function c2c_hyperlink_urls ($text, $mode='0', $trunc_before='', $trunc_after='...', $open_in_new_window=true) {
    $text = ' ' . $text . ' ';
    $new_win_txt = ($open_in_new_window) ? ' target="_blank"' : '';
        
    // Hyperlink Class B domains *.(com|org|net|gov|edu|us|info|biz|ws|name|tv)(/*)
    $text = preg_replace("#([\s{}\(\)\[\]])([A-Za-z0-9\-\.]+)\.(com|org|net|gov|edu|us|info|biz|ws|name|tv)((?:/[^\s{}\(\)\[\]]*[^\.,\s{}\(\)\[\]]?)?)#ie",
        "'$1<a href=\"http://$2.$3$4\" title=\"http://$2.$3$4\"$new_win_txt>' . c2c_truncate_link(\"$2.$3$4\", \"$mode\", \"$trunc_before\", \"$trunc_after\") . '</a>'",
        $text);

    // Hyperlink e-mail addresses
    $text = preg_replace("#([\s{}\(\)\[\]])([A-Za-z0-9\-_\.]+?)@([^\s,{}\(\)\[\]]+\.[^\s.,{}\(\)\[\]]+)#ie",
        "'$1<a href=\"mailto:$2@$3\" title=\"mailto:$2@$3\">' . c2c_truncate_link(\"$2@$3\", \"$mode\", \"$trunc_before\", \"$trunc_after\") . '</a>'",
        $text);

    return substr($text,1,strlen($text)-2);
}

function c2c_truncate_link ($url, $mode='0', $trunc_before='', $trunc_after='...') {
    if (1 == $mode) {
                $url = preg_replace("/(([a-z]+?):\\/\\/[A-Za-z0-9\-\.]+).*/i", "$1", $url);
                $url = $trunc_before . preg_replace("/([A-Za-z0-9\-\.]+\.(com|org|net|gov|edu|us|info|biz|ws|name|tv)).*/i", "$1", $url) . $trunc_after;
        } elseif (($mode > 10) && (strlen($url) > $mode)) {
                $url = $trunc_before . substr($url, 0, $mode) . $trunc_after;
        }
        return $url;
}

function convertLinks($text) {
	$text = preg_replace("/(\r\n|\n|\r)/", "\n", $text);
	$lines = explode("\n", $text);
	for ($x = 0, $y = count($lines); $x < $y; $x++) {
		$line = $lines[$x];
		$words = explode(' ', $line);
		for ($i = 0, $j = count($words); $i < $j; $i++) {
			$word = $words[$i];
			$punctuation = '.,\'")(<>;:'; // Links may not end in these
			if (substr($word, 0, 7) == 'http://' ||	substr($word, 0, 4) == 'www.') {
				$trailing = '';
				// Knock off ending punctuation
				$last = substr($word, -1);
				while (strpos($punctuation, $last) !== false) {
					// Last character is punctuation - eliminate it
					$trailing .= $last;
					$word = substr($word, 0, -1);
					$last = substr($word, -1);
				}
				// Make link, add trailing punctuation back afterwards
				$link = $word;
				if (substr($link, 0, 4) == 'www.') {
					// This link needs an http://
					$link = 'http://'.$link;
				}
				$word = '<a href="'.str_replace('&', '&amp;', $link).'">'.str_replace('&', '&amp;', $word).'</a>'.$trailing;
			}
			$words[$i] = $word;
		}
		$lines[$x] = implode(' ', $words);
	}
	return c2c_hyperlink_urls(implode("\n", $lines));
}




//Eksempel
echo convertLinks($forumpostInnhold);