Paypal - credit card, or login and pay option.

[jimi13]

I have a dynamic price I am going to set with php.

I would like people to have the option to:

Pay with all credit card information directly on the site

- or - 

Login to their paypal and than redirect to the pay option on my site.

I also need to send some php variables after they pay.

Any ideas on how to do this?