round_up_to_next_five.php

<?php

/**
 * * Problem Statement:
 * * passing a floating point number to a function, the function will round the number to 
 * * the nearest point five and return the result.
 *
 *  * Example:
 *  * roundUpToNextFive(3.7) // returns 4.0
 *  * roundUpToNextFive(3.3) // returns 3.5
 *  * roundUpToNextFive(3.8) // returns 4.0
 *  * roundUpToNextFive(1.2) // returns 1.5
 */


/**
 * Rounds the given number up to the next five.
 *
 * @param float $number
 * @return float
 */
function roundUpToNextFive(float $number)
{
    printf("The number is %.2f \n", $number);
    $decimalPart = $number - floor($number);

    return ($decimalPart > 0.50 ? ceil($decimalPart) : (ceil($decimalPart) / 2)) + floor($number);
}

printf("The next closest five is %.2f \n", roundUpToNextFive(5.33));