mb_convert_case
Performs case folding on a string, converted in the way specified by mode.
Parameters
- string
-
The string being converted.
- mode
-
The mode of the conversion. It can be one of MB_CASE_UPPER, MB_CASE_LOWER, MB_CASE_TITLE, MB_CASE_FOLD, MB_CASE_UPPER_SIMPLE, MB_CASE_LOWER_SIMPLE, MB_CASE_TITLE_SIMPLE, MB_CASE_FOLD_SIMPLE.
- encoding
-
The encoding parameter is the character encoding. If it is omitted or null, the internal character encoding value will be used.
Return Values
A case folded version of string converted in the way specified by mode.
Notes
By contrast to the standard case folding functions such as strtolower and strtoupper, case folding is performed on the basis of the Unicode character properties. Thus the behaviour of this function is not affected by locale settings and it can convert any characters that have 'alphabetic' property, such a-umlaut (รค).
For more information about the Unicode properties, please see http://www.unicode.org/reports/tr21/.
Changelog
| Version | Description |
| 7.3.0 | Added support for MB_CASE_FOLD, MB_CASE_UPPER_SIMPLE, MB_CASE_LOWER_SIMPLE, MB_CASE_TITLE_SIMPLE, and MB_CASE_FOLD_SIMPLE as mode. |