PHP CHECK IN Form Integration

I need a fully functional registration form added to an existing PHP website. The form should slot naturally into one of my current pages, collect the usual user details, and hand them off to the server with solid client-side and server-side validation... (Budget: ₹600 - ₹1200 INR, Jobs: cPanel, CSS, Database Management, Frontend Development, HTML, MySQL, PHP, SQL, Web Application, Web Development)