<?php
require('db.php');
if (isset($_REQUEST['username'])){
$username = stripslashes($_REQUEST['username']); // removes backslashes
$username = mysqli_real_escape_string($con,$username); //escapes special characters in a string
$email = stripslashes($_REQUEST['email']);
$email = mysqli_real_escape_string($con,$email);
$status = stripslashes($_REQUEST['status']);
$password = stripslashes($_REQUEST['password']);
$trn_date = date("Y-m-d H:i:s");
$query = "INSERT into `users` (username, password, email, status, trn_date) VALUES ('$username','$password', '$email', '$status', '$trn_date')";
$result = mysqli_query($con,$query);
if($result){
echo "<div class='form'><h3>You are registered successfully.</h3><br/>Click here to <a href='login.php'>Login</a></div>";
}
}else{
}}
?>

i to :

if (isset($_POST['submit'])) {
$secret = 'xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx';
$response = $_POST['g-recaptcha-response'];
$remoteip = $_SERVER['REMOTE_ADDR'];

$url = file_get_contents("https://www.google.com/recaptcha/api/siteverify…");
$result = json_decode($url, TRUE);
if ($result['success'] == 1) {
echo 'Nie jesteś botem';
}else{
echo 'Błędnie wypełnione pole reCAPTCHA';
}
}
?>