Generating Order Numbers in PHP

ECSHOP (version 3.6.0) order number generation function: Located in /includes/lib_order.PHP, the function get_order_sn().

function get_order_sn()
{
    /* Choose a random scheme */
    mt_srand((double) microtime() * 1000000);

    return date('Ymd') . str_pad(mt_rand(1, 99999), 5, '0', STR_PAD_LEFT);
}