/**
* Convert full-width Japanese Roman characters to ASCII roman characters.
*
* This helps the user not having to shift out of the Japanese input mode to write ascii stuff.
*
* Note: not thoroughly tested beyond the digits (0-9)
*
* @param string Utf8 string
*
* @return string Utf8 string
*/
static function normalizeFullWidthRomanCharacters($u8s)
{
$aUCS = utf8::toUnicode($u8s);
for ($i = 0; $i < count($aUCS); $i++) {
if ($aUCS[$i] >= 0xff10 && $aUCS[$i] <= 0xff5a) {
$aUCS[$i] = $aUCS[$i] - 0xff00 + 32;
}
}
return utf8::fromUnicode($aUCS);
}
