Multibyte String
PHP Manual

mb_strwidth

(PHP 4 >= 4.0.6, PHP 5)

mb_strwidth — Return width of string

Descripción

int mb_strwidth ( string $str [, string $encoding ] )

mb_strwidth() returns width of string str .

Multi-byte character usually twice of width compare to single byte character.

Characters width
Chars Width
U+0000 - U+0019 0
U+0020 - U+1FFF 1
U+2000 - U+FF60 2
U+FF61 - U+FF9F 1
U+FFA0 - 2

encoding is character encoding. If it is omitted, internal encoding is used.

See also: mb_strimwidth(), mb_internal_encoding().


Multibyte String
PHP Manual