try visit this code
from
http://www.reconn.us/count_words.html
Code:
function adv_count_words($str)
{
$words = 0;
$str = eregi_replace(" +", " ", $str);
$array = explode(" ", $str);
for($i=0;$i < count($array);$i++)
{
if (eregi("[0-9A-Za-zÀ-ÖØ-öø-ÿ]", $array[$i]))
$words++;
}
return $words;
}