(PHP 5 >= 5.5.0, PHP 7, PHP 8)
IntlBreakIterator::getPartsIterator — Create iterator for navigating fragments between boundaries
$type = IntlPartsIterator::KEY_SEQUENTIAL): IntlPartsIterator本函数还未编写文档，仅有参数列表。
typeOptional key type. Possible values are:
IntlPartsIterator::KEY_SEQUENTIAL - The default. Sequentially increasing integers used as key. IntlPartsIterator::KEY_LEFT - Byte offset left of current part used as key. IntlPartsIterator::KEY_RIGHT - Byte offset right of current part used as key.