bool|int getStrength() Not supported. Get current collator's strength.

abstract string format(DateTime $dateTime, int $length)

class Locale extends Locale Provides

class StructuredBundleReader implements

getCurrencies()

string[] getLanguageNames(string $displayLocale = null) Returns the names of all known languages

class LocaleDataProvider Data provider for locale-related ICU data.

string getBundleName() Returns the name of the compiled resource bundle.

string getReverseMatchingRegExp(int $length) Returns a reverse matching regular expression of

Filesystem getFilesystem()