Just another base converter for integers to base 36 and back (with an optional shifting)
<?php
use \Webmasters\Utilities\Numbers\BaseConverter;
BaseConverter::setShifting(999);
$base10 = 1;
$base36 = BaseConverter::toBase36($base10); // 'rs'
$base36 = 'rs';
$base36 = BaseConverter::toBase10($base36); // 1