Securing Your Web Forms: A Step-by-Step Guide to Adding Google reCaptcha v3 with PHP
Add Google reCaptcha V3 Example with PHP
What is Google reCAPTCHA v3?
Google reCAPTCHA is a tool designed to prevent spam and abuse on websites. It is a free service that uses advanced risk analysis techniques to differentiate humans from bots. reCAPTCHA v3 works by assigning each website visitor a score based on their interaction with the website. The score ranges from 0.0 to 1.0, with a higher score indicating a higher likelihood that the user is a human.
Google reCAPTCHA v3 Example with PHP
To use Google reCAPTCHA v3 with PHP, follow the steps below:
- Step 1: Register your website with reCAPTCHA
The first step is to register your website with reCAPTCHA. To do this, go to the reCAPTCHA website and click on the “Admin Console” button in the top right corner. Then, follow the prompts to create a new reCAPTCHA site. You will be given a site key and a secret key that you will need to use in your PHP code.
- Step 2: Include the reCAPTCHA API script in your HTML code
Next, you need to include the reCAPTCHA API script in the head section of your HTML code. This script provides the necessary functions to use reCAPTCHA v3. Here’s an example of how to include the script:
Replace “YOUR_SITE_KEY” with the site key that you obtained in Step 1.
- Step 3: Render the reCAPTCHA widget on your web page
To use reCAPTCHA v3, you need to render the reCAPTCHA widget on your web page. This widget generates a unique token for each user that interacts with your website. Here’s an example of how to render the widget:
- Step 4: Verify the token on the server side
Finally, you need to verify the token on the server side using PHP. Here’s an example of how to do this:
Replace “YOUR_SECRET_KEY” with the secret key that you obtained in Step 1. This code retrieves the token from the POST data, sends a request to the reCAPTCHA verification API, and checks the response to see if the user is a human or a bot.
Replace “YOUR_SITE_KEY” with the site key that you obtained in Step 1. The data-callback attribute of the button element specifies the name of the callback function that will be called when the user submits the form. In this example, the callback function is called submitForm. When the user clicks the “Submit” button, the submitForm function is called with the token generated by reCAPTCHA.
In this blog post, we have seen how to implement Google reCAPTCHA v3 with PHP. By following these steps, you can easily add reCAPTCHA to your website and protect it from spam and abuse. Remember that reCAPTCHA v3 works in the background and does not require any user interaction, making it a seamless experience for your website visitors.