Detect transport type from database connection passed in

[alanseiden]

When instantiating the toolkit, users who pass in a database connection that is not ibm_db2 must either specify the transport type in parameter 4 or change toolkit.ini. It's extra work and makes it hard to remember what parameters need to be passed. The toolkit could, instead, automatically detect the transport type when a database connection is passed as parameter 1.
Here is the constructor:

IbmiToolkit/ToolkitApi/ToolkitService.php

Line 25 in e9852fb

return new Toolkit($databaseNameOrResource, $userOrI5NamingFlag, $password, $transportType, $isPersistent);

• ibm_db2 and odbc database connections could be detected with get_resource_type(). The result will be DB2 Connection, DB2 Persistent Connection, odbc link, or odbc link persistent.
• PDO database connections could be detected with $databaseNameOrResource instanceof PDO.

[NattyNarwhal]

notes:

• php 8 changes a lot of resources to be classes instead
• the entire ctor should be less of a god function. logically, using an existing resource vs. creating one would be a good way to split it
• perhaps it could be even (forgive me for this) a factory with named ctors instead