| public static extractKatakana ( string $str, integer $length, boolean $yoon = false ) : array | ||
| $str | string | The input string. |
| $length | integer | (optional) Define an optional substring length. Default to 0 which means substrings will be returned as it is. |
| $yoon | boolean | (optional) Whether considering the base syllable and the following yoon character as a single character or not Default to false. |
| return | array | An array of katakana substrings. |
public static function extractKatakana($str, $length = 0, $yoon = false)
{
// No length given, extract katakana substrings as it is.
if (!$length) {
return preg_split(self::PREG_PATTERN_NOT_KATAKANA, $str, 0, PREG_SPLIT_NO_EMPTY);
}
// Otherwise...
// remove any non katakana characters and split the remaining string as per
// the given length
$str = preg_replace(self::PREG_PATTERN_NOT_KATAKANA, "", $str);
return self::split($str, $length, $yoon);
} public function testExtractKatakanaIssue24()
{
$result = Helper::extractKatakana('カタカナ|ヒラガナ');
$this->assertSame(array('カタカナ', 'ヒラガナ'), $result);
}
