use VPS IP as proxy?

<?php

$ch = curl_init(); 
curl_setopt($ch, CURLOPT_URL, 'http://www.google.com/'); 
curl_setopt($ch, CURLOPT_USERAGENT, "Internet Explorer 6.0 (Windows XP)");
curl_setopt($ch, CURLOPT_HEADER, 1); 
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); 
curl_setopt($ch, CURLOPT_HTTPPROXYTUNNEL, 1); 
curl_setopt($ch, CURLOPT_PROXY, '64.10.344.51:100'); 
curl_setopt($ch, CURLOPT_PROXYUSERPWD, 'myusername:mypassword'); 
$data = curl_exec($ch); 
curl_close($ch); 
 
echo $data;
?>

http://www.howtoforge.com/anonymous-proxy-using-squid-3-centos-5.x
http://www.cyberciti.biz/tips/howto-rhel-centos-fedora-squid-installation-configuration.html

<?php
$ch = curl_init(); 
curl_setopt($ch, CURLOPT_URL, 'http://www.google.com'); 
curl_setopt($ch, CURLOPT_HEADER, 1); 
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); 
curl_setopt($ch, CURLOPT_HTTPPROXYTUNNEL, 1); 
curl_setopt($ch, CURLOPT_PROXY, '00.00.000.00:3128'); 
curl_setopt($ch, CURLOPT_PROXYUSERPWD, 'username:password'); 
$data = curl_exec($ch); 
curl_close($ch); 

echo $data
?>

curl_setopt($ch, CURLOPT_PROXYPORT, 3128);

curl_setopt($ch, CURLOPT_PROXYTYPE, CURLPROXY_SOCKS5);