[#16705] - refactor: remove has() check in doGet().

[noone-silent]

Hello!

• Type: bug fix
• Link to issue: Performance Issue: Redundant has Call in get Method Slowing Down Redis #16705

In raising this pull request, I confirm the following:

• I have read and understood the Contributing Guidelines
• I have checked that another pull request for this purpose does not exist
• I wrote some tests for this PR
• I have updated the relevant CHANGELOG
• I have created a PR for the documentation about this change

Small description of change: Remove the has() check in doGet()

Thanks

[niden]

@noone-silent Can you rebase please. The changelog entry needs to go to 5.9.1

This looks good.

[noone-silent]

@noone-silent Can you rebase please. The changelog entry needs to go to 5.9.1

This looks good.

done

[niden]

Thank you @noone-silent

[Sn0wCrack]

I've created a bug report in relation to this one, but this is causing issues with adapters that do not do existence checks within themselves or return false naturally.

One issue here is the cached value is actually a PHP false then it will always return the default value, which is null. In a loose checked world this is probably fine, but in a strict checked application this may cause problems.

@niden I think this may need to be reverted unless a quick fix can be implemented.