Shorten Text Without Breaking Mid-Word

gistfile1.php

<?php
function shorten($n, $l=75, $e=' ...') {
    if ($l >= strlen($n)) { return $n; }
    $n = explode(' ', substr($n, 0, $l));
    if (count($n)>1) { unset($n[count($n)-1]); }
    return implode(' ', $n).$e;
}

echo shorten('Lorem ipsum dolor sit amet, consectetur adipiscing elit. Cras gravida purus gravida enim interdum bibendum non vel enim. In et massa eu nibh pellentesque porta.');
?>