Rezervy is a great PHP script for online booking solution with multi-step booking form and single page booking form features. It is possible to choose a form design from the supported ones. Rezervy provides the ability to add categories, services, add-ons, employees with a built-in list of popular online payment gateways and sms gateways.
Rezervyhelps you work with category-add-on services, SEO meta tags, strict mode compatibility, coupon discount, recurring discounts...