word_limiter()

word_limiter($str[, $limit = 100[, $end_char = '…']])

Truncates a string to the number of words specified. Example:

$string = "Here is a nice text string consisting of eleven words.";
$string = word_limiter($string, 4);
// Returns:  Here is a nice

The third parameter is an optional suffix added to the string. By default it adds an ellipsis.