Allow placeholder validation for write queries

[hemberger]

Remove the restriction that placeholder validation is performed only for SELECT queries. As a result, write queries will now validate their placeholders if write query analysis is enabled.

Previously, placeholder errors in a write query would result in all errors in the query being suppressed (even those unrelated to the placeholders).

Fixes #503.

[staabm]

please check the example in this file (which is the one tested here).

$connection->preparedQuery('INSERT into ada(adaid, gesperrt, email,freigabe1u1) values(:adaid, :gesperrt, :email, :freigabe1u1)', ['adaid' => 1, 'gesperrt' => 0, 'email' => 'test@github.com', 0]); 

I guess this error is not correct, since the last value of the array will be handled by PDO as the last value of the column list.

---

please also add new test-cases (at the very end of the file) which show that the rule works for writable queries as you expect it (and also cover cases which it should not error about)

[hemberger]

I think this query is invalid (because it names a parameter :freigabe1u1 that it does not define), and the new warning is correct. In my testing, I get the following error if I actually try to execute this query:

PDOException: SQLSTATE[HY093]: Invalid parameter number: parameter was not defined

The write queries that are already part of the test suite seem to cover all the cases I can think of. I'm happy to add more if you feel that some category has been omitted. Please let me know!

[staabm]

I see, thx for testing. we can merge after conflicts are resolved then.

[staabm]

thank you

[staabm]

your first feature is avaible within the new release:

https://twitter.com/markusstaab/status/1626234424059908096

thank you!