To connect to BigCommerce, 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 BigCommerce Sys", "", "");

Provide a Driver Connection String

To connect using an ODBC connection string:

$cnx = odbc_connect("DRIVER={CData ODBC Driver for BigCommerce};AuthScheme=OAuth;OAuthClientId=YourClientId;OAuthClientSecret=YourClientSecret;StoreId='YoUrSToREId';CallbackURL='http://localhost:33333'", "", "");