URL shortening service

[eluser]xwero[/eluser]
[quote author="TheFuzzy0ne" date="1243964884"]My take on a similar service:

Code:

function shorten_url($url)
{
    return substr($url, 0, 1);
}

(Sorry, couldn't resist). [/quote]
It doesn't work as you return h every time or if you are lucky someone will get f, g, m, t or s. If you want an url shortener service quick and dirty try

Code:

function shorten_url($url)
{
   file_put_contents('urls.php', '$urls[] = '.$url.';'.PHP_EOL, FILE_APPEND | LOCK_EX);
   return count(file('urls.php'))-1; // remove <?php line from the count
}

function elongate_url($url)
{
   include('urls.php');

   if(isset($urls[$url]))
   {
      header('Location: '$urls[$url]);
      exit;
   }

   header('Location: '$_SERVER['HTTP_REFERER']);
   exit;
}