What are some alternative approaches to using Captchas for spam prevention in PHP applications?

The issue with using Captchas for spam prevention in PHP applications is that they can be cumbersome for users and may not always be effective in preventing spam. One alternative approach to using Captchas is to implement honeypot fields in forms. These hidden fields are not visible to users but are checked on form submission to detect spam bots. If the honeypot field is filled out, the submission can be flagged as spam. 

// Add a hidden honeypot field to the form
echo '<input type="hidden" name="honeypot" value="">';

// Check the honeypot field on form submission
if(!empty($_POST['honeypot'])) {
    // Handle spam submission
    die('Spam detected');
} else {
    // Process form submission
}

Keywords

Google reCAPTCHA hCaptcha PHP image manipulation honeypot technique JavaScript validation

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