[Php] Fix form data field names to use spec-defined baseName

[ksvirkou-hubspot]

In the form data preparation block, the key used when building the form data array was changed from {{paramName}} to {{baseName}}.

This fix ensures the form data field names sent in the request match the API's expected field names as defined in the OpenAPI spec, rather than using the PHP-normalized variable names.

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Summary by cubic

Use spec-defined baseName for PHP form-data field names instead of PHP-normalized paramName. This makes multipart/form-data and form-encoded requests use the exact keys from the OpenAPI spec (e.g., dateTime, additionalMetadata).

• Bug Fixes

  • In the PHP generator, form-data keys now use {{baseName}} during preparation.
  • Updated PHP samples and tests to reflect spec keys: dateTime, additionalMetadata, requiredFile, photoUrls.

• Migration

  • Regenerate PHP clients to pick up the fix. If your server handled snake_case keys, ensure it accepts the spec-defined names.

^{Written for commit fec0278. Summary will update on new commits.}

[cubic-dev-ai]

No issues found across 3 files

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[ksvirkou-hubspot]

@jebentier , @dkarlovi , @mandrean , @jfastnacht , @ybelenko , @renepardon

[wing328]

thanks for the PR which has been merged.

did you have a chance to try the php-nextgen client generator? would that meet your requirement?

[ksvirkou-hubspot]

Thanks for merging.
I'll try to check php-nextgen within the next few hours.

[ksvirkou-hubspot]

thanks for the PR which has been merged.

did you have a chance to try the php-nextgen client generator? would that meet your requirement?

#23360