I used this code for a property publishing company. I haven't adapted it for your use, but you might be able to grasp the concept from it. Cheers
<?
$ones = array("zero",
"one",
"two",
"three",
"four",
"five",
"six",
"seven",
"eight",
"nine",
"ten",
"eleven",
"twelve",
"thirteen",
"fourteen",
"fifteen",
"sixteen",
"seventeen",
"eighteen",
"nineteen");
$tens = array("",
"",
"twenty",
"thirty",
"forty",
"fifty",
"sixty",
"seventy",
"eighty",
"ninety");
$number = $affected_rows<20 ? $ones[$affected_rows] : ($tens[(int) ($affected_rows / 10)] .' '. $ones[$affected_rows % 10]);?>
<p><?=$number=="one" ? '<strong>Your' : ('<strong>'.ucwords($number).'</strong>')?> propert<?=$number=='one'?'y was':'ies were'?> automatically published.<?=$number=="one" ? '</strong>' : ''?></p>