Multibyte String Funções
@Silvan
Make sure to use encoding with strlen as well. Use:
<?php
mb_substr($str,$start,mb_strlen($str, $encoding),$encoding);
?>
mb_substr
(PHP 4 >= 4.0.6, PHP 5)
mb_substr — Get part of string
Descrição
string mb_substr
( string $str
, int $start
[, int $length
[, string $encoding
]] )
Performs a multi-byte safe substr() operation based on number of characters. Position is counted from the beginning of str . First character's position is 0. Second character position is 1, and so on.
Parâmetros
Valor Retornado
mb_substr() returns the portion of str specified by the start and length parameters.
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User Contributed Notesmb_substr
zachary dot craig at gmail dot com
10-Nov-2008 01:59
10-Nov-2008 01:59
projektas at gmail dot com
21-Oct-2008 06:29
21-Oct-2008 06:29
First letter in upper case <hr />
<?php
header ('Content-type: text/html; charset=utf-8');
if (isset($_POST['check']) && !empty($_POST['check'])) {
echo htmlspecialchars(ucfirst_utf8($_POST['check']));
} else {
echo htmlspecialchars(ucfirst_utf8('Žąsinų'));
}
function ucfirst_utf8($str) {
if (mb_check_encoding($str,'UTF-8')) {
$first = mb_substr(
mb_strtoupper($str, "utf-8"),0,1,'utf-8'
);
return $first.mb_substr(
mb_strtolower($str,"utf-8"),1,mb_strlen($str),'utf-8'
);
} else {
return $str;
}
}
?>
<form method="post" action="" >
<input type="input" name="check" />
<input type="submit" />
</form>
Silvan
01-Sep-2007 03:30
01-Sep-2007 03:30
Passing null as length will not make mb_substr use it's default, instead it will interpret it as 0.
<?php
mb_substr($str,$start,null,$encoding); //Returns '' (empty string) just like substr()
?>
Instead use:
<?php
mb_substr($str,$start,mb_strlen($str),$encoding);
?>
xiaogil at yahoo dot fr
02-Aug-2005 08:33
02-Aug-2005 08:33
Thanks Darien from /freenode #php for the following example (a little bit changed).
It just prints the 6th character of $string.
You can replace the digits by the same in japanese, chinese or whatever language to make a test, it works perfect.
<?php
mb_internal_encoding("UTF-8");
$string = "0123456789";
$mystring = mb_substr($string,5,1);
echo $mystring;
?>
(I couldn't replace 0123456789 by chinese numbers for example here, because it's automatically converted into latin digits on this website, look :
零一二三四
五六七八九)
gilv
drraf at tlen dot pl
23-Feb-2005 06:44
23-Feb-2005 06:44
Note: If borders are out of string - mb_string() returns empty _string_, when function substr() returns _boolean_ false in this case.
Keep this in mind when using "===" comparisions.
Example code:
<?php
var_dump( substr( 'abc', 5, 2 ) ); // returns "false"
var_dump( mb_substr( 'abc', 5, 2 ) ); // returns ""
?>
It's especially confusing when using mbstring with function overloading turned on.