function wordify($x)
{
// Works for 1 .. 1000
static $lookup = array(1 => 'one', 2 => 'two', 3 => 'three', 4 => 'four', 5 => 'five', 6 => 'six', 7 => 'seven', 8 => 'eight', 9 => 'nine', 10 => 'ten', 11 => 'eleven', 12 => 'twelve', 13 => 'thirteen', 14 => 'fourteen', 15 => 'fifteen', 16 => 'sixteen', 17 => 'seventeen', 18 => 'eighteen', 19 => 'nineteen', 20 => 'twenty', 30 => 'thirty', 40 => 'forty', 50 => 'fifty', 60 => 'sixty', 70 => 'seventy', 80 => 'eighty', 90 => 'ninety');
if (array_key_exists($x, $lookup)) {
return $lookup[$x];
}
if ($x == 1000) {
return 'one thousand';
}
if ($x >= 100) {
$subResult = wordify(intval($x / 100)) . ' hundred';
$rest = $x % 100;
if ($rest > 0) {
$subResult .= ' and ' . wordify($rest);
}
return $subResult;
}
if ($x > 10) {
$subResult = wordify(10 * intval($x / 10));
$rest = $x % 10;
if ($rest > 0) {
$subResult .= wordify($rest);
}
return $subResult;
}
trigger_error('Unreachable code reached for x=' . $x . '.', E_USER_ERROR);
}
function makeNumberWords($num)
{
$teens = array("zero" => "ten", "one" => "eleven", "teen" => "eleven", "two" => "twelve", "three" => "thirteen", "four" => "fourteen", "five" => "fifteen", "six" => "sixteen", "seven" => "seventeen", "eight" => "eighteen", "nine" => "nineteen");
$words = array();
$digits = str_split((string) $num);
$count = count($digits);
$x = 0;
for ($i = $count; $i > 0; $i--) {
$word = wordify($digits[$i - 1], $count - $i);
if ($word == "teen") {
$words[$x - 1] = $teens[$words[$x - 1]];
$words[] = "";
} else {
$words[] = $word;
}
$x++;
}
return $words;
}