header http stream context option is unclear about how to use it

[nielsdos]

On this page: https://www.php.net/manual/en/context.http.php
We have a list of options, among those is "header", which can either be a string or an array. However, it was not clear what the format of the array should be, until I looked at the user notes which fortunately contained a (small) example.

[cmb69]

I think the array shape is the same as what headers_list() returns.

[nielsdos]

Indeed it is, but I had to read the C code to figure that out.