Integrating Google re-captcha in PHP existing form

Question

Ok, I've been banging my head against the wall trying to figure this out on my own, but have had no success. I am trying to get recaptcha to validate the captcha on the same page. I would rather have it check that the captcha is right before proceeding to the next page. I placed the call for the google js file in the head:

<script src='https://www.google.com/recaptcha/api.js'></script>

Then following the instructions I place the second piece at the end of the form like so:

<div class="g-recaptcha" data-sitekey="***************************************"></div>

So far so good. Now, the part that is kicking my *** is the server side integration. The code they supply is:

When your users submit the form where you integrated reCAPTCHA, you'll get as part of the payload a string with the name "g-recaptcha-response". In order to check whether Google has verified that user, send a POST request with these parameters: URL: https://www.google.com/recaptcha/api/siteverify secret (required) ********************************************** response (required) The value of 'g-recaptcha-response'. remoteip The end user's ip address.

I am really stumped as to how that part is supposed to work, like where does it go actually? I have checkout.php submitting to billing-checkout.php. Does that second part go into billing-checkout.php? If so, how do I make it work exactly? I hate feeling like a noob but I am very frustrated by this whole thing. Any help would be appreciated, thanks!

Demnogonis · Accepted Answer · 2017-06-26 23:10:38Z

1

You'll have to make a cURL request to the supplied URL and either get a yay or a nay back.

<?php $cp = curl_init("https://www.google.com/recaptcha/api/siteverify"); $fields = array( 'secret' => YOUR_RECAPTCHA_PRIVATE_KEY, 'response' => $_POST['g-recaptcha-response'], 'remoteip' => $_SERVER['REMOTE_ADDR'] ); curl_setopt($cp, CURLOPT_RETURNTRANSFER, 1); curl_setopt($cp, CURLOPT_POST, 1); curl_setopt($cp, CURLOPT_POSTFIELDS, $fields); curl_setopt($cp, CURLOPT_TIMEOUT, 15); $data = curl_exec($cp); // The response curl_close($cp); ?>

edited Jun 26, 2017 at 23:10

answered Jun 26, 2017 at 23:05

Demnogonis

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6 Comments

bbcompent1 Over a year ago

Ok, i will give that a try and get back with you, thanks :)

bbcompent1 Over a year ago

Well I tried that but the captcha went to the next page anyway, even though I did not check the I am not a robot checkbox. Going to try this on the same page just in case it works.

bbcompent1 Over a year ago

Tried this part of the script on both the same and the page it is posting submit to. The captcha is not doing anything.

Demnogonis Over a year ago

Well are you checking the response in your formhandler? The snippet is to be used within your handler code. $data['success'] either returns true or false and you need to raise an error yourself accordingly

bbcompent1 Over a year ago

That was the missing part. I finally figured that out and it is working flawlessly. Thanks for all the assistance, it has been a learning experience for me for sure :)

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