Connecting to Authorize.net with PHP
What is authorize.net?
The Authorize.Net Payment Gateway is a secure Internet bridge between merchant businesses and the credit card and electronic check payment processing networks. We provide merchants with fast, reliable and secure passage for transaction data via a 128-bit Secure Sockets Layer (SSL) Internet Protocol (IP) connection, and manage the complex routing of payment information to the appropriate credit card processors. See a diagram that illustrates a typical Authorize.Net credit card transaction.
The Authorize.Net Payment Gateway is available to merchants seven days a week, 24 hours a day. The payment gateway offers many features and options that can be tailored to specific merchant business models.Where do I start?
The first thing that you need to do, is signup with a test account. This will allow you to test out transactions to make sure your scripts are interfacing properly with their API. Here is the URL for getting your account:
API documentation can also be found here:
after signing up, you should receive your new account info within 48 hours.
I have a library available here: (URL). It is originally written by Micah Carrick and is under the GPL/GNU public license. I have made some important additions to the main library, which are needed for it to function properly.
you can get it here: http://www.electronicfiles.net/files/1773/authorize_lib.zip
Requirements: PHP version 4 and above with the CURL extensions enabled
The following 3 files are contained in the above .zip download:
authorizenet.class.php - main class library for connecting to the authorize.net gateway
demo.php - an example driver file that shows how to use the library file. A test transaction is made to the main gateway.
ca-bundle.crt - main certificate file required by CURL for SSL transactions (windows users can place this in c:\windows\system32)
Important Variables that you need to change
curl_setopt ($ch, CURLOPT_CAINFO,"c:\\windows\\system32\\ca-bundle.crt");
change the 3rd parameter "c:\\windows\\system32\\ca-bundle.crt" to the location of your CRT file.
var $gateway_url = "https://test.authorize.net/gateway/transact.dll";
it currently points to the authorize.net gateway for test accounts. If you have an account that is performing real transactions, change this variable to the following value: ""https://secure.authorize.net/gateway/transact.dll"
change x_login to your Login ID (not partner ID)
and x_password to your password
You should have received both of these in an email from authorize.net