Dynamic DNS

#!/usr/bin/php -q 
<!--?php 
//Define and set baseline variables 
date_default_timezone_set('America/Chicago'); 
$base_path = '/Users/yourusername/php-scripts/opendns/'; 
$fn_ip_address = $base_path . 'UVerse-IP.txt'; 
$fn_log = $base_path . 'opendns.log'; 
$fn_log2 = $base_path . 'opendns2.log'; 
$fn_ctr = $base_path . 'counter.txt'; 
$rtr_url = 'http://192.168.5.5/xslt?PAGE=B01'; 
$dns_uid = 'userid'; 
$dns_passwd = 'password'; 
$dns_host = 'hostname'; 
$twitterusername = 'twitterid'; 
$twitterpassword = 'twitterpass'; 
$ip_regex = '/(\&#91;0-9\&#93;{1,3}).(\&#91;0-9\&#93;{1,3}).(\&#91;0-9\&#93;{1,3}).(\&#91;0-9\&#93;{1,3})/'; 

//Let's display the current date and time echo 
date("F j, Y, g:i a") . "n"; 

//Let's grab the page content off of the router $page_data = get_data($rtr_url); 

// Let's parse the data from our router page and look for the IP address 
preg_match($ip_regex,$page_data,$matches); 
$ip_match = $matches\&#91;1\&#93; . "." . $matches\&#91;2\&#93; . "." . $matches\&#91;3\&#93; . "." . $matches\&#91;4\&#93;; 
echo " Router: " . $ip_match . "n"; 

//Let's go ahead and build our DNSOMatic Updater URL 
$dns_url = "https://" . $dns_uid . ":" . $dns_passwd . "@updates.dnsomatic.com/nic/update?hostname=" . $dns_hst . "&myip=" . $ip_match . "&wildcard=NOCHG&mx=NOCHG&backmx=NOCHG"; 

//Let's check to see if our counter file exists. If it does, let's open the file 
//read its contents and then close the file. 
if (file_exists($fn_ctr)) { 
  $fh = fopen($fn_ctr, 'r') or die("can't open counter file for reading"); 
  $counter = fread($fh, filesize($fn_ctr)); 
  fclose($fh); 
} else { 
  $counter = 0; 
} 

//If we haven't forced an update for a while, let's force one now by deleting the tracker file. 
//Let's also take advantage of this time to trim our log files. 

if ($counter &gt;= 5) { 
  if (file_exists($fn_log2)) { 
    $result = unlink($fn_log2); 
    echo "Deleting old log filen"; 
  } 

  if (file_exists($fn_log)) { 
    $result = rename($fn_log, $fn_log2); 
    echo "Renaming the current log filen"; 
  } 

  if (file_exists($fn_ctr)) { 
    $result = unlink($fn_ctr); 
    echo "Deleting the counter filen"; 
  } 

  if (file_exists($fn_ip_address)) { 
    $result = unlink($fn_ip_address); 
    echo "Deleting the tracker filen"; 
  } 

  $counter = 0; 
} 

//Let's check to see if our IP address tracker file exists. If it does, let's open the file 
//read its contents and then close the file. 

if (file_exists($fn_ip_address)) { 
  $fh = fopen($fn_ip_address, 'r') or die("can't open tracker file"); 
  $ip_previous = fread($fh, filesize($fn_ip_address)); 
  fclose($fh); 
  echo "Previous: " . $ip_previous . "n"; 

  //Let's compare the address we just scraped off the router page to what we captured last time. 
  //If the addresses are the same then quit here. 

  if (trim($ip_previous) == $ip_match) { 
    echo "Address has not changed .... no action taken" . "nn"; 
  } else { 
    //Since our address has changed, let's update our tracker file and OPENDNS 
    echo "Address is different .... updating DNS" . "nn"; 
    $fh = fopen($fn_ip_address, 'w') or die("can't open file"); 
    fwrite($fh, $ip_match); fclose($fh); 
    dns_updater($dns_url); 
    twitter_update($twitterusername,$twitterpassword,'DNS-o-Matic Updated'); 
  } 
} else { 
  //Since our tracker file doesn't exist then we'll create it and force an OPENDNS update 
  $fh = fopen($fn_ip_address, 'w') or die("can't open file"); 
  fwrite($fh, $ip_match); 
  fclose($fh); dns_updater($dns_url); 
  twitter_update($twitterusername,$twitterpassword,'DNS-o-Matic Updated'); 
  $counter = 0; 
} 

$counter = $counter + 1; 
$fh = fopen($fn_ctr, 'w') or die("can't open counter file for writting"); 
fwrite($fh, $counter); fclose($fh); 

//Function to get the data from a URL 

function get_data($url) { 
  $ch = curl_init(); 
  $timeout = 5; 
  curl_setopt($ch,CURLOPT_URL,$url); 
  curl_setopt($ch,CURLOPT_RETURNTRANSFER,1); 
  curl_setopt($ch,CURLOPT_CONNECTTIMEOUT,$timeout); 
  $data = curl_exec($ch); 
  curl_close($ch); 
  return $data; 
} 

function dns_updater($url) { 
  //Let's prepare to run the update by creating a new cURL resource 
  $ch = curl_init(); 
  
  // Let's set our URL and other appropriate options 
  curl_setopt($ch, CURLOPT_URL, $url); curl_setopt($ch, CURLOPT_HEADER, 0); 
  curl_setopt($ch, CURLOPT_SSL_VERIFYPEER,false); 
  
  //Let's fetch the URL and thus perform our update 
  curl_exec($ch); 
  
  //Let's close our cURL resource, and free up system resources 
  curl_close($ch); 
} 

function twitter_update($username, $password, $message) { 
  $message = 'is twittering from php using curl'; 
  
  // The twitter API address 
  $url = 'http://twitter.com/statuses/update.xml'; 
  
  // Alternative JSON version 
  // $url = 'http://twitter.com/statuses/update.json'; 
  // Set up and execute the curl process 
  $curl_handle = curl_init(); curl_setopt($curl_handle, CURLOPT_URL, "$url"); 
  curl_setopt($curl_handle, CURLOPT_CONNECTTIMEOUT, 2); 
  curl_setopt($curl_handle, CURLOPT_RETURNTRANSFER, 1); 
  curl_setopt($curl_handle, CURLOPT_POST, 1); 
  curl_setopt($curl_handle, CURLOPT_POSTFIELDS, "status=$message"); 
  curl_setopt($curl_handle, CURLOPT_USERPWD, "$twitterusername:$twitterpassword"); 
  $buffer = curl_exec($curl_handle); 
  curl_close($curl_handle); 
  
  // check for success or failure 
  if (empty($buffer)) { 
    return 'message'; 
  } else { 
    return 'success'; 
  }
} 

?-->