As at least some of you would already be aware, there's a
long-standing issue with using PHP in a Turkish or Azeri locale,
namely that case-insensitive lookups within the Zend engine (method
names, for example) fail on lookups involving upper-case I characters,
since lower-case I in those languages is ı instead of i (note the lack
of a dot).
The long term plan for this, per bug #35050 and any number of
duplicates, was to deal with it in PHP 6. Since PHP 6 isn't going to
happen in its original form, I think we're going to need to revisit
how we want to deal with this. There's a patch linked in the bug from
Tomas Kuliavas and Marcus that fixes the problem by simply redefining
zend_tolower() to a simple locale-insensitive ASCII tolower()
function, which does fix the Turkish and Azeri locales.
As you illustrated in your post, fixing it for locales becomes...
complicated.
If you ask me, there's only one way to fix this, which is how most other
languages fixed it: make the next major version of PHP case-sensitive for
all identifiers. For less bugs, less locale problems and more performance.
It was somewhat-the-plan, even before the Turkish locale issue was brought
up.
Regards,
Stan Vassilev
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