guzzle-test.php

<?php
include './guzzle.phar';
use Guzzle\Http\Client;

// Create the client with the curl options for verbose
$client = new Client('', array('curl.options' => array(CURLOPT_VERBOSE=>true)));
// create a PURGE request to send
$request = $client->createRequest('PURGE', 'http://127.0.0.1:81/?foo=bar&abc=123');
// Set the Host header
$request->setHeader('Host', 'www.ign.com');
// send the request
$request->send();

output.txt

$> php ./guzzle-test.php 
* About to connect() to www.ign.com port 81 (#0)



what I want it to do is act like:
$> telnet 127.0.0.1 81
Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.
PURGE /?foo=bar&abc=123 HTTP/1.1
Host: www.ign.com
Content-Type: text/plain



It looks like whenever you change/set the Host header in guzzle it changes what host it is trying to 
connect to instead of connecting to the original url and sending a different Host header.

Varnish.php

<?php

class Oyster_Service_Varnish
{

    var $_varnishHosts = array(
        'oyster-varnish-01',
        'oyster-varnish-02',
    );

    public function setVarnishHosts(array $hosts)
    {
        $this->_varnishHosts = $hosts;

        return $this;
    }

    function purge($url)
    {

        if ( empty($url) ) {
            throw new Exception('ERROR: No url specified.');
        } elseif ( strpos($url, '://') !== false ) {
            throw new Exception('Do not include the scheme. Just use the url path. e.g., / or /articles.');
        }

        $redirectHelper = new Oyster_Controller_Action_Helper_Redirect();

        $client = new Zend_Http_Client();

        $domains = array();
        // Create a list of domains that we need to purge
        foreach ( $redirectHelper->getSupportedEnglishLocales() as $locale => $domain ) {
            $domains[$domain . '.ign.com'] = $locale;
            if ( $locale == $redirectHelper->getDefaultLocale() ) {
                $domains['m.ign.com'] = $locale;
            } else {
                $domains['m.' . $domain . '.ign.com'] = $locale;
            }
        }

        foreach ( $domains as $domain => $locale ) {
            $host = strtolower($domain) . '.ign.com';
            // Reset everything for the next set of requests
            $client->resetParameters(true);
            // We're sending a PURGE request
            $client->setMethod('PURGE');
            // Make sure the correct Host header is sent
            $client->setHeaders('Host', $host);
            // Configure the cookies
            $client->setCookie(
                $redirectHelper->getI18nCcPrefCookieName(), 
                $redirectHelper->createI18nCcPrefCookieValue(strtoupper($locale))
            );
            // Loop through each varnish host and send the request
            foreach ($this->_varnishHosts as $varnishHost) {
                $client->setUri('http://' . $varnishHost . $url);
                $client->request();
            }
        }

    }

}