mb_strcut

(PHP 4 >= 4.0.6, PHP 5)

mb_strcut — Coupe une partie de chaîne

Description

string mb_strcut ( string $str , int $start [, int $length [, string $encoding ]] )

mb_strcut() extrait une sous-chaîne depuis une chaîne, d'une façon similaire à la fonction mb_substr(), mais opère sur les octets au lieu des caractères. Si le découpage intervient entre 2 octets d'un caractère multi-octets, le découpage sera effectué au début du premier octet de ce caractère. C'est également la différence avec la fonction substr() qui coupera la chaîne au milieu des octets, résultant ainsi en une séquence d'octets mal-formée.

Liste de paramètres

str: La chaîne à couper.
start: Position de départ dans les octets.
length: Longueur dans les octets.
encoding: Le paramètre encoding est l'encodage des caractères. S'il est omis, l'encodage de caractres interne sera utilisé.

Valeurs de retour

mb_strcut() retourne la portion de la chaîne str qui commence au caractère start et a la longueur de length caractères.

Voir aussi

mb_substr() - Lit une sous-chaîne
mb_internal_encoding() - Lit/modifie l'encodage interne

mb_strimwidth

mb_split

[edit] Last updated: Fri, 17 May 2013

add a note User Contributed Notes mb_strcut - [4 notes]

down

php_engineer_bk at yahoo dot com ¶

2 years ago


function cut_sense($matne_harf, $l_harf ,$return=1 ) {

if ( strlen($matne_harf) > $l_harf){

$end='...';

}else{

$end='';

}

    if ( function_exists('mb_strcut') ){

        $matne_harf = mb_strcut ( $matne_harf, 0 , $l_harf , "UTF-8" );

    }else{

        $matne_harf =substr($matne_harf, 0, $l_harf);

    }

$text=''.$matne_harf.''.$end.'';

  if ( $return == 1){

  return $text;

  }else{

  print $text;

  }

}



Iranian php programmer (farhad zand +989383015266)

down

t dot starling at physics dot unimelb dot edu dot au ¶

8 years ago


What the manual and the first commenter are trying to say is that mb_strcut uses byte offsets, as opposed to mb_substr which uses character offsets. 



Both mb_strcut and mb_substr appear to treat negative and out-of-range offsets and lengths in the basically the same way as substr. An exception is that if start is too large, an empty string will be returned rather than FALSE. Testing indicates that mb_strcut first works out start and end byte offsets, then moves each offset left to the nearest character boundary.

down

oyag02 at yahoo dot co dot jp ¶

9 years ago


diffrence between mb_substr and mb_substr



example:

mb_strcut('I_ROHA', 1, 2) returns 'I_'. Treated as byte stream.

mb_substr('I_ROHA', 1, 2) returns 'ROHA' Treated as character stream.



# 'I_' 'RO' 'HA' means multi-byte character

down

-1

egoalesum at IHATEBOTS dot youarchive dot it ¶

4 years ago


I found this function to be extremely useful.



Here is a practical example, showing the difference between substr(), mb_substr() and mb_strcut():



<?php

mb_internal_encoding('UTF-8');

$string = 'cioèòà';

var_dump(

substr($string, 0, 6),

mb_substr($string, 0, 6),

mb_strcut($string, 0, 6)

);

?>



Output:

string(6) "cioè?"

string(9) "cioèòà"

string(5) "cioè"



Explanation:

$string is long 9 bytes

c - 1 byte

i - 1 byte

o - 1 byte

è - 2 bytes

ò - 2 bytes

à - 2 bytes



substr() works with bytes, so it returns a string which is exactly 6 bytes long. Thus, it truncates the ò character.

mb_substr(), instead, works with characters, so it returns a string which is exactly 6 characters long (but in this case is 9 bytes long).

mb_strcut() works exactly as substr(), but, if the last byte appears to be truncated, it simply omits the character.



When you use

$string = mb_strcut($string, 6);

you can know for sure that strlen($string) <= 6. But no unicode characters will be truncated.



I hope my comment could finally be a simple explanation.

add a note