native
mb_strtoupper
Syntax
native mb_strtoupper(string[], maxlength = 0);Description
Performs a multi-byte safe (UTF-8) conversion of all chars in string to upper case.
Parameters
| string | The string to convert. |
|---|---|
| maxlength | Optional size of the buffer. If 0, the length of the original string will be used instead. |
Note
Although most code points can be converted in-place, there are notable
exceptions and the final length can vary.
Note
Case mapping is not reversible. That is, toUpper(toLower(x)) != toLower(toUpper(x)).
Return
Number of bytes written.