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()
mb_strwidth
(PHP 4 >= 4.0.6, PHP 5, PHP 7, PHP 8)
mb_strwidth — Return width of string
Descrizione
Returns the width of string string,
where halfwidth characters count as 1, and fullwidth
characters count as 2.
See » http://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.
Elenco dei parametri
-
string -
The string being decoded.
-
encoding -
Il parametro
encodingè la codifica dei caratteri. Se è omesso, verrà utilizzata la codifica interna.
Valori restituiti
The width of string string.
Log delle modifiche
| Versione | Descrizione |
|---|---|
| 8.0.0 |
encoding is nullable now.
|
Esempi
Example #1 mb_strwidth() example
<?php
var_dump(
mb_strwidth('a'), // LATIN SMALL LETTER A
mb_strwidth("\u{ff41}") // FULLWIDTH LATIN SMALL LETTER A
);
?>Il precedente esempio visualizzerà:
int(1) int(2)
Vedere anche:
- mb_strimwidth() - Get truncated string with specified width
- mb_internal_encoding() - Set/Get internal character encoding
add a note
User Contributed Notes 2 notes
Adam Altman ¶
10 years ago
