<?php
        /*
         *  To use Bit.ly service you need to enter your Username and API Key below
         *  To use Adf.ly service you need to enter your User ID and API Key below
         */
 
        // Get the args
        $text = $_POST['text'];
        $shortener = $_GET['shortener'];
 
        // Explode the submited text
        $pieces = explode(" ", $text);
 
        // For each element in array check if it is a link, shorten and replace it in passed text
        foreach ($pieces as $piece) {
            if (preg_match("/(^|[\n ])([\w]*?)((ht|f)tp(s)?:\/\/[\w]+[^ \,\"\n\r\t<]*)/is", $piece)) {
                $newsmallurl = call_shortener($shortener, $piece);
                $text = str_replace($piece, $newsmallurl, $text);
            }
        }
 
        // Print final text (with shortened URLs) and send it to Twitter as a status
        echo $text . "<br /><br />";
        $textenc = urlencode($text);
        echo "<a href='http://twitter.com/home?status=$textenc'>Tweet this!</a>";
 
        // Choose the correct function based on the passed argument
        function call_shortener($shortener, $passedurl) {
            // Determine which function to call
            if ($shortener == 'tinyurl') {
                    $shorturl = shortTinyURL($passedurl);
            } elseif ($shortener == 'bitly') {
                    $shorturl = shortBitly($passedurl);
            } elseif ($shortener == 'supr') {
                    $shorturl = shortSupr($passedurl);
            } elseif ($shortener == 'isgd') {
                    $shorturl = shortIsgd($passedurl);
            } elseif ($shortener == 'l4uin') {
                    $shorturl = shortL4uin($passedurl);
            } elseif ($shortener == 'toly') {
                    $shorturl = shortToly($passedurl);
            } elseif ($shortener == 'adfly') {
                    $shorturl = shortAdfly($passedurl);
            } elseif ($shortener == 'kwnme') {
                    $shorturl = shortKwnme($passedurl);
            } 
 
            // Return the shortened URL
            return $shorturl;
        }
 
        // TinyURL shortener
        function shortTinyURL($ToConvert) {
            $short_url = file_get_contents('http://tinyurl.com/api-create.php?url=' . $ToConvert);
            return $short_url;
        }
 
        // Bit.ly shortener
        function shortBitly($ToConvert) {
            $bitlylogin = 'YOUR_USERNAME';
            $bitlyapikey = 'YOUR_API_KEY';
            $bitlyurl = file_get_contents('http://api.bit.ly/shorten?version=2.0.1&longUrl=' . $ToConvert . '&login=' . $bitlylogin . '&apiKey=' . $bitlyapikey);
            $bitlycontent = json_decode($bitlyurl,true);
            $bitlyerror = $bitlycontent['errorCode'];
            $short_url = $bitlycontent['results'][$ToConvert]['shortUrl'];
            return $short_url;
        }
 
        // Su.pr shortener
        function shortSupr($ToConvert) {
            $short_url = file_get_contents('http://su.pr/api?url=' . $ToConvert);
            return $short_url;
        }
 
        // Is.gd shortener
        function shortIsgd($ToConvert) {
            $short_url = file_get_contents('http://www.is.gd/api.php?longurl=' . $ToConvert);
            return $short_url;
        }
 
        // L4u.in shortener
        function shortL4uin($ToConvert) {
            $short_url = file_get_contents('http://www.l4u.in/?module=ShortURL&file=Add&mode=API&url=' . $ToConvert);
            return $short_url;
        }
 
        // To.ly shortener
        function shortToly($ToConvert) {
            $ch = curl_init();
            curl_setopt($ch, CURLOPT_URL, "http://to.ly/api.php?longurl=".urlencode($ToConvert));
            curl_setopt($ch, CURLOPT_RETURNTRANSFER,1);
            curl_setopt($ch, CURLOPT_HEADER, 0);
            $shorturl = curl_exec ($ch);
            curl_close ($ch);
            return $short_url;
        }
 
        // Adf.ly shortener
        function shortAdfly($ToConvert) {
            $APIKey = 'YOUR_API_KEY';
            $UserID = 'YOUR_USER_ID';
            $ShortType = 'int'; // or 'banner'
            $short_url = file_get_contents('http://adf.ly/api.php?key=' . $APIKey . '&uid=' . $UserID . '&advert_type=' . $ShortType . '&url=' . $ToConvert);
            return $short_url;
        }
 
        // Kwn.me shortener
        function shortKwnme($ToConvert) {
            $short_url = file_get_contents('http://kwn.me/t.php?process=1&url=' . $ToConvert);
            return $short_url;
        }
?>

http://forr.st/~Cyl

This script parses the entered text and it gets all URLs from the text. It will then shorten those URLs and replace the long URLs with shortened ones in the text.
If you need only the Shortener Services script, take a look at this snippet <a href="http://snipplr.com/view/44115/shortener-services/">http://snipplr.com/view/44115/shortener-services/</a>

Find URLs In a Text and Shorten Them

url, text

PHP