My Google recaptcha verification is not working - php

Question

I am using this code to work recaptcha services. But it tells me you are a bot.
I tried php server side integration but it does not work.
Here is html
<form id="contact-form" name="contact-form" action="submithr.php" method="POST">
<!--Grid row-->
<div class="row">
<div class="col-md-8">
<div class="md-form mb-0">
<label for="subject" class="">Subject</label>
<input type="text" id="subject" name="subject" class="form-control" required>
</div>
</div>
<!--Grid column-->
<div class="col-md-4">
<div class="md-form mb-0">
<label for="category" class="">Select Category</label>
<select type="text" id="category" name="category" class="form-control">
<option value="1">Suggestion</option>
<option value="2">Claim</option>
<option value="3">Help</option>
</select>
</div>
</div>
<!--Grid column-->
</div>
<!--Grid row-->
<!--Grid row-->
<div class="row">
<!--Grid column-->
<div class="col-md-12">
<div class="md-form">
<label for="message">Your message</label>
<textarea type="text" id="message" name="message" rows="2" class="form-control md-textarea" required></textarea>
</div>
</div>
</div>
<!--Grid row-->
<br>
<div class="g-recaptcha" data-sitekey="---My site key---"></div>
<br>
<div class="text-center text-md-left">
<a class="btn btn-primary" onclick="document.getElementById('contact-form').submit();">Send</a>
</div>
</form>
And here is php code
<?php
$subject = $_POST['subject'];
$category = $_POST['category'];
$message = $_POST['message'];
$secretKey = "---My Secret Key---";
$responseKey = $_POST['g-recaptcha-response'];
$userIP = $_SERVER['REMOTE_ADDR'];
$url = "https://www.google.com/recaptcha/api/siteverify?secret=$secretKey&response=$responseKey&remoteip=$userIP";
$response = file_get_contents($url);
$response = json_decode($response);
if ($response->success) {
echo "<script> alert('Thank you For Posting Suggestion')</script>";
}
else{
echo "<script> alert('It looks like you are bot.Try Again')</script>";
}
?>
If check box is checked correctly it should alert me that i checked it correctly But even if i check it correctly it always alert me you are a bot.

Answer 1

Set this file in your html page containinig the form
<script src="https://www.google.com/recaptcha/api.js" async defer></script>
Then set the google div box before your submission button
<div class="g-recaptcha" data-sitekey="Your recaptcha site key here"></div>
here is the php code
<?php
$subject = $_POST['subject'];
$category = $_POST['category'];
$message = $_POST['message'];
// Ensure that recaptchabox is not empty
if(isset($_POST['g-recaptcha-response']) && !empty($_POST['g-recaptcha-response'])){
$secretKey = 'Your_reCAPTCHA_Secret_Key_goes here';
// send request and Verify the reCAPTCHA via g_recaptcha_response post parameter.
$verifyRequest = file_get_contents('https://www.google.com/recaptcha/api/siteverify?secret='.$secretKey.'&response='.$_POST['g-recaptcha-response']);
$result = json_decode($verifyRequest);
// Check if captcha enterd is valid
if($result->success){
// send your form data and update database
echo "<script> alert('Thank you For Posting Suggestion')</script>";
}else{
echo "<script> alert('Faizan You are bot. hahaha....')</script>";
}
}else{
echo "Recaptcha box cannot be empty";
}
?>