What is CodeIgniter's Honeypot feature?
Why Interviewers Ask This
This question tests conceptual clarity. Interviewers want to hear a precise, confident definition before moving to more complex CodeIgniter topics. It also reveals how well you can explain technical ideas to non-experts.
Answer
The Honeypot feature in CodeIgniter 4 is a simple spam protection mechanism that adds a hidden form field that regular users cannot see (hidden with CSS) but spam bots often fill in automatically. Configure in app/Config/Honeypot.php: set $hidden = true to enable. Add to forms: <?= \CodeIgniter\Honeypot\Honeypot::insertHoneypot() ?> or use the Honeypot filter. When the hidden field is submitted with a value (i.e., a bot filled it), the request is rejected with a 400 error. Enable as a global filter in app/Config/Filters.php. The Honeypot is not foolproof against all bots but significantly reduces automated spam submissions without adding any UX friction for real users. Combine with CAPTCHA for stronger bot protection.
Common Mistake
Many candidates answer correctly but can't explain the 'why'. Always be prepared to justify your answer with a concrete example or use case from your CodeIgniter experience.
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