Connecting
To connect to Authorize.net, you can use either a DSN or an ODBC connection string. Both of these methods use the odbc_connect function.
Connect to a DSN
To connect using a DSN:
$cnx = odbc_connect("CData AuthorizeNet Sys", "", "");
Provide a Driver Connection String
To connect using an ODBC connection string:
$cnx = odbc_connect("DRIVER={CData ODBC Driver for Authorize.net};LoginID=myLoginID;TransactionKey=myTransactionKey", "", "");