Fixed E_* warnings generated by arrays and objects assigned to scalars

[dktapps]

The included test case should explain the problem.

I don't know what the correct fix for this is right now.

Side note: Several of the tests don't work so well on PHP 8.2, generating dynamic property deprecation warnings.

[dktapps]

Proposed fix is included in the second commit.

[cweiske]

Before #196 (commit 576f587) , JsonMapper would throw an E_NOTICE

Array to string conversion

Since #196, a ReflectionException was thrown:

Class string does not exist

With #206 that fixes the bug introduced in #196, the old E_NOTICE behavior is back:

Array to string conversion

(Having the failing test as separate commit made this very easy to find out!)

This patch here prevents that E_NOTICE and throws a JsonMapper_Exception instead:

JSON property "pString" in class "JsonMapperTest_Object" is of type object and cannot be converted to string

This is more clear, and better than the E_NOTICE. It should also not break any existing code; at least no code that cared about E_NOTICEs.
Since code-that-does-not-care-about-E_NOTICE is affected, this will be released in a new minor version and not in a patch level version.

[cweiske]

Thank you for the patch!

[cweiske]

Released with 4.3.0