numberToWords.php

<?php
// credits to various authors 
// https://www.studentstutorial.com/

namespace numberToWords;

class NumberToWords
{
    static   function numberTowords($num)
    {

        $ones = array(
            0 => "ZERO",
            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",
            "014" => "FOURTEEN"
        );
        $tens = array(
            0 => "ZERO",
            1 => "TEN",
            2 => "TWENTY",
            3 => "THIRTY",
            4 => "FORTY",
            5 => "FIFTY",
            6 => "SIXTY",
            7 => "SEVENTY",
            8 => "EIGHTY",
            9 => "NINETY"
        );
        $hundreds = array(
            "HUNDRED",
            "THOUSAND",
            "MILLION",
            "BILLION",
            "TRILLION",
            "QUARDRILLION"
        ); /*limit t quadrillion */
        $num = number_format($num, 2, ".", ",");
        $num_arr = explode(".", $num);
        $wholenum = $num_arr[0];
        $decnum = $num_arr[1];
        $whole_arr = array_reverse(explode(",", $wholenum));
        krsort($whole_arr, 1);
        $rettxt = "";
        foreach ($whole_arr as $key => $i) {

            while (substr($i, 0, 1) == "0")
                $i = substr($i, 1, 5);
            if ($i < 20) {
                /* echo "getting:".$i; */
                $rettxt .= $ones[$i];
            } elseif ($i < 100) {
                if (substr($i, 0, 1) != "0")  $rettxt .= $tens[substr($i, 0, 1)];
                if (substr($i, 1, 1) != "0") $rettxt .= " " . $ones[substr($i, 1, 1)];
            } else {
                if (substr($i, 0, 1) != "0") $rettxt .= $ones[substr($i, 0, 1)] . " " . $hundreds[0];
                if (substr($i, 1, 1) != "0") $rettxt .= " " . $tens[substr($i, 1, 1)];
                if (substr($i, 2, 1) != "0") $rettxt .= " " . $ones[substr($i, 2, 1)];
            }
            if ($key > 0) {
                $rettxt .= " " . $hundreds[$key] . " ";
            }
        }
        if ($decnum > 0) {
            $rettxt .= " and ";
            if ($decnum < 20) {
                $rettxt .= $ones[$decnum];
            } elseif ($decnum < 100) {
                $rettxt .= $tens[substr($decnum, 0, 1)];
                $rettxt .= " " . $ones[substr($decnum, 1, 1)];
            }
        }
        return $rettxt;
    }
}