$url = 'https://google.com';
$proxy = '46.254.20.37:8888';
$proxyauth = 'user:password';
$ch = curl_init ();
curl_setopt ($ch, CURLOPT_URL, $url);
curl_setopt ($ch, CURLOPT_PROXY, $proxy);
curl_setopt ($ch, CURLOPT_PROXYUSERPWD, $proxyauth);
curl_setopt ($ch, CURLOPT_PROXYTYPE, CURLPROXY_SOCKS5);
curl_setopt ($ch, CURLOPT_FOLLOWLOCATION, 1);
curl_setopt ($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt ($ch, CURLOPT_SSL_VERIFYPEER, false);
curl_setopt ($ch, CURLOPT_SSL_VERIFYHOST, false);
curl_setopt ($ch, CURLOPT_HEADER, 1);
$output = curl_exec ($ch);
curl_close ($ch);
echo $output;