I need to get simple webpages (both for admin and users) and integrated with simple php APIs to my website.
It is short work (1-2 days). If you want you can install something like moodle or any other LMS (free one click installation for all such famous products available on my server) and integrate APIs with that and provide all required functionality for admin and user.
For knowing APIs and more information on integration, please visit [url removed, login to view] .
Expected budget is very low ($30-$40), so bid accordingly.