[SOLVED] Passing data through PayPal to PHP script help

[zc1]

Hi,

 

I need to passing some data through PayPal to a PHP script the data I need to send is the persons userid, I understand I may have to use IPN for this.

 

I need to pass the members UserID through PayPal to a PHP script.

 

I have Googled and found paypaltech which give a guide how to pass data through PayPal using a session, however, I would like it to auto return to the PHP script that will display some texts, so to have it auto return will I need to use IPN ?

 

If I using IPN can I still use the session or should I use item name or item number ?

 

If I use item name or item number does anyone know how to put that into my PHP script ?

 

If I use sessions how long does the session last for and will it always work regardless of browser ?

 

Regards,

Garry