Round numbers in order to have something more human readable

roundForHumans.php

<?php
 /**
 * Round a number into an human readable number
 *
 * The idea is to converts numbers like 999,999 into something like 0.9M or 999.99K
 * using the scientific notation.
 *
 * @param  $number
 *
 * @return string
 *
 */
function roundForHumans($number)
{
    $number = round($number);
    $numberToArray = explode(',', number_format($number));
    $result = $numberToArray[0] . ((int)$numberToArray[1][0] !== 0 ? '.' . $numberToArray[1][0] : '');
    $result .= ['k', 'm', 'b', 't'][(count($numberToArray) - 1) - 1];

    return $result;
}