Use file_get_contents() with cookies and proxy (optionally with auth)

file_get_contents_ex.php

<?php

function file_get_contents_ex($url, $cookie = null, $proxy = null, $auth = null)
{
    $opts = array(
        'http' => array(
            'method'    => 'GET',
            'user-agent'=> 'Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/48.0.2564.109 Safari/537.36',
            'header'    => "Accept-language: en\r\n" .
                           (!empty($auth) ? "Proxy-Authorization: Basic {$auth}\r\n" : '') . 
                           (!empty($cookie) ? "Cookie: ".implode('; ', (array)$cookie)."\r\n" : ''),
        )
    );
    if (!empty($proxy)) {
        $opts['http']['proxy']  = $proxy;
        $opts['http']['request_fulluri'] = true;
    }

    $context = stream_context_create($opts);

    // Open the file using the HTTP headers set above
    return file_get_contents($url, false, $context);
}

$cookie = array(
    'foo=bar',
    'session-token=0Cz+zmPOQ7rIWQQe2Z6HBi14Tjqir/GhDAeGK5KTPxuhJs56YtJAje9RipLHpwPDzuW0XX5NU915iFLqkM+Mq8PaL/Km1sR0nKtL6itVihwfAm0k4g/n4lmIV1ByWhDFnRH9j+ELWwxBR2tsJQvgIjDHsoDBp/hEe61HdNqcr5WLdtHMgYToRr5mXyb5WlVTUfFJego6jkIoxEWuoFZOFbOUEiWOJOs+xZHE80+hB1UvZgsy4bNoqnEDsQBSGFNY'.
);
// See proxy list: http://www.google-proxy.net/
$proxy = 'tcp://104.236.153.33:3128';
$auth = null; // base64_encode('login:password');
$url = 'http://example.com/path/to/page';

echo file_get_contents_ex($url, $cookie, $proxy, $auth);

Great example of headers. Thanks!