php - load xml file with authentication (and improving security) -

i'm trying use simplexml load xml file server:

$xml = simplexml_load_file($xml_query);

the server needs http authentication, (unsurprisingly) error message:

http request failed! http/1.1 401 unauthorized

is possible pass username , password server using function?

edit

if can tell me more secure way this, i'd grateful.

you should able prepend username , password url you're opening. instead of

http://link.to/file.xml

try

http://username:password@link.to/file.xml

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