Multibyte String
Here is my solution to highlighting search queries in multibyte text:
<?php
function mb_highlight($data, $query, $ins_before, $ins_after)
{
$result = '';
while (($poz = mb_strpos(mb_strtolower($data), mb_strtolower($query))) !== false)
{
$query_len = mb_strlen ($query);
$result .= mb_substr ($data, 0, $poz).
$ins_before.
mb_substr ($data, $poz, $query_len).
$ins_after;
$data = mb_substr ($data, $poz+$query_len);
}
return $result;
}
?>
Enjoy!
[EDIT BY danbrown AT php DOT net: Reclassified to a more appropriate function manual page.]
mb_substr
(PHP 4 >= 4.0.6, PHP 5)
mb_substr — Get part of string
說明
string mb_substr
( string $str
, int $start
[, int $length
[, string $encoding
]] )
mb_substr() returns the portion of str specified by the start and length parameters.
mb_substr() performs multi-byte safe substr() operation based on number of characters. Position is counted from the beginning of str . First character's position is 0. Second character position is 1, and so on.
If encoding is omitted, internal encoding is assumed.
encoding is character encoding. If it is omitted, internal character encoding is used.
See also mb_strcut(), mb_internal_encoding().
add a note
User Contributed Notesmb_substr
dziamid at gmail dot com
06-Feb-2009 04:27
06-Feb-2009 04:27
projektas at gmail dot com
21-Oct-2008 01:29
21-Oct-2008 01:29
First letter in upper case <hr />
<?php
header ('Content-type: text/html; charset=utf-8');
if (isset($_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 $str;
}
}
?>
<form method="post" action="" >
<input type="input" name="check" />
<input type="submit" />
</form>
Silvan
01-Sep-2007 10:30
01-Sep-2007 10:30
Passing null as length will not make mb_substr use it's default, instead it will interpret it as 0.
<?php
mb_substr($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 03:33
02-Aug-2005 03:33
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 02:44
23-Feb-2005 02:44
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.