fix: avoid deprecation messages for PHP 8.4

[phpfui]

Fixes

This PR makes the minimal changes needed to avoid depreciation messages for PHP 8.4. It does not contain any logic changes:

• Removes E_STRING in tests/bootstrap.php
• Add ? to parameter types that default to null
• Make explict $value property in \Twilio\TwiML\GenericNode

All changes should be compatible with PHP 7.1, which is the lowest supported PHP version.

Checklist

• I acknowledge that all my contributions will be made under the project's license
• I have made a material change to the repo (functionality, testing, spelling, grammar)
• I have read the Contribution Guidelines and my PR follows them
• I have titled the PR appropriately
• I have updated my branch with the main branch
• I have added tests that prove my fix is effective or that my feature works
• I have added the necessary documentation about the functionality in the appropriate .md file
• I have added inline documentation to the code I modified

If you have questions, please file a support ticket, or create a GitHub Issue in this repository.

[phpfui]

Is there anything I need to do to get this merged?

Thanks.

[oojacoboo]

Be nice to get this merged in and versioned. Anyone that isn't ignoring deprecations will be blocked from using 8.4

[oojacoboo]

@phpfui can you get the tests passing here? I don't know what's up with the Twilio team - guess still on vacation...

[phpfui]

I have not seen this prefix thing before, but looks like it works now.

Can we get a merge here to support 8.4? PHP 8.4 was released two months ago.

[tiwarishubham635]

Hi! Let me review this once

[tiwarishubham635]

The changes look more or less good to me. Can you please verify once of the places where ? needs to be added? Also, do we really need to give ?string $contentType = null, or can we straightaway write ?string $contentType and use nullable types? Please check once

[oojacoboo]

Also, please add PHP 8.4 to the test-suite. Based on my comment above, I suspect the deprecations are not fully resolved.

[phpfui]

I did not see any other depreciations when running PHPUnit with PHP 8.4, so I think we are good assuming your tests have 100% code coverage.

[tiwarishubham635]

Looks good to me

[tiwarishubham635]

Reverted these changes due to failing tests - https://github.com/twilio/twilio-php/actions/runs/12664947059/job/35293855625