#155 Adapt Smarty upper/lower functions to be codesafe (e.g. for Turkish locale)

[asmecher]

This PR changes the ucfirst/lcfirst/strtoupper/strtolower calls in the code that work with method, class, and variable names. These calls are replaced with equivalents (e.g. using strtr) that do not change depending on the system locale. This resolves a problem in particular with tr_TR, for which strtolower('I') != 'i'.

[lkppo]

Hello,

I need also this fix for a Turkish translation of Wikindx users.

Regards,

[hsarslan]

I am also waiting for this fix. Thanks.

[lkppo]

PHP RFC: Locale-independent case conversion corrects it for PHP 8.2.

[wisskid]

@lkppo cool!

[lkppo]

Isn't it! I have patched my code with this PR for several months and it is working fine. By the way, I factored with functions ucfirst_ascii(), strtolower_ascii() to minimize the modifications.

[lkppo]

Hi @wisskid,

Thanks for merging this PR. My hand patching can go now!

Regards,