script>
    <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.1.3/dist/js/bootstrap.bundle.min.js"></script>
</body>
</html>

After creating the html registration form and when you click on submit button for registering the user, it checks for database connection and the Insert query. 

Step 3: Create a database connection in dbconfig.php file:

<?php
    $host = "localhost";
    $username = "your_username";
    $password = "your_password";
    $database = "your_database_name";

    // Create DB Connection
    $conn = mysqli_connect($host, $username, $password, $database);

    // Check connection
    if (!$conn) {
        die("Connection failed: " . mysqli_connect_error());
    }
?>


Step 4: Create a registercode.php file and paste the below code.

<?php
session_start();
include('dbconfig.php');

if(isset($_POST['register_btn']))
{
    $fname = mysqli_real_escape_string($con, $_POST['fname']);
    $lname = mysqli_real_escape_string($con, $_POST['lname']);
    $email = mysqli_real_escape_string($con, $_POST['email']);
    $password = mysqli_real_escape_string($con, $_POST['password']);
    $confirm_password = mysqli_real_escape_string($con, $_POST['confirm_password']);

    if($password == $confirm_password)
    {
        // Check Email
        $checkemail = "SELECT email FROM users WHERE email='$email' LIMIT 1";
        $checkemail_run = mysqli_query($con, $checkemail);

        if(mysqli_num_rows($checkemail_run) > 0)
        {
            // Already Email Exists
            $_SESSION['message'] = "Already Email Exists";
            header("Location: register.php");
            exit(0);
        }
        else
        {
            $user_query = "INSERT INTO users (fname,lname,email,password) VALUES ('$fname','$lname','$email','$password')";
            $user_query_run = mysqli_query($con, $user_query);

            if($user_query_run)
            {
                $_SESSION['message'] = "Registered Successfully";
                header("Location: register.php");
                exit(0);
            }
            else
            {
                $_SESSION['message'] = "Something Went Wrong!";
                header("Location: register.php");
                exit(0);
            }
        }
    }
    else
    {
        $_SESSION['message'] = "Password and Confirm Password does not Match";
        header("Location: register.php");
        exit(0);
    }
}
?>


Thank you.

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