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Pspell> <mb_substr_count
[edit] Last updated: Fri, 11 May 2012

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mb_substr

(PHP 4 >= 4.0.6, PHP 5)

mb_substrGet part of string

Description

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.

Parameters

str

The string to extract the substring from.

start

Position of first character to use from str.

length

Maximum number of characters to use from str.

encoding

The encoding parameter is the character encoding. If it is omitted, the internal character encoding value will be used.

Return Values

mb_substr() returns the portion of str specified by the start and length parameters.

See Also



Pspell> <mb_substr_count
[edit] Last updated: Fri, 11 May 2012
 
add a note add a note User Contributed Notes mb_substr
qeremy [atta] gmail [dotta] com 27-Feb-2012 12:58
A proper (logical) alternative for unicode strings;

<?php
function substr_unicode($str, $s, $l = null) {
    return
join("", array_slice(
       
preg_split("//u", $str, -1, PREG_SPLIT_NO_EMPTY), $s, $l));
}

$str = "Büyük";
$s = 0; // start from "0" (nth) char
$l = 3; // get "3" chars
echo substr($str, $s, $l) ."\n";    // Bü
echo mb_substr($str, $s, $l) ."\n"; // Bü
echo substr_unicode($str, $s, $l);  // Büy
?>
p dot assenov at aip-solutions dot com 02-Dec-2011 06:17
I'm trying to capitalize only the first character of the string and tried some of the examples above but they didn't work. It seems mb_substr() cannot calculate the length of the string in multi-byte encoding (UTF-8) and it should be set explicitly. Here is the corrected version:

<?php
function mb_ucfirst($str, $enc = 'utf-8') {
    return
mb_strtoupper(mb_substr($str, 0, 1, $enc), $enc).mb_substr($str, 1, mb_strlen($str, $enc), $enc);
}
?>

cheers!
levani9191 at gmail dot com 18-Jul-2010 12:37
A simple code that check if the latest symbol in the string is a question mark and adds one if it doesn't...

<?php $string = (mb_substr($string, -1, 1, 'UTF-8') != '?') ? $string.'?' : $string; ?>
Anonymous 26-Feb-2010 02:15
If start  is negative, the returned string will start at the start'th character from the end of string
dziamid at gmail dot com 06-Feb-2009 05:27
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.]
projektas at gmail dot com 21-Oct-2008 03:29
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 12:30
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 05:33
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 :
&#38646;&#19968;&#20108;&#19977;&#22235;
&#20116;&#20845;&#19971;&#20843;&#20061;)

gilv
drraf at tlen dot pl 23-Feb-2005 03:44
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.

 
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