[dasil003]

I know it seems insane, but Turkish capitalization is not fun to work with as a programmer. When they latinized the alphabet 100 years ago or so, they were short on vowels and so it must have seemed pretty clever and convenient to make i and I separate letters with İ and ı respective case pairs. From a western programmers perspective though it's one of the worst unicode special cases owing to its combined unexpectedness and commonness.

Just as an example, text-transform: uppercase has been broken in Turkish for all major browsers until I believe Firefox finally fixed it late last year, after having a bug open for nearly a decade.

[zokier]

From my point of view there could be one very simple solution: just add new codepoints in unicode for turkish I and i. So the latin i would follow the common case conventions, and turkish i would use whatever crazy stuff they have there.

Of course that might be bit late to do now, there is probably too much text encoded in the current format.

[mtts]

It's probably a bit late, agreed, but it seems to me this problem is just as much the fault of the encoding itself as it is the fault of PHP : Turkish i and I may look like Western European i and I but they're entirely different characters.

[jeltz]

If they only had used Ï and ï instead everything would have been much simpler.

[obilgic]

Just my curiosity, how do you know that they were short on vowels?