$ composer config repos.packagist composer https://php.cnpk
$ composer config repos.packagist composer https://php.cnpkg.org
$ composer config cache-files-maxsize 2048MiB
Link：https://www.cnblogs.com/farwish/p/12233575.html
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![[转]Node.js中package.json中^和~的区别](/uploads/allimg/200519/054J34453_lit.png "[转]Node.js中package.json中^和~的区别")