If you are interested to use the urlB.org API from within PHP, here is a simple wrapper.

First download urlborg.php (and, of course, make sure you have your API key).

Now, creating short URLs and getting info about them is easy. Here is an example:

require_once 'urlborg.php' ;
$ub = new urlBorg('use your API key here') ;
$info = $ub->get_info('lgfy') ;
if ($ub->get_error()) { 
   echo '
ERROR! Code:' . $ub->get_error('n') . 
   ' desc:' . $ub->get_error('s') ; 
} else {
   print_r($info) ;
}
$short = $ub->create_new('http://vrypan.net/') ;
if ($ub->get_error()) { 
    echo '
ERROR! Code:' . $ub->get_error('n') . 
    ' desc:' . $ub->get_error('s') ; 
} else {
    print_r($short) ;
}

(the example is included in the class headers. Don't copy-paste it from this post since Wordpress seems to change the quotes in ways that PHP doesn't like :-)