function check($host, $find) {
    $fp = fsockopen($host, 80, $errno, $errstr, 10);
    if (!$fp) {
        echo "$errstr ($errno)\n";
    } else {
       $header = "GET / HTTP/1.1\r\n";
       $header .= "Host: $host\r\n";
       $header .= "Connection: close\r\n\r\n";
       fputs($fp, $header);
       while (!feof($fp)) {
           $str .= fgets($fp, 1024);
       }
       fclose($fp);
       return (strpos($str, $find) !== false);
    }
}

function alert($host) {
    mail('joseph.e.landolfi@gmail.com', 'Monitoring', $host.' down');
}

$host = 'www.ubsassociates.com';
$find = 'We help clients';
if (!check($host, $find)) alert($host);