Are there alternative methods to protect forms from abuse instead of using captchas in PHP?

One alternative method to protect forms from abuse in PHP is to use honeypot fields. These hidden fields are included in the form but are not visible to users. Bots will typically fill out all fields, including the hidden ones, while human users will not. By checking if the honeypot field is filled out, you can determine if the submission is likely from a bot and handle it accordingly.

<?php
// Check if the honeypot field is empty
if(!empty($_POST['honeypot_field'])) {
    // Handle the submission as potentially coming from a bot
    // For example, log the attempt or block the submission
} else {
    // Process the form submission as usual
}
?>