Here's how to convert romaji to katakana/hiragana with PHP (transliterating Japanese text).
The function Romaji2Kana($s) will return with keys 'hira' and 'kata' that respectively contain the hiragana and katakana versions of the given string in UTF-8 encoding.
<?php
define('HIRATABLE', 'a A i I u U e E o O KAGAKIGIKUGUKEGEKOGOSAZASIZISUZUSEZESOZO'.
'TADATIDItuTUDUTEDETODONANINUNENOHABAPAHIBIPIHUBUPUHEBEPEHOBOPO'.
'MAMIMUMEMOyaYAyuYUyoYORARIRUREROwaWAWIWEWOn ');
define('KATATABLE', 'a A i I u U e E o O KAGAKIGIKUGUKEGEKOGOSAZASIZISUZUSEZESOZO'.
'TADATIDItuTUDUTEDETODONANINUNENOHABAPAHIBIPIHUBUPUHEBEPEHOBOPO'.
'MAMIMUMEMOyaYAyuYUyoYORARIRUREROwaWAWIWEWOn VUkake');
function HiraTrans($s)
{
$pos = strpos(HIRATABLE, $s);
if($pos===false) return 0xA1BC; return 0xA4A1 + $pos/2;
}
function KataTrans($s)
{
$pos = strpos(KATATABLE, $s);
if($pos===false) return 0xA1BC; return 0xA5A1 + $pos/2;
}
function Romaji2Kana($s)
{
$s = strtoupper(str_replace(
Array('shi', 'sh', 'fu', 'chi', 'ch', 'tsu', 'dz', 'l', '-',
'â', 'î', 'û', 'ê', 'ô', 'ā', 'ī', 'ū', 'ē', 'ō'),
Array('si', 'sy', 'hu', 'ti', 'ty', 'tu', 'j', 'r', '^',
'a^', 'i^', 'u^', 'e^', 'o^', 'a^', 'i^', 'u^', 'e^', 'o^'),
$s));
$s = preg_replace('@F([AIOE])@e', '"HU".strtolower("\1")', $s);
$s = preg_replace('@V([AIUEO])@e', '"VU".strtolower("\1")', $s);
$s = preg_replace('@([KSTNHMRGZBPD])Y([AUO])@e', '"\1Iy".strtolower("\2")', $s);
$s = preg_replace('@X(TU|Y[AUO]|[AIUEO]|KA|KE)@e', 'strtolower("\1")', $s);
$s = preg_replace('@([KSTHMRYWGZBPDV]{2,})@e',
'str_pad("",2*strlen("\1")-2,"tu").substr("\1",0,1)', $s);
$s = preg_replace('@N(?![AIUEO])@', 'n', $s);
$s = eregi_replace('[^^VAIUEOKSTNHMYRWGZBPD]', '', $s);
$pat = '@([AIUEOnaiueo^]|..)@e';
$rec = 'EUCJP..UTF8';
return
Array('hira' => recode_string($rec,preg_replace($pat, 'pack("n", HiraTrans("\1"))', $s)),
'kata' => recode_string($rec,preg_replace($pat, 'pack("n", KataTrans("\1"))', $s)));
}
print_r( Romaji2Kana('konnichiha') );
?>
Note: Due to technical limitations in the manual pages, there are two errors in this code:
- Some characters in the first str_replace may appear wrong in some php.net mirrors. It supposed to contain aiueo with circumflex and aiueo with macron.
- The strings in the defines should be constant, not appendage expressions. (Line length limitation)
-Joel Yliluoma