Convert Numbers Into Words

convert_number_to_words.php

<?php
/**
 * DISPLAY NUMBERS
 * 
 * Convert raw numbers into human-readable words.
 *
 * Borrowed (and very much simplified) from:
 * http://www.karlrixon.co.uk/writing/convert-numbers-to-words-with-php/
 * @param  integer $number Raw number.
 * @return string         Number as a word.
 */
function convert_number_to_words($number) {
    
    $dictionary  = 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',
        20  => 'twenty',
        30  => 'thirty',
        40  => 'fourty',
        50  => 'fifty',
        60  => 'sixty',
        70  => 'seventy',
        80  => 'eighty',
        90  => 'ninety',
        100 => 'hundred'
    );

    $string = $dictionary[$number];

    return $string;
}