Registration Text CAPTCHA Integration

My sign-up page needs a simple, text-based CAPTCHA so I can verify real people before an account is created. The task is to drop a lightweight challenge into the existing registration form, handle server-side validation, and keep the visual style consistent with the site’s current CSS... (Budget: ₹750 - ₹1250 INR, Jobs: Accessibility, CSS, JavaScript, MySQL, PHP, Software Architecture, Web Security)