Submitting Form Data To Two Locations Using Javascript And Php?

I have an order form that has several text areas and a single PayPal 'Buy Now' submit button. I would like the PayPal button to work like usual, submitting the order to PayPal, but

Solution 1:

Do you want to send a order completion mail ?

If so, write code to send mail in success page of paypal(return page in your server) - This is the actual way of doing it.