How to setup Google reCAPTCHA
Step 1: Create a Google reCAPTCHA API Key
Go to the reCAPTCHA website:
- Visit the reCAPTCHA website and click on the "Admin Console" button.
Sign in with your Google Account:
- Sign in with your Google Account or create one if you don't have it.
Register a New Site:
- Click on the "+" (plus) icon to create a new site.
Choose reCAPTCHA Type:
- Select the type of reCAPTCHA you want to use. "reCAPTCHA v2" is commonly used for websites. You may choose between the "I'm not a robot Checkbox" or "Invisible reCAPTCHA Badge" options.
Add Domains:
- Add the domain(s) where you'll be using reCAPTCHA. If applicable, you may also need to specify subdomains.
Accept reCAPTCHA Terms of Service:
- Accept the reCAPTCHA Terms of Service and click on the "Submit" button.
Get API Keys:
- Once registered, you'll be provided with a set of keys - a "Site Key" and a "Secret Key." You'll use these keys in your website's code.
Step 2: Integrate reCAPTCHA into Your Website
For reCAPTCHA v2 Checkbox:
Add the following script to your HTML just before the closing </head> tag:
html<head>
<!-- Other head elements -->
<script src="https://www.google.com/recaptcha/api.js" async defer></script>
</head>
Place the reCAPTCHA widget where you want the checkbox to appear in your HTML form:
html<form action="your_form_processing_script.php" method="post">
<!-- Your form fields go here -->
<div class="g-recaptcha" data-sitekey="YOUR_SITE_KEY"></div>
<input type="submit" value="Submit">
</form>
Replace "YOUR_SITE_KEY" with the actual Site Key you obtained.
For Invisible reCAPTCHA:
Add the reCAPTCHA script to your HTML:
html<head>
<!-- Other head elements -->
<script src="https://www.google.com/recaptcha/api.js" async defer></script>
</head>
Add the reCAPTCHA widget to your form:
html<form action="your_form_processing_script.php" method="post">
<!-- Your form fields go here -->
<button class="g-recaptcha"
data-sitekey="YOUR_SITE_KEY"
data-callback="onSubmit"
data-badge="inline">Submit</button>
</form>
Replace "YOUR_SITE_KEY" with the actual Site Key you obtained.
Step 3: Verify reCAPTCHA on the Server
Verify reCAPTCHA on the server-side when processing the form submission. Send a request to Google's reCAPTCHA API to validate the user's response.
Here is a simplified example in PHP:
php<?php
// your_form_processing_script.php
$recaptcha_secret = "YOUR_SECRET_KEY";
$response = $_POST['g-recaptcha-response'];
$verify_url = "https://www.google.com/recaptcha/api/siteverify?secret={$recaptcha_secret}&response={$response}";
$verify = file_get_contents($verify_url);
$result = json_decode($verify);
if ($result->success) {
// Process the form submission
// ...
} else {
// Handle failed reCAPTCHA verification
// ...
}
?>
Replace "YOUR_SECRET_KEY" with your actual Secret Key.
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