mb_convert_kana

(PHP 4 >= 4.0.6, PHP 5)

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

Description

string mb_convert_kana ( string str [, string option [, string encoding]] )

mb_convert_kana() performs "han-kaku" - "zen-kaku" conversion for string str. It returns converted string. This function is only useful for Japanese.

option is conversion option. Default value is "KV".

encoding is character encoding. If it is omitted, internal character encoding is used.

Specify with combination of following options. Default value is KV.

表格 1. Applicable Conversion Options

OptionMeaning
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"

例子 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" alpha-numeric to "han-kaku" */
$str = mb_convert_kana($str, "KVa");
?>


add a note add a note User Contributed Notes
d at safetypub dot org
01-Apr-2005 07:00
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);
?>
dn at littlealf dot net
24-Jul-2003 12:33
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).