How to add Captcha in PHP Registration Form? Hancie e-Learning Studio

How to Add Google Captcha in PHP Registration Form

Use the below given easy steps to add captach in PHP html forms(registration, login, contact etc.):

Create Table In DB by Sql Query
Create Database Connection PHP File
Register your website on Google Re captcha and Get All Details
Create User Registration Form with Captcha Validation In PHP
Create PHP File to Check Captcha and Save User Details

Step 1: Create Table In DB by Sql Query

First of all, open your phpmyadmin and run the following sql query. To create table into your selected database:

CREATE TABLE `users1` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `name` varchar(30) NOT NULL,
  `email` varchar(100) NOT NULL,
  `password` varchar(250) NOT NULL,
  PRIMARY KEY (`id`),
  UNIQUE KEY `email` (`email`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1;

Step 2: Create a Database Connection PHP File

In this step, create a file name db.php and add the following code into db.php file:

<?php
    $servername='localhost';
    $username='root';
    $password='';
    $dbname = "my_db";
    $conn=mysqli_connect($servername,$username,$password,"$dbname");
      if(!$conn){
          die('Could not Connect MySql Server:' .mysql_error());
        }
?>

Step 3: Register your website on Google Re captcha and Get All Details

To add google recaptcha to your website you need to register your website here https://www.google.com/recaptcha/admin. Then get your site key and secret key.about:blank

Step 4: Create User Registration Form with Captcha Validation In PHP

In this step, create user registration form that named registration.php and add google captcha validation.

So, open registration.php and add the following code into it:

<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1,
 shrink-to-fit=no">
<title>Hancie e-Learning Studio</title>
<!-- CSS -->
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/
bootstrap/4.5.2/css/bootstrap.min.css">
<script src="https://www.google.com/recaptcha/api.js" async defer>
</script>
</head>
<body>
<div class="container mt-5">
<div class="card">
<div class="card-header text-center">
Add Google Captcha in PHP Registration Form
</div>
<div class="card-body">
<form action="validate-captcha.php" method="post">
<div class="form-group">
<label for="exampleInputEmail1">Name</label>
<input type="text" name="name" class="form-control" id="name" 
required="">
</div>                                
<div class="form-group">
<label for="exampleInputEmail1">Email address</label>
<input type="email" name="email" class="form-control" id="email"
 aria-describedby="emailHelp" required="">
<small id="emailHelp" class="form-text text-muted">We'll never 
share your email with anyone else.</small>
</div>
<div class="form-group">
<label for="exampleInputEmail1">Password</label>
<input type="password" name="password" class="form-control" 
id="password" required="">
</div>                   
<div class="form-group">
<label for="exampleInputEmail1">Confirm Password</label>
<input type="password" name="cpassword" class="form-control" 
id="cpassword" required="">
</div>   
<div class="g-recaptcha" data-sitekey="Your Site Key"></div>
<input type="submit" name="password-reset-token" class="btn 
btn-primary">
</form>
</div>
</div>
</div>
</body>
</html>

Step 5: Create PHP File to Check Captcha and Save User Details

Now, create validate-captcha.php file and add the following code into your validate-captcha.php file.

<?php
if(isset($_POST['submit']) && $_POST['g-recaptcha-response']!="")
{
include "db.php";
$secret = 'You Site Key';
$verifyResponse = file_get_contents('https://www.google.com/recaptcha
/api/siteverify?secret='.$secret.'&response='.$_POST['g-recaptcha-response']);
$responseData = json_decode($verifyResponse);
if($responseData->success)
{
$name = $_POST['name'];
$email = $_POST['email'];
$pass = $_POST['password'];
mysqli_query($conn, "INSERT INTO users(name, email ,password) 
VALUES('" . $_POST['name'] . "', '" . $_POST['email'] . "', '"
 . md5($_POST['password']) . "')");
echo "User registration form with captcha validation has been
 successfully saved";
}
}

The validate-captcha.php file code will validate your captach and then store user registration data into database table.

Output

Learn Java, Learn HTML, CSS, PHP, Javascript, Python Tutorials || Download program source codes || Java Project and Source code available here || All types error troubleshooting tips available here

How to add Captcha in PHP Registration Form?