$k = microtime(1);
$url = "http://www.part-kom.ru/engine/api/v2/search/parts";
$array =  json_decode('{"number":"4PK875","brand_id":"710","find_substitutes":0,"store":0}');
$username = "eezap.ru";
$password = "**********"; //наш пароль
$url .= "?" . http_build_query($array);
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_TIMEOUT, 30); //timeout after 30 seconds
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_HTTPAUTH, CURLAUTH_BASIC);
curl_setopt($ch, CURLOPT_USERPWD, "$username:$password");
$result = curl_exec($ch);
curl_close($ch);
echo microtime(1)-$k; // 9 секунд