问如何在给定的工作日列表中找到最早即将到来的日期？

EN

// 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);

$dates = array(
    new DateTime('next monday'), // magic!
    new DateTime('next wednesday'),
    new DateTime('next friday'),
);

// Seems to work because since PHP 5.2.2 DateTime objects
// can be compared with the < and > operators    
$shippingDate = min($dates);

echo $shippingDate->format('Y-m-d');

$today = date('w');

// These values are from http://www.php.net/manual/en/function.date.php
$shippingDays = array(
    1, // mon
    3, // wed
    5, // fri
);

// Each of these weekdays is how many days into the future?
foreach($shippingDays as &$day) {
    $day = (7 + $day - $today) % 7;
}

// Get the earliest one, but not if it's today
// array_filter is used to remove a possible 0
$daysInFuture = min(array_filter($shippingDays));
$shippingDate = new DateTime('+'.$daysInFuture.' days');
echo $shippingDate->format('Y-m-d');

$timestamp = strtotime('next Monday');
$date      = date('Y-m-d', $timestamp);