Storing Form text input in a variable in one file

[jakeatkins via WebmasterKB.com]

Is it possible to have a user enter an amount into a textbox and then store
that in a variable, all within one .php file? I'm trying to set up an online
donation form that needs the amount entered before being sent to the payment
processor form.

Thanks for the help!

 

[Adrienne Boswell]

Gazing into my crystal ball I observed "jakeatkins via WebmasterKB.com"

Is it possible to have a user enter an amount into a textbox and then
store that in a variable, all within one .php file? I'm trying to set
up an online donation form that needs the amount entered before being
sent to the payment processor form.

Thanks for the help!

You're going to need a lot more than the amount. You will need the
person's name, address, card number, expiration, etc. All that
information is in the FORM or QUERYSTRING (depending if the request was
GET or POST) object, a string of name/value pairs. It looks something
like: firstname=John&lastname=Doe&address=123 Any
Street&city=Glendale&state=CA&zip=91205&card=123456789012345&expmonth=9
&expyear=2006.

You will probably want to have the form post to itself, validate the
results serverside, then send them to the gateway in whatever form the
gateway is expecting.

I would suggest first reading up on form processing in PHP, and then
reading the SDK for the gateway you are going to use.