Question

Dates in PHP are a nightmare for me so please help me out fellow coders… I want to notify customers about the day their order will be delivered. It works like this:

I have 2 shipping zones, A & B. Orders for zone A are delivered each Monday, Wednesday & Friday, whereas zone B is on Tuesday, Thursday, Saturday. For each order, the delivery day is scheduled for the NEXT AVAILABLE day, depending on the zone. Please consider that if someone places an order on Monday the goods will be delivered on the NEXT available date, that would be Tuesday for zone B and Wednesday for zone A.

How can I calculate the NEXT AVAILABLE delivery date and notify the customer?

Thanks.

Answer 1

Try this:

// Info
$date = array(date("d"), date("m"), date("Y"));
$zone = "A";
// ------

$zones = array("A" => array(1 => "Monday",    
                            3 => "Wednesday", 
                            5 => "Friday")     

              ,"B" => array(2 => "Tuesday",    
                            4 => "Thursday",   
                            6 => "Saturday")); 

$found = false;
$days_plus = 1; // always next day

// Retrieve last day from the zone
end($zones[$zone]);
$last_day = key($zones[$zone]);

do {
    $mk = mktime(0, 0, 0, $date[1], ($date[0] + $days_plus), $date[2]);
    $week = date("w", $mk);

    // if week not passed last day of zone
    if ($week <= $last_day)
    {
        if (!isset($zones[$zone][$week]))
        {
            $days_plus++;
        }
        else
        {
            $found = true;
        }
    }
    else
    {
        $days_plus++;
    }
} while (!$found);

echo "Next date: " . date("d/m/Y - l", $mk);