What are some alternative methods to traditional captchas that are more secure against bots in PHP applications?

Traditional captchas can sometimes be bypassed by advanced bots, so it's important to explore alternative methods to enhance security in PHP applications. One effective approach is to implement a honeypot technique, which involves adding a hidden field in the form that only bots would fill out. By checking for this field upon form submission, you can easily identify and block bot submissions. 

// Add a hidden honeypot field in the form
<input type="hidden" name="honeypot" value="" />

// Check for the honeypot field in the form submission
if(!empty($_POST['honeypot'])) {
    // This is likely a bot submission, handle accordingly
    die("Bot detected, submission blocked.");
} else {
    // Process the form submission as usual
}

Keywords

Google reCAPTCHA hCaptcha Invisible CAPTCHA PHP GD Library PHP Imagick

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