This PR looks completely nonsensical, you are using a documentation flag for something that doesn't seem to do any comparison to docs.

If what you are after is checking that the arginfos are correctly generated than copy part of https://github.com/php/php-src/blob/master/.github/actions/verify-generated-files/action.yml

This PR looks completely nonsensical, you are using a documentation flag for something that doesn't seem to do any comparison to docs.

The intention of this PR is checking if the contents in ibm_db2.stub.php produces any change in ibm_db2_arginfo.h or ibm_db2_legacy_arginfo.h.
The resulting XML documenaton is not under the SCM in this repo, so there is no check against those files here.

Please, let me know if I am misunderstanding the purpose of ibm_db2_arginfo.h and ibm_db2_legacy_arginfo.h. To me, given the way they are currently generated by gen_stub.php, they seem an artifact that must be in sync with its source (ibm_db2.stub.php).

@Girgias, sorry for the ping.

I've removed the --replace-methodsynopses option from the gen_stub.php execution. Could you please confirm if it makes sense for you?
Thank you in advance.

Looks fine to me now.