How to create conditional button in HTML based on MySQL data?

[objektif]

I am trying to create a button that will either say "Follow" or "Unfollow", depending on whether or not the current user follows another user. If John followed Tim, but not Sarah, the web view would look as follows, according to John's view:\[code\]_________________________________| | || Tim | (unfollow) | |________________|______________|| | || Sarah | (follow) | |________________|______________|\[/code\]Where ("    ") denotes a button.I have a database that indicates who follows whom, but how would I display the correct button based upon validation with said database?