customFunctions.php

<?php
/**
 * Converts integer to Roman.
 *
 * @param int $integer
 *   Integer to be converted to Roman string.
 *
 * @return string
 */
function integerToRoman($integer)
{
    // Convert the integer into an integer (just to make sure).
    $integer = intval($integer);
    $result = '';

    // Create a lookup array that contains all of the Roman numerals.
    $lookup = [
        'M' => 1000,
        'CM' => 900,
        'D' => 500,
        'CD' => 400,
        'C' => 100,
        'XC' => 90,
        'L' => 50,
        'XL' => 40,
        'X' => 10,
        'IX' => 9,
        'V' => 5,
        'IV' => 4,
        'I' => 1
    ];

    foreach ($lookup as $roman => $value) {
        // Determine the number of matches.
        $matches = intval($integer / $value);

        // Add the same number of characters to the string.
        $result .= str_repeat($roman, $matches);

        // Set the integer to be the remainder of the integer and the value.
        $integer = $integer % $value;
    }

    // The Roman numeral should be built, return it.
    return $result;
}


function stringToNumber($string)
{

    $int = (int)filter_var($string, FILTER_SANITIZE_NUMBER_INT);

    return ($int == 0) ? ' ' : $int;
}


?>