You’ll have noticed captchas on many of the sites you use. When you try to send a contact message, or sign up to a new website, you’re asked to type the text you can see in a distorted picture, to check you really are a human being, not a robot.

captcha letter recognition test

captcha letter recognition test

But to keep up with letter recognition technology, Google has come up with a simplified test, called reCAPTCHA. In this test, you just tick a box and that is enough to prove you’re made of flesh and blood. If you make a mistake the first time, it may offer you another tickbox test to distinguish pictures from each other. It’s a pleasingly simple solution that’s easy to integrate into your contact form.

Re-captcha - it's as easy as ticking a box.

Re-captcha – it’s as easy as ticking a box.

Get started by collecting your reCAPTCHA site and secret keys from Google

Go to https://www.google.com/recaptcha/admin and sign in using your google account. Register the site, and get the two keys – site key and secret key – that you’ll be needing later for the construction of your contact form.

screenshot google reCAPTCHA keys

screenshot google reCAPTCHA keys

Now you’re ready to build your form.

Add the reCAPTCHA snippet inside the head tag of your contact page

head of contact.php

Build your form in html

body of contact.php.

 Make sure you’ve added your reCAPTCHA site key to the contact form, just above the input button

Create your php include which controls the reCAPTCHA and other form validation

includes/contact_verif.php

Make sure you’ve added your reCAPTCHA secret key inside the $secret variable, about line 10

Add your include to the contact page, above the head tag

contact.php

Now you’re ready to receive some contact.

Crop Circle by John Evans

Have they made contact yet? Crop Circle by John Evans