php - 计算两个日期之间的工作时间

Question

我需要一个 PHP 方法来根据 8 小时工作日计算两个日期之间的工作时间，不包括周末和银行假日。

例如 2012-01-01T08:30:00 和 2012-01-05T10:30:00 之间的工作时间差实际上是 26 个工作小时，因为前两天是周末/银行假期，只剩下 3 个工作日和 2 小时的时差，即 3*8+2=26。

我用过@flamingLogos excellent answer to a previous question但无法将时间和日期考虑在内。

Answer 1

下面的函数计算两个日期之间的工作时间，以文本格式提供，例如“2013-11-27 13:40”，工作时间从 9 点到 17 点(可以更改)。

function get_working_hours($from,$to)
{
    // timestamps
    $from_timestamp = strtotime($from);
    $to_timestamp = strtotime($to);

    // work day seconds
    $workday_start_hour = 9;
    $workday_end_hour = 17;
    $workday_seconds = ($workday_end_hour - $workday_start_hour)*3600;

    // work days beetwen dates, minus 1 day
    $from_date = date('Y-m-d',$from_timestamp);
    $to_date = date('Y-m-d',$to_timestamp);
    $workdays_number = count(get_workdays($from_date,$to_date))-1;
    $workdays_number = $workdays_number<0 ? 0 : $workdays_number;

    // start and end time
    $start_time_in_seconds = date("H",$from_timestamp)*3600+date("i",$from_timestamp)*60;
    $end_time_in_seconds = date("H",$to_timestamp)*3600+date("i",$to_timestamp)*60;

    // final calculations
    $working_hours = ($workdays_number * $workday_seconds + $end_time_in_seconds - $start_time_in_seconds) / 86400 * 24;

    return $working_hours;
}

还有两个附加功能。一个返回工作日数组...

function get_workdays($from,$to) 
{
    // arrays
    $days_array = array();
    $skipdays = array("Saturday", "Sunday");
    $skipdates = get_holidays();

    // other variables
    $i = 0;
    $current = $from;

    if($current == $to) // same dates
    {
        $timestamp = strtotime($from);
        if (!in_array(date("l", $timestamp), $skipdays)&&!in_array(date("Y-m-d", $timestamp), $skipdates)) {
            $days_array[] = date("Y-m-d",$timestamp);
        }
    }
    elseif($current < $to) // different dates
    {
        while ($current < $to) {
            $timestamp = strtotime($from." +".$i." day");
            if (!in_array(date("l", $timestamp), $skipdays)&&!in_array(date("Y-m-d", $timestamp), $skipdates)) {
                $days_array[] = date("Y-m-d",$timestamp);
            }
            $current = date("Y-m-d",$timestamp);
            $i++;
        }
    }

    return $days_array;
}

第二个 - 返回假期数组

function get_holidays() 
{
    // arrays
    $days_array = array();

    // You have to put there your source of holidays and make them as array...
    // For example, database in Codeigniter:
    // $days_array = $this->my_model->get_holidays_array();

    return $days_array;
}