odbc: support for php 8.4 changes #47
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As per https://php.watch/versions/8.1/PgSQL-resource, PostgreSQL extension has moved away from resource objects and is now returning opaque classes (PgSQL\Connection, Result, Lob). These classes no longer provide default conversions to (int), so a different approach is required, while maintaining compatibility to older PHP versions.
My previous commit did not check for the right result structure before raising an exception. While looking into this, I have found a deprecation issue with Postgresql server versions >= 12 that needed fixing as well (adsrc column was removed). Context and recommended replacement: https://www.postgresql.org/docs/12/release-12.html#:~:text=obsolete%20pg_attrdef.-,adsrc,-column%20(Peter%20Eisentraut
This completes the decision tree related to handling pg_() internal functions return types and function availability based on PHP versions. The statement is not normally expected to be executed with any current or historical PHP version, but having it seems like a good idea, at least for completeness.
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This is a PR following the issue reported in #45 regarding using internal opaque classes instead of resources starting with PHP 8.4.