Collection of Functions to convert a Money Figure to Amount in Words (Currency - Naira and Kobo)

naira-amount-in-words.php

/**
	 * Amount in Words(Naira) Converter - Collection of PHP functions
	 *           to convert a given Number into Naira Amount in Words
	 *
	 */

	function convertNumber($number) {
		list($integer, $fraction) = explode(".", (string)$number);

		$output = "";

		if ($integer{0} == "-") {
			$output = "negative ";
			$integer = ltrim($integer, "-");
		}
		else {
			if ($integer{0} == "+") {
				$output = "positive ";
				$integer = ltrim($integer, "+");
			}
		}

		if ($integer{0} == "0") {
			$output .= "zero";
		}
		else {
			$integer = str_pad($integer, 36, "0", STR_PAD_LEFT);
			$group = rtrim(chunk_split($integer, 3, " "), " ");
			$groups = explode(" ", $group);

			$groups2 = array();
			foreach ($groups as $g) {
				$groups2[] = convertThreeDigit($g{0}, $g{1}, $g{2});
			}

			for ($z = 0; $z < count($groups2); $z++) {
				if ($groups2[$z] != "") {
					$output .= $groups2[$z] . convertGroup(11 - $z) . ($z < 11 && !array_search('', array_slice($groups2, $z + 1, -1)) && $groups2[11] != '' && $groups[11]{0} == '0' ? " and " : ", ");
				}
			}

			$output = rtrim($output, ", ");
		}

		if ($fraction > 0) {
			$output .= " point";
			for ($i = 0; $i < strlen($fraction); $i++) {
				$output .= " " . convertDigit($fraction{$i});
			}
		}

		return $output;
	}

	function convertGroup($index) {
		switch ($index) {
			case 11:
				return " decillion";
			case 10:
				return " nonillion";
			case 9:
				return " octillion";
			case 8:
				return " septillion";
			case 7:
				return " sextillion";
			case 6:
				return " quintrillion";
			case 5:
				return " quadrillion";
			case 4:
				return " trillion";
			case 3:
				return " billion";
			case 2:
				return " million";
			case 1:
				return " thousand";
			case 0:
				return "";
		}
	}

	function convertThreeDigit($digit1, $digit2, $digit3) {
		$buffer = "";

		if ($digit1 == "0" && $digit2 == "0" && $digit3 == "0") {
			return "";
		}

		if ($digit1 != "0") {
			$buffer .= convertDigit($digit1) . " hundred";
			if ($digit2 != "0" || $digit3 != "0") {
				$buffer .= " and ";
			}
		}

		if ($digit2 != "0") {
			$buffer .= convertTwoDigit($digit2, $digit3);
		}
		else {
			if ($digit3 != "0") {
				$buffer .= convertDigit($digit3);
			}
		}

		return $buffer;
	}

	function convertTwoDigit($digit1, $digit2) {
		if ($digit2 == "0") {
			switch ($digit1) {
				case "1":
					return "ten";
				case "2":
					return "twenty";
				case "3":
					return "thirty";
				case "4":
					return "forty";
				case "5":
					return "fifty";
				case "6":
					return "sixty";
				case "7":
					return "seventy";
				case "8":
					return "eighty";
				case "9":
					return "ninety";
			}
		}
		else {
			if ($digit1 == "1") {
				switch ($digit2) {
					case "1":
						return "eleven";
					case "2":
						return "twelve";
					case "3":
						return "thirteen";
					case "4":
						return "fourteen";
					case "5":
						return "fifteen";
					case "6":
						return "sixteen";
					case "7":
						return "seventeen";
					case "8":
						return "eighteen";
					case "9":
						return "nineteen";
				}
			}
			else {
				$temp = convertDigit($digit2);
				switch ($digit1) {
					case "2":
						return "twenty-$temp";
					case "3":
						return "thirty-$temp";
					case "4":
						return "forty-$temp";
					case "5":
						return "fifty-$temp";
					case "6":
						return "sixty-$temp";
					case "7":
						return "seventy-$temp";
					case "8":
						return "eighty-$temp";
					case "9":
						return "ninety-$temp";
				}
			}
		}
	}

	function convertDigit($digit) {
		switch ($digit) {
			case "0":
				return "zero";
			case "1":
				return "one";
			case "2":
				return "two";
			case "3":
				return "three";
			case "4":
				return "four";
			case "5":
				return "five";
			case "6":
				return "six";
			case "7":
				return "seven";
			case "8":
				return "eight";
			case "9":
				return "nine";
		}
	}