Questions about permissions, visible only to yourself

I want to implement login, such as an article only this login visible, how should be implemented, PHP to do, what should be done?

Reply to discussion (solution)

How do you verify that the user is logged in?
In the database for each article, there should be a field UID.
if ($uid = = $current _user_id) {
Show article
}
The previous UID is the UID of the author in the article Database, and the latter is the ID of the user login database.

Whether you are visible to yourself to set a field, this field exists in the database. And then you can use the upstairs judgment.

Before you query, determine whether the user is logged in.

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