Uploaded August 2026 | Updated September 2026, 2 weeks ago
Learn how to integrate Google reCAPTCHA v3 into an HTML contact form using PHP and the Google reCAPTCHA Enterprise API. In this step-by-step tutorial, we'll implement the score-based reCAPTCHA v3 method to protect a PHP form from bots, automated submissions, and potentially fraudulent activity.
Unlike traditional CAPTCHA systems, reCAPTCHA v3 works in the background and provides a risk score instead of requiring users to solve a CAPTCHA challenge.
In this tutorial, you'll learn:
✔ How to create a Google reCAPTCHA Enterprise score-based key
✔ How to configure Google Cloud reCAPTCHA Enterprise
✔ How to add the reCAPTCHA Enterprise JavaScript API to an HTML form
✔ How to generate a reCAPTCHA token using grecaptcha.enterprise.execute()
✔ How to send the reCAPTCHA token to a PHP backend
✔ How to verify the token using the Google reCAPTCHA Enterprise API
✔ How to create a reCAPTCHA assessment using PHP and cURL
✔ How to validate the reCAPTCHA token and expected action
✔ How to retrieve and evaluate the reCAPTCHA risk score
✔ How to use a score threshold to accept or reject form submissions
✔ How to keep your API credentials secure
✔ How to troubleshoot common reCAPTCHA Enterprise integration problems
🔐 How the integration works
The implementation follows this flow:
HTML Form → reCAPTCHA Enterprise → Token → PHP → Google Assessment API → Risk Score → Form Processing
The reCAPTCHA token is generated on the client side, but the verification and score-based security decision are performed on the PHP server.
This approach can be adapted for contact forms, registration forms, login forms, newsletter forms, and other PHP-based forms that need protection against automated submissions.
📁 Source Code & Tutorial
Read the complete step-by-step tutorial and get the source code:
👉 Google reCAPTCHA v3 with PHP: HTML Form Integration Using Enterprise API
codexworld.com/integrate-google-recaptcha-v3-in-html-form-with-php
📌 Technologies Used
• PHP
• HTML
• JavaScript
• Google reCAPTCHA v3
• Google reCAPTCHA Enterprise API
• Google Cloud
• REST API
• PHP cURL
If this tutorial helped you, like the video, subscribe to CodexWorld, and turn on notifications for more PHP, JavaScript, API integration, and web development tutorials.
#GoogleRecaptcha #RecaptchaV3 #PHP #RecaptchaEnterprise #WebDevelopment
Learn how to integrate Google reCAPTCHA v3 into an HTML contact form using PHP and the Google reCAPTCHA Enterprise API. In this step-by-step tutorial, we'll implement the score-based reCAPTCHA v3 method to protect a PHP form from bots, automated submissions, and potentially fraudulent activity.
Unlike traditional CAPTCHA systems, reCAPTCHA v3 works in the background and provides a risk score instead of requiring users to solve a CAPTCHA challenge.
In this tutorial, you'll learn:
✔ How to create a Google reCAPTCHA Enterprise score-based key
✔ How to configure Google Cloud reCAPTCHA Enterprise
✔ How to add the reCAPTCHA Enterprise JavaScript API to an HTML form
✔ How to generate a reCAPTCHA token using grecaptcha.enterprise.execute()
✔ How to send the reCAPTCHA token to a PHP backend
✔ How to verify the token using the Google reCAPTCHA Enterprise API
✔ How to create a reCAPTCHA assessment using PHP and cURL
✔ How to validate the reCAPTCHA token and expected action
✔ How to retrieve and evaluate the reCAPTCHA risk score
✔ How to use a score threshold to accept or reject form submissions
✔ How to keep your API credentials secure
✔ How to troubleshoot common reCAPTCHA Enterprise integration problems
🔐 How the integration works
The implementation follows this flow:
HTML Form → reCAPTCHA Enterprise → Token → PHP → Google Assessment API → Risk Score → Form Processing
The reCAPTCHA token is generated on the client side, but the verification and score-based security decision are performed on the PHP server.
This approach can be adapted for contact forms, registration forms, login forms, newsletter forms, and other PHP-based forms that need protection against automated submissions.
📁 Source Code & Tutorial
Read the complete step-by-step tutorial and get the source code:
👉 Google reCAPTCHA v3 with PHP: HTML Form Integration Using Enterprise API
codexworld.com/integrate-google-recaptcha-v3-in-html-form-with-php
📌 Technologies Used
• PHP
• HTML
• JavaScript
• Google reCAPTCHA v3
• Google reCAPTCHA Enterprise API
• Google Cloud
• REST API
• PHP cURL
If this tutorial helped you, like the video, subscribe to CodexWorld, and turn on notifications for more PHP, JavaScript, API integration, and web development tutorials.
#GoogleRecaptcha #RecaptchaV3 #PHP #RecaptchaEnterprise #WebDevelopment
