## mark a section (Learn more)

<?php function numToStr($number) { $numMap = array( 1 => 'One', 2 => 'Two', 3 => 'Three', 4 => 'Four', 5 => 'Five', 6 => 'Six', 7 => 'Seven', 8 => 'Eight', 9 => 'Nine', 10 => 'Ten', 11 => 'Eleven', 12 => 'Twelve', 13 => 'Thirteen', 14 => 'Fourteen', 15 => 'Fifteen', 16 => 'Sixteen', 17 => 'Seventeen', 18 => 'Eigthteen', 19 => 'Nineteen', 20 => 'Twenty', 30 => 'Thirty', 40 => 'Forty', 50 => 'Fifty', 60 => 'Sixty', 70 => 'Seventy', 80 => 'Eighty', 90 => 'Ninety', 100 => 'One Hundred', 200 => 'Two Hundred', 300 => 'Three Hundred', 400 => 'Four Hundred', 500 => 'Five Hundred', 600 => 'Six Hundred', 700 => 'Seven Hundred', 800 => 'Eight Hundred', 900 => 'Nine Hundred' ); if($number <= 20) { return $numMap[$number]; } else if ($number > 20 && $number < 100) { return $numMap[substr($number, 0, 1) . 0] . '-' . $numMap[substr($number, 0, 1)]; } else if ($number > 99 && $number <= 999) { if (substr($number, 1, 2) == 00) { return $numMap[substr($number, 0, 1) . 0 . 0]; } elseif (substr($number, 1, 1) == 0) { return $numMap[substr($number, 0, 1) . 0 . 0] . ' and ' . $numMap[substr($number, 2, 1)]; } elseif (substr($number, 1, 2) <= 20){ return $numMap[substr($number, 0, 1) . 0 . 0] . ' and ' . $numMap[substr($number, 1, 2)]; } else { return $numMap[substr($number, 0, 1) . 0 . 0] . ' and ' . $numMap[substr($number, 1, 1) . 0] . '-' .$numMap[substr($number, 2, 1)]; } } else { // add algorithm to deal with big numbers... } } ?>

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