massive words

hi all, looking for some advice on the best way to approach this: i have a guestbook running on a few sites, and occasionally we get "creative" people who think it's a good idea to post messages with really long words or URLs into the text, which totally mess up the layout of the page. what I need is an efficient way of checking the input for extremely long words (say about 60-odd characters +) I assume I just split the input by " " (space) into an array, and check that each "word" isn't longer than 60 chars, but this seems like a lot of work for the server... although I am limiting the entire input to 2000 chars, so maybe this isn't too much work for the server? this is what I'm using: <? $word_length = 5; $error = 0; $str = "cat dog bird mouse elephant"; // illegal $str = explode(" ", $str); foreach($str as $key => $word) { if(strlen($word) > $word_length) { $error = 1; } } if($error) { echo "sorry"; } else { $str = implode(" ", $str); echo $str."<BR>"; } ?> any ways to improve it? Justin