php html dynamicly add to end of list items : i have some data on server side on database like person info.
i like to at the first view, show e.g 3 person info on list like placement.
OK i can do this by write query for read from database and write "for" in php 
and write html code and echo to fill 3 list item.
OK now i need add link like "more persons" below this tree output and when user clicked this link php shows other persons info at the end of previous 3 person info without refresh page or redirecting.
how can do that? thanks and sorry for English grammar mistakes 