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    mb_split

    (PHP 4 >= 4.2.0, PHP 5, PHP 7, PHP 8)

    mb_split — Split multibyte string using regular expression

    Descrizione

    mb_split(string $pattern, string $string, int $limit = -1): array|false

    Split a multibyte string using regular expression pattern and returns the result as an array.

    Elenco dei parametri

    pattern

    The regular expression pattern.

    string

    The string being split.

    limit
    If optional parameter limit is specified, it will be split in limit elements as maximum.

    Valori restituiti

    The result as an array, o false in caso di fallimento.

    Note

    Nota:

    The character encoding specified by mb_regex_encoding() will be used as the character encoding for this function by default.

    Vedere anche:

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    User Contributed Notes 8 notes

    up
    62
    Stas Trefilov, Vertilia
    9 years ago
    a (simpler) way to extract all characters from a UTF-8 string to array with a single call to a built-in function:

    <?php
      $str     = 'Ма-
    руся'    ;
          print_r(preg_split('//u', $str, null, PREG_SPLIT_NO_EMPTY));
    ?>

    Output:

    Array
    (
        [0] => М
        [1] => а
        [2] => -
        [3] =>

        [4] => р
        [5] => у
        [6] => с
        [7] => я
    )
    up
    51
    boukeversteegh at gmail dot com
    13 years ago
    The $pattern argument doesn't use /pattern/ delimiters, unlike other regex functions such as preg_match.

    <?php
           # Works. No slashes around the /pattern/
           print_r( mb_split("\s", "hello world") );
       Array (
          [    0] => hello
              [1] => world
           )

           # Doesn't work:
           print_r( mb_split("/\s/", "hello world") );
       Array (
          [    0] => hello world
           )
    ?>
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    48
    adjwilli at yahoo dot com
    16 years ago
    I figure most people will want a simple way to break-up a multibyte string into its individual characters. Here's a function I'm using to do that. Change UTF-8 to your chosen encoding method.

    <?php
    function mbStringToArray ($string) {
            $strlen = mb_strlen($string);
        while (    $strlen) {
                $array[] = mb_substr($string,0,1,"UTF-8");
                $string = mb_substr($string,1,$strlen,"UTF-8");
                $strlen = mb_strlen($string);
        }
        return     $array;
    }
    ?>
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    22
    boukeversteegh at gmail dot com
    14 years ago
    In addition to Sezer Yalcin's tip.

    This function splits a multibyte string into an array of characters. Comparable to str_split().

    <?php
    function mb_str_split( $string ) {
            # Split at all position not after the start: ^
        # and not before the end: $
            return preg_split('/(?<!^)(?!$)/u', $string );
    }

    $string   = '火车票';
    $charlist = mb_str_split( $string );

    print_r( $charlist );
    ?>

    # Prints:
    Array
    (
        [0] => 火
        [1] => 车
        [2] => 票
    )
    up
    3
    thflori at gmail
    7 years ago
    I agree that some people might want a mb_explode('', $string);

    this is my solution for it:

    <?php

    $string     = 'Hallöle';

    $array = array_map(function ($i) use ($string) {
        return     mb_substr($string, $i, 1);
    },     range(0, mb_strlen($string) -1));

    expect($array)->toEqual(['H', 'a', 'l', 'l', 'ö', 'l', 'e']);

    ?>
    up
    7
    gunkan at terra dot es
    12 years ago
    To split an string like this: "日、に、本、ほん、語、ご" using the "、" delimiter i used:

         $v = mb_split('、',"日、に、本、ほん、語、ご");

    but didn't work.

    The solution was to set this before:

           mb_regex_encoding('UTF-8');
          mb_internal_encoding("UTF-8");
         $v = mb_split('、',"日、に、本、ほん、語、ご");

    and now it's working:

    Array
    (
        [0] => 日
        [1] => に
        [2] => 本
        [3] => ほん
        [4] => 語
        [5] => ご
    )
    up
    0
    qdb at kukmara dot ru
    14 years ago
    an other way to str_split multibyte string:
    <?php
    $s    ='әӘөүҗңһ';

    //$temp_s=iconv('UTF-8','UTF-16',$s);
    $temp_s=mb_convert_encoding($s,'UTF-16','UTF-8');
    $temp_a=str_split($temp_s,4);
    $temp_a_len=count($temp_a);
    for(    $i=0;$i<$temp_a_len;$i++){
            //$temp_a[$i]=iconv('UTF-16','UTF-8',$temp_a[$i]);
            $temp_a[$i]=mb_convert_encoding($temp_a[$i],'UTF-8','UTF-16');
    }

    echo(    '<pre>');
    print_r($temp_a);
    echo(    '</pre>');

    //also possible to directly use UTF-16:
    define('SLS',mb_convert_encoding('/','UTF-16'));
    $temp_s=mb_convert_encoding($s,'UTF-16','UTF-8');
    $temp_a=str_split($temp_s,4);
    $temp_s=implode(SLS,$temp_a);
    $temp_s=mb_convert_encoding($temp_s,'UTF-8','UTF-16');
    echo(    $temp_s);
    ?>
    up
    -3
    gert dot matern at web dot de
    15 years ago
    We are talking about Multi Byte ( e.g. UTF-8) strings here, so preg_split will fail for the following string:

    'Weiße Rosen sind nicht grün!'

    And because I didn't find a regex to simulate a str_split I optimized the first solution from adjwilli a bit:

    <?php
    $string     = 'Weiße Rosen sind nicht grün!'
    $stop   = mb_strlen( $string);
    $result = array();

    for(     $idx = 0; $idx < $stop; $idx++)
    {
           $result[] = mb_substr( $string, $idx, 1);
    }
    ?>

    Here is an example with adjwilli's function:

    <?php
    mb_internal_encoding    ( 'UTF-8');
    mb_regex_encoding( 'UTF-8'); 

    function     mbStringToArray
    ( $string
    )
    {
          $stop   = mb_strlen( $string);
          $result = array();

      for(     $idx = 0; $idx < $stop; $idx++)
      {
             $result[] = mb_substr( $string, $idx, 1);
      }

      return     $result;
    }

    echo     '<pre>', PHP_EOL,
    print_r( mbStringToArray( 'Weiße Rosen sind nicht grün!', true)), PHP_EOL,
    '</pre>';
    ?>

    Let me know [by personal email], if someone found a regex to simulate a str_split with mb_split.
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