I am currently implementing a credit card processing script, most as provided by the merchant gateway. The code calls functions within a class and returns a string based on the response. The end php code I am using (details removed of course) with example information is:
<?php
$gw = new gwapi;
$gw->setLogin("username", "password");
$gw->setBilling("John","Smith","Acme, Inc.","888","Suite 200", "Beverly Hills",
"CA","77777","US","555-555-5555","555-555-5556","
[email protected]",
"www.example.com");
// "CA","90210","US","
[email protected]");
$gw->setOrder("1234","Big Order",1, 2, "PO1234","65.192.14.10");
$r = $gw->doSale("1.00","4111111111111111","1010");
print $gw->responses['responsetext'];
?>
where setlogin allows me to login, setbilling takes the sample consumer information, set order takes the order id and description, dosale takes the amount charged, cc number and exp date.
when all the variables are sent validated then sent off for processing, a string is returned in the following format:
response=1&responsetext=SUCCESS&authcode=123456&transactionid=23456&avsresponse=M&orderid=&type=sale&response_code=100
where:
response = transaction approved or
declined
response text = textual response
authcode = transaction authorization
code
transactionid = payment gateway tran
id
avsresponse = avs response code
orderid = original order id passed in
tran request
response_code = numeric mapping of
processor response
I am trying to solve for the following:
How do I take the data which is
passed back and display it
appropriately on the
page - If the
transaction failed or AVS code
doesnt match my liking or something
is wrong, an error is displayed to
the consumer; if the transaction
processed, they are taken to a
completion
page and the transaction
id is sent in SESSION as output to
the consumer
If the response_code value matches a
table of values, certain actions are
taken, i.e. if code =100, take to
success
page, if code = 300 print
specific error on original
page to
customer, etc.
