PHP cURL within a form - php

Question

I am trying to perform a cURL request within a form. Basically I have a page called monitoringform.php results.php and curl.php. When the user enters a MAC address into the form and presses submit, i would like the value of mac address to process through curl.php, obtain the result and post it in results.php. The cURL function works fine but I cannot get it to POST to results.php While I was playing around I noticed sometimes the IP shows up however it is incorrect. Can it be old data from the session? Any help is greatly appreciated!
monitoringform.php
<?php session_start(); ?>
<h3>Monitoring Request Form</h3>
<form name="form1" id="form1" action="" method="post">
<label for="regularInput">Modem MAC</label>
<input type="text" name="modemmac" id="modemmac" />
<button type="submit" name="submit">Submit Form</button>
</form>
results.php
<?php session_start(); ?>
<?php
include "curl.php";
$mactosearch = $_POST['modemmac'];
$mymessage=$_GET["message"];
if($mymessage=="success")
{
echo "<b>Modem IP Address:</b> $modemip <br />";
}
else{ echo "You are getting error";}
?>
curl.php
<?php
// Defining the basic cURL function
function curl($url) {
// Assigning cURL options to an array
$options = Array(
CURLOPT_RETURNTRANSFER => TRUE, // Setting cURL's option to return the webpage data
CURLOPT_FOLLOWLOCATION => TRUE, // Setting cURL to follow 'location' HTTP headers
CURLOPT_AUTOREFERER => TRUE, // Automatically set the referer where following 'location' HTTP headers
CURLOPT_CONNECTTIMEOUT => 120, // Setting the amount of time (in seconds) before the request times out
CURLOPT_TIMEOUT => 120, // Setting the maximum amount of time for cURL to execute queries
CURLOPT_MAXREDIRS => 10, // Setting the maximum number of redirections to follow
CURLOPT_USERAGENT => "Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.1a2pre) Gecko/2008073000 Shredder/3.0a2pre ThunderBrowse/3.2.1.8", // Setting the useragent
CURLOPT_URL => $url, // Setting cURL's URL option with the $url variable passed into the function
);
$ch = curl_init(); // Initialising cURL
curl_setopt_array($ch, $options); // Setting cURL's options using the previously assigned array data in $options
$data = curl_exec($ch); // Executing the cURL request and assigning the returned data to the $data variable
curl_close($ch); // Closing cURL
return $data; // Returning the data from the function
}
// Defining the basic scraping function
function scrape_between($data, $start, $end){
$data = stristr($data, $start); // Stripping all data from before $start
$data = substr($data, strlen($start)); // Stripping $start
$stop = stripos($data, $end); // Getting the position of the $end of the data to scrape
$data = substr($data, 0, $stop); // Stripping all data from after and including the $end of the data to scrape
return $data; // Returning the scraped data from the function
}
$scraped_page = curl("http://localhost?q_mac=$mactosearch&fields=only:ip");
$modemip = scrape_between($scraped_page, "<ip>", "</ip>");
}
?>