Format bytes to human readable (KB/MB/GB)

formatBytes.php

<?php

/**
 * Put this in bootstrap/helpers.php
 * Add "files" key in composer.json > autoload: "files": ["bootstrap/helpers.php"]
 * @see https://stackoverflow.com/questions/2510434/format-bytes-to-kilobytes-megabytes-gigabytes
 */
function formatBytes(int $bytes, $precision = 2)
{
    $units = ['B', 'KB', 'MB', 'GB', 'TB'];

    $bytes = max($bytes, 0);
    $pow = floor(($bytes ? log($bytes) : 0) / log(1024));
    $pow = min($pow, count($units) - 1);

    // Uncomment one of the following alternatives
    // $bytes /= pow(1024, $pow);
    $bytes /= (1 << (10 * $pow));

    return round($bytes, $precision) . ' ' . $units[$pow];
}