mb_strwidth

(PHP 4 >= 4.0.6, PHP 5)

mb_strwidth — Return width of string

說明

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.

add a note User Contributed Notes
mb_strwidth

larry1chan at gmail dot com
07-Feb-2008 06:38


to convert a multi-byte character into hex strings:



$b = "現，市民派利市的習慣亦有所改變";



    printf("length of string: %d <br>", mb_strlen($b, 'UTF-8'));

    for ($i=0; $i < mb_strlen($b, 'UTF-8'); $i++){

        $ch = mb_substr($b, $i, 1, 'UTF-8');

        $chlen = mb_strwidth($ch, 'UTF-8');

        $hexs = '';

        for ($j=0; $j < $chlen; $j++)

            $hexs = $hexs . sprintf("%x", ord($ch[$j]));

        printf ("width=%d => '%s' |hex=%s<br>", $chlen, $ch, $hexs );

        

        

    }

Anonymous
01-Nov-2007 12:27


Note: mb_strwidth is NOT returning bytes.  It's returning the width of monotype characters.  (In some languages, some characters will take up 2 character widths if displayed in monotype.)

add a note

mb_substitute_character

mb_strtoupper

Last updated: Sun, 25 Nov 2007