1. string.inc
2. Functions
3. mb_strtoupper
4. File
5. Constants

mb_strtoupper

Syntax

native mb_strtoupper(string[], maxlength = 0);

Usage

The string to convert.

Optional size of the buffer. If 0, the length of the original string
will be used instead.

Description

Performs a multi-byte safe (UTF-8) conversion of all chars in string to upper case.

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.