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.)
(PHP 4 >= 4.0.6, PHP 5, PHP 7, PHP 8)
mb_strwidth — Return width of string
Returns the width of string string,
where halfwidth characters count as 1, and fullwidth
characters count as 2.
See » https://www.unicode.org/reports/tr11/
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.
stringThe string being decoded.
encodingDer Parameter encoding
legt die Zeichenkodierung fest. Wird er nicht übergeben, so wird die interne
Zeichenkodierung genutzt.
The width of string string.
As of PHP 8.0.0, a ValueError is thrown if
encoding is an invalid encoding.
Prior to PHP 8.0.0, an E_WARNING was emitted instead.
| Version | Beschreibung |
|---|---|
| 8.0.0 |
encoding ist nun nullable (akzeptiert den
null-Wert).
|
| 8.0.0 |
Now throws a ValueError if
encoding is an invalid encoding.
Previously, an E_WARNING was emitted
and false was returned.
|
Beispiel #1 mb_strwidth() example
<?php
var_dump(
mb_strwidth('a'), // LATIN SMALL LETTER A
mb_strwidth("\u{ff41}") // FULLWIDTH LATIN SMALL LETTER A
);
?>Das oben gezeigte Beispiel erzeugt folgende Ausgabe:
int(1) int(2)
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.)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()