Displaying Posts and comments specifically like Facebook

[friendeyz]

please if I may ask seeing the way comments and posts are being made you will find out that post are being displayed to people in a particular country like someone from Chile cannot see the posts of another person from Russia, or posts can only be shown to friends or mutual friends.
Please how can I use php to do that on my comment system

[Bharat383]

you can add new fields in your table in which you can save the value by user who is adding that.
after that when you are going to display that posts or comments, you can check that value weather it should display or not.