krisidmisso

// based on https://gist.github.com/themattharris/1143040

function calc_working_days($from, $to, $normalise = true)
{
    $_from = is_int($from) ? $from : strtotime($from);
    $_to = is_int($to) ? $to : strtotime($to);
    // normalising means partial days are counted as a complete day.
    if ($normalise) {
        $_from = strtotime(date('Y-m-d', $_from));
        $_to = strtotime(date('Y-m-d', $_to));