Converts bytes to a readable value to nearest unit

human_size.php

<?php

/**
 * Return the $bytes to the nearest unit (1 kB = 1,000 B)
 * eg. human_size(1_000) => "1 kB"
 * eg. human_size(876543210, 1) => "876.5 MB"
 */
function human_size(
  int $bytes, int $precision = 0, int $base = 1_000,
  array $units = ['B', 'kB', 'MB', 'GB', 'TB', 'PB', 'EB', 'ZB', 'YB']
) {
    $factor = floor(log($bytes, $base));

    if (!isset($units[$factor])) {
        return "{$bytes} {$units[0]}";
    }

    return sprintf(
        "%.{$precision}f %s",
        $bytes / pow($base, $factor),
        $units[$factor],
    );
}