truncate text to a specific word length

gistfile1.txt

function truncate($text, $length, $more = '...')
{
	$text = strip_shortcodes( $text );
	
	//$text = apply_filters('the_content', $text);
	$text = str_replace(']]>', ']]>', $text);
	$text = strip_tags($text);
	$words = explode(' ', $text, $length + 1);
	if (count($words) > $length) {
		array_pop($words);
		$text = implode(' ', $words);
		$text = $text . ' ' . $more;
	}	
	return $text;
}