A collection of unfinished code from rabbit holes I NEARLY went down but managed to save myself from... But maybe I'll finish them one day.

bytesToHuman.php

<?php

/**
 * Converts a number of bytes to a human readable string
 *
 * Example:
 * <code>
 * $config->bytesToHuman(10);              // 10 b
 * $config->bytesToHuman(1000);            // 1 kB
 * $config->bytesToHuman(1024, 'iec');     // 1 KiB
 * $config->bytesToHuman(10000);           // 10 kB
 * $config->bytesToHuman(10240);           // 10 KiB
 * $config->bytesToHuman(1000000);         // 1 MB
 * $config->bytesToHuman(1048576, 'iec');  // 1 MiB
 * </code>
 *
 * @param number $value
 * @param string $unitSystem SI or IEC
 * 
 * @return string
 */
function bytesToHUman($value, $unitSystem = 'SI') {
    if (strtoupper($unitSystem) === 'IEC') {
        $step = 1024; // 2^10
        $units = ['b', 'KiB', 'MiB', 'GiB', 'TiB', 'PiB', 'EiB'];
    } else if (strtoupper($unitSystem) === 'SI') {
        $step = 1000; // 10^3
        $units = ['b', 'kB', 'MB', 'GB', 'TB', 'PB', 'EB'];
    } else {
        return $value;
    }

    // Magic math here to return value
}