$contact_no = "1234567890";
$message = "Congradulations.Mr.Name.Your Registration successfull.User ID : Name & Password : 12345. Thankyou";
$message = urlencode($message);
$url = 'http://domain.co.in/api/sendsms.php?user=user_id&apikey=KEY&mobile='.$contact_no.'&message='.$message.'&senderid=SENDERID&type=txt';
$xml = file_get_contents($url);
echo $xml;