(PHP 4 >= 4.0.6, PHP 5)
mb_strwidth — Return width of string
Returns the width of string str.
Multi-byte characters are usually twice the width of single byte characters.
| 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 |
The string being decoded.
encoding 参数为字符编码。如果省略，则使用内部字符编码。
The width of string str.