如何使用PHP file_get_contents从私有bitbucket存储库获取内容？

I want to retrieve a file content (it is read not download) from a private repository in bitbucket?

In this dock it says basic authentication (username/password), but I dont know how to implement it in PHP.

$data = file_get_contents(username/password@https://bitbucket.org/myname/repositoryname/src/master/foldre1/file.txt);