CURLOPT_PROXY

header('Content-type: text/html; charset=utf-8');
	
$proxy ='11.111.111.11:8080'; 
$test_url = 'http://ANY-SITE'; 


$headers = array(
		   'x-requested-with: XMLHttpRequest',
		   'accept: application/json, text/javascript, */*; q=0.01',
		   'accept-language: ru-RU,ru;q=0.8,en-US;q=0.6,en;q=0.4,uk;q=0.2',
		   'user-agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_10_2) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/40.0.2214.111 Safari/537.36'
		);

$c = curl_init (); 
curl_setopt ($c , CURLOPT_URL , $test_url); 
curl_setopt ($c , CURLOPT_USERAGENT , "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_10_2) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/40.0.2214.111 Safari/537.36"); 
curl_setopt($c, CURLOPT_PROXY, $proxy); 
curl_setopt($c, CURLOPT_HEADER, $headers); 
curl_setopt($c, CURLOPT_NOBODY, 1); 
curl_setopt($c, CURLOPT_RETURNTRANSFER, 1); 
$curl_error = curl_error($c); 
$header_response = curl_exec($c); 
curl_close($c); 


if (strpos($header_response, '200 OK') !== false) 
{ 

	echo 'OK';

} 
else 
{ 
	if (!empty($header_response)) 
	{ 
		echo 'Ответ сервера - неудача'; 
	} 
	else 
	{ 
		echo $curl_error; 
	} 
}