mb_strwidth

Return width of string

&reftitle.description; `int` `mb_strwidth` `string` `string` ``string``null```encoding`&null;

Returns the width of `string` `string`, where halfwidth characters count as `1`, and fullwidth characters count as `2`. See &url.unicode.reports.tr;11/ for details regarding East Asian character widths.

The fullwidth characters are: `U+1100`-`U+115F`, `U+11A3`-`U+11A7`, `U+11FA`-`U+11FF`, `U+2329`-`U+232A`, `U+2E80`-`U+2E99`, `U+2E9B`-`U+2EF3`, `U+2F00`-`U+2FD5`, `U+2FF0`-`U+2FFB`, `U+3000`-`U+303E`, `U+3041`-`U+3096`, `U+3099`-`U+30FF`, `U+3105`-`U+312D`, `U+3131`-`U+318E`, `U+3190`-`U+31BA`, `U+31C0`-`U+31E3`, `U+31F0`-`U+321E`, `U+3220`-`U+3247`, `U+3250`-`U+32FE`, `U+3300`-`U+4DBF`, `U+4E00`-`U+A48C`, `U+A490`-`U+A4C6`, `U+A960`-`U+A97C`, `U+AC00`-`U+D7A3`, `U+D7B0`-`U+D7C6`, `U+D7CB`-`U+D7FB`, `U+F900`-`U+FAFF`, `U+FE10`-`U+FE19`, `U+FE30`-`U+FE52`, `U+FE54`-`U+FE66`, `U+FE68`-`U+FE6B`, `U+FF01`-`U+FF60`, `U+FFE0`-`U+FFE6`, `U+1B000`-`U+1B001`, `U+1F200`-`U+1F202`, `U+1F210`-`U+1F23A`, `U+1F240`-`U+1F248`, `U+1F250`-`U+1F251`, `U+20000`-`U+2FFFD`, `U+30000`-`U+3FFFD`. All other characters are halfwidth characters.

&reftitle.parameters;

`string`

- The `string` being decoded.

`encoding`

- &mbstring.encoding.parameter;
&reftitle.returnvalues;

The width of `string` `string`.

&reftitle.changelog;

&Version; | &Description;
&mbstring.changelog.encoding-nullable;

&reftitle.examples;

### `mb_strwidth` example

    <?php
    var_dump(
        mb_strwidth('a'),       // LATIN SMALL LETTER A
        mb_strwidth("\u{ff41}") // FULLWIDTH LATIN SMALL LETTER A
    );
    ?>

&example.outputs;

    int(1)
    int(2)

&reftitle.seealso;

- `mb_strimwidth`
- `mb_internal_encoding`