mb_convert_kana

(PHP 4 >= 4.0.6, PHP 5, PHP 7, PHP 8)

mb_convert_kana — Convert "kana" one from another ("zen-kaku", "han-kaku" and more)

Description

mb_convert_kana(string $string, string $mode = "KV", ?string $encoding = null): string

Performs a "han-kaku" - "zen-kaku" conversion for string string. This function is only useful for Japanese.

Parameters

string

The string being converted.

mode

The conversion option.

Specify with a combination of following options.

**Applicable Conversion Options**
Option	Meaning
`r`	Convert "zen-kaku" alphabets to "han-kaku"
`R`	Convert "han-kaku" alphabets to "zen-kaku"
`n`	Convert "zen-kaku" numbers to "han-kaku"
`N`	Convert "han-kaku" numbers to "zen-kaku"
`a`	Convert "zen-kaku" alphabets and numbers to "han-kaku"
`A`	Convert "han-kaku" alphabets and numbers to "zen-kaku" (Characters included in "a", "A" options are U+0021 - U+007E excluding U+0022, U+0027, U+005C, U+007E)
`s`	Convert "zen-kaku" space to "han-kaku" (U+3000 -> U+0020)
`S`	Convert "han-kaku" space to "zen-kaku" (U+0020 -> U+3000)
`k`	Convert "zen-kaku kata-kana" to "han-kaku kata-kana"
`K`	Convert "han-kaku kata-kana" to "zen-kaku kata-kana"
`h`	Convert "zen-kaku hira-gana" to "han-kaku kata-kana"
`H`	Convert "han-kaku kata-kana" to "zen-kaku hira-gana"
`c`	Convert "zen-kaku kata-kana" to "zen-kaku hira-gana"
`C`	Convert "zen-kaku hira-gana" to "zen-kaku kata-kana"
`V`	Collapse voiced sound notation and convert them into a character. Use with "K","H"

encoding

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

Return Values

The converted string.

Errors/Exceptions

Throws a ValueError if the combination of different modes is invalid. For example "sS".

Changelog

Version	Description
8.2.0	A ValueError is now thrown if the combination of different `mode`s is invalid.
8.0.0	`encoding` is nullable now.

Examples

Example #1 mb_convert_kana() example

<?php
/* Convert all "kana" to "zen-kaku" "kata-kana" */
$str = mb_convert_kana($str, "KVC");

/* Convert "han-kaku" "kata-kana" to "zen-kaku" "kata-kana" 
   and "zen-kaku" alphanumeric to "han-kaku" */
$str = mb_convert_kana($str, "KVa");
?>

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User Contributed Notes 3 notes

down

jdavide222 at hotmail dot com ¶

11 years ago

to make this function work you have to add following two lines above this function.

mb_language("Ja");
mb_internal_encoding("utf-8");

mb_convert_kana($_POST['something_value'], "rna");

down

d at safetypub dot org ¶

19 years ago

I didn't find Japanese sorting function. 
(mb_sort_kana or something)
Only SJIS encoding treats hankaku kata kana,
 I can't post here copy & paste version script.
I'm sorry...
You will replace comments with appropriate japanese string,
and write exception handlings between lines as you like.

<?php
mb_internal_encoding("SJIS");

$moji = /*"aiueo...wawon -?.," <- serialized hankaku kata kana 50 on hyou goes here*/;
$moji .= "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxwz0123456789";

for($i = 0; isset($moji[$i]); $i++){
    $pittan[$moji[$i]] = $i;
}

function cmp($a, $b)
{
   if ($a == $b) {
       return 0;
   }
   return iter(mb_convert_kana($a, "askh") ,mb_convert_kana($b, "askh"), 0);
}

function iter($a, $b, $i){
    global $pittan;
    if(!isset($a[$i]) || !isset($b[$i])){
        return (isset($b[$i]))? -1 : 1;
    }
    if ($pittan[$a[$i]] == $pittan[$b[$i]]){
        return iter($a, $b, ++$i);
    }
    return (($pittan[$a[$i]]) < ($pittan[$b[$i]]))? -1 : 1;
}

echo "<pre>";
$arr = array(/*some japanese array here*/);
usort($arr, "cmp");
var_dump($arr);
?>

down

-1

dn at littlealf dot net ¶

21 years ago

It seems that mb_convert_kana() doesn't convert symbols such as ' (single quoatation). It affected my program when I insert data into database. 

So, I've found 2 ways to solve this.
1) Use Javascript to convert those non-supported symbols before sending query string to your php page.
2) Use php function, str_replace $str, to replace those non-supported symbols. For example, $str = str_replace("'", "?", $str);
where the first single quot is half-width(han kaku), and the second one is full-width(zen kaku).

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