How can PHP developers improve form security without relying on custom captchas or Google Recaptcha?

One way PHP developers can improve form security without relying on custom captchas or Google Recaptcha is by implementing honeypot fields. These hidden fields are added to forms and are invisible to users, but bots will fill them out. By checking for these fields upon form submission, developers can easily identify and block automated submissions. 

// Add a honeypot field to the form
echo '<input type="text" name="honeypot" style="display:none;">';

// Check for the honeypot field upon form submission
if(!empty($_POST['honeypot'])){
    // Bot detected, handle accordingly
    exit('Bot detected, form submission blocked.');
} else {
    // Process the form submission
    // Additional form validation and processing code here
}

Keywords

PHP form security CSRF tokens input validation honeypot technique

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