<?php
$fp = fsockopen("www.reg.ru", 443, $errno, $errstr, 30);
if (!$fp) {
    echo "$errstr ($errno)
\n";
} else {
    $out = "GET /api/regru?username=login&password=password&action=domain_check&domain_name=ya.ru HTTP/1.1\r\n";
    $out .= "Host: www.reg.ru\r\n";
    $out .= "Connection: Close\r\n\r\n";
    fwrite($fp, $out);
    while (!feof($fp)) {
        echo fgets($fp, 128);
    }
    fclose($fp);
}
?>