<?php
$url = "http://sms.pswin.com/http4sms/send.asp";
$data = "USER=usernamehere&PW=passwordhere&RCV=4799495153&TXT=Please+send+me+a+copy+of+the+datamodel.+Rgds,+John";
$params = array('http' => array(
'method' => 'POST',
'header'=> "Content-type: application/x-www-form-urlencoded\r\n" . "Content-Length: " . strlen($data) . "\r\n",
'content' => $data
));
$ctx = stream_context_create($params);
$fp = @fopen($url, 'rb', false, $ctx);
if (!$fp)
throw new Exception("Problem with $url, $php_errormsg");
$response = @stream_get_contents($fp);
if ($response === false)
throw new Exception("Problem reading data from $url, $php_errormsg");
echo $response;
?>