Re: Deprecate and remove case-insensitive constants?
| From: | Rowan Collins | Date: | Thu, 14 Sep 2017 12:02:53 +0000 |
| Subject: | Re: Deprecate and remove case-insensitive constants? | ||
| References: | 1 2 3 4 5 6 | Groups: | php.internals |
| Request: | Send a blank email to internals+get-100578@lists.php.net to get a copy of this message | ||
On 14 September 2017 10:23:48 BST, Tony Marston
>Would this problem disappear by using UTF8 instead of the Turkish
>character
>set? If so then ten no other solution would be required.
No, the problem has nothing to do with character sets, but with the actual alphabet that humans in
Turkey use, which doesn't follow the same rules as the alphabet that American humans use.
Unicode (the standard, not the character set or any of its encodings) has an algorithm / lookup
table for "case folding", because "convert everything to lower case" is not a
reliable way to produce case insensitive comparisons. Using that correctly world presumably solve
this particular problem.
The bottom line is that case sensitive comparisons are easier than case insensitive ones.
Early programming languages and OSes just ignored the edge cases (or ignored the existence of the
world outside the USA altogether), some later ones decided the whole thing wasn't worth the
effort.
Regards,
--
Rowan Collins
[IMSoP]