stream_context_create

http://www.php.net/manual/en/function.file-get-contents.php

<?php
// Create a stream
$opts = array(
'http'=>array(
'method'=>"GET",
'header'=>"Accept-language: en\r\n" .
"Cookie: foo=bar\r\n"
)
);

$context = stream_context_create($opts);

// Open the file using the HTTP headers set above
$file = file_get_contents('http://www.example.com/', false, $context);
?>

stream_context_create() 컨텍스트 옵션을 추가할 수 있다.