What are some alternative methods to prevent spam bots from submitting forms in PHP?

Spam bots can be prevented from submitting forms in PHP by implementing methods such as CAPTCHA, honeypot fields, and form token validation. These methods help to distinguish between human users and automated bots, reducing the likelihood of spam submissions. 

// Implementing CAPTCHA in PHP form
<form action="submit.php" method="post">
    <input type="text" name="name" placeholder="Name">
    <input type="email" name="email" placeholder="Email">
    <textarea name="message" placeholder="Message"></textarea>
    <div class="g-recaptcha" data-sitekey="YOUR_SITE_KEY"></div>
    <input type="submit" value="Submit">
</form>

Keywords

CAPTCHA reCAPTCHA Honeypot CSRF token Form validation

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