What's the logic behind Youtube "Subscribe" feature and how to make same system?

[ilya Kraft]

Hello,

I would like to know how to make similar system to youtube subscriptions. I'm working on a website where members post articles (like videos on youtube) an I want to have a subscribe feature. So if user subscribes to another he gets all the latest articles etc.

Can anyone explain logic behind it? And perhaps suggest any ideas on how to start it )))

Thank You

[dlite922]

This project obviously has a database, so create a table called subscription with user ID's in it.

two columns:
first column is the user ID of the source user
second column is the user ID of those subscribed

UNIQUE(col1,col 2) in that order.

So every time a user clicks subscribe you put the user ID of the author of the article in the first column and user ID of the user that clicked subscribe in the second column.

Sample data (i'll use names instead of IDs):

 
author    | subscriber
-----------------------
john      | kim
john      | darrel
kim       | jim
kim       | john
 
 
 

When a user adds an article, you basically get all the user's that are subscribed and notify them (email, alert, etc)

 
SELECT subscriber 
FROM subscription 
WHERE author = '$authorUserID'; 
 
 

Hope that helped,


Dan

[ilya Kraft]

Alright thank you very much mate ))) I think I can handle it from here just needed to understand it )))