如何在php中列出所有国家及其州/省？

是否有任何快速指南/参考列出所有国家及其州/省？

就像我点击美国一样,它会列出:阿拉巴马州,阿拉斯加州等

pycountry是我能找到的最完整的免费参考:

pycountry provides the ISO databases for the standards:

639 Languages
3166 Countries
3166-2 Subdivisions of countries
4217 Currencies
15924 Scripts

The databases are imported from Debian's pkg-isocodes, packaged into pycountry and made accessible through a Python API.

Translation files for the various strings are included as well.