fix/static method getCanonicalID should not be called dynamically

[apphp]

Q	A
Is bugfix?	✔️/❌
New feature?	✔️/❌
Breaks BC?	✔️/❌
Tests pass?	✔️/❌
Fixed issues	comma-separated list of tickets # fixed by the PR, if any

[what-the-diff]

PR Summary

• Modification of function calls within CLocale.php
  The manner in which specific functions (getLanguageID, getScriptID, getTerritoryID, and getLocaleDisplayName) within the CLocale.php are calling the getCanonicalID method has been altered. Instead of using $this->, they are now using self::. This change makes the code's method calls more consistent and can potentially improve the overall performance of these functions.

[marcovtwout]

Thanks!

[rob006]

This change breaks BC: previously if you extend this class and override getCanonicalID(), new implementation was used everywhere. After this change new implementation will be ignored and always CLocale::getCanonicalID() will be used.

[marcovtwout]

@rob006 Thank you for checking in detail, but that is not exactly the case. The method itself was not updated and was already static, and there are more function calls within the framework that were already calling it correctly using ::getCanonicalID()

[rob006]

@marcovtwout

Before change: https://3v4l.org/ZAIWn
After change: https://3v4l.org/bM5Ka

I'm not sure if overwriting getCanonicalID() is even supported, but $this-> could be used here to emulate static:: which was not available in older versions of PHP.

[marcovtwout]

The old behavior (to my surprise) doesn't cause any PHP warning. Looking at the history, it doesn't look like $this was used on purpose, so I would say this change is fairly safe.