$ops = [
    "http" => [
        "method" => "GET",
        "header" => "Content-Type: text/html; charset=utf-8\r\n" .
            "Content-Language: es\r\n" .
            "Content-Encoding: UTF-8\r\n"
    ]
];
 
$context = stream_context_create($ops);
 
$data = file_get_contents('http://example.com/', false, $context);