php man page for mb_strwidth

MB_STRWIDTH(3)								 1							    MB_STRWIDTH(3)

mb_strwidth - Return width of string

SYNOPSIS
       int mb_strwidth (string	$str, [string  $encoding = mb_internal_encoding()])

DESCRIPTION
	Returns the width of string$str.

	Multi-byte characters are usually twice the width of single byte characters.

       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	|
       |		|	|
       +----------------+-------+
PARAMETERS
	      o $str
		- The string being decoded.

	      o $encoding
		-The $encoding parameter is the character encoding. If it is omitted, the internal character encoding value will be used.

RETURN VALUES
	The width of string$str.

SEE ALSO
       mb_strimwidth(3), mb_internal_encoding(3).

PHP Documentation Group 													    MB_STRWIDTH(3)