PHP 7.1.21 Released

mb_strwidth

(PHP 4 >= 4.0.6, PHP 5, PHP 7)

mb_strwidth返回字符串的宽度

说明

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

返回 string 类型 str 的宽度。

多字节字符通常是单字节字符的两倍宽度。

字符宽度
字符 宽度
U+0000 - U+0019 0
U+0020 - U+1FFF 1
U+2000 - U+FF60 2
U+FF61 - U+FF9F 1
U+FFA0 - 2

参数

str

待解码的 string

encoding

encoding 参数为字符编码。如果省略,则使用内部字符编码。

返回值

string str 的宽度。

参见

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User Contributed Notes 2 notes

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1
Anonymous
10 years ago
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.)
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0
Adam Altman
4 years ago
Important, if you're looking to trim/cut/truncate a string so that it will fit a certain byte size (for example to fit in a database field), look at:  mb_strcut()
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