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我正在计算项目中每个任务的暂定截止日期，我计算出第一个任务的截止日期就好了，即项目开始日期后的 5 个工作日，但现在我想根据以前的任务计算每个新任务的截止日期截止日期。

项目开始日期为 7-15-13 任务一的工期为 5 天，应将截止日期设置为 7-22-13 任务二的工期为 5 天，应将截止日期设置为 7-19-13任务三的持续时间为 3 天，这应该将我的截止日期设置为 7-24-13。

每个项目可以有可变数量的任务。

        //Format the Start Date
    $startDate = date("Y-m-d", strtotime($projectStart));

    //Subtract one day to project length to include the starting date in the count.
    $projectLengthMinusOne = ($projectLength - 1);

    //Calculate estimated deadline date based off of out of office, absence, holidays, and weekdays.
    $deadlineDate = date("Y-m-d", strtotime($projectLengthMinusOne . ' weekdays', strtotime($startDate)));

    //Check for holidays
    $checkHolidays = mysql_query("SELECT id FROM fm_calendar_holidays WHERE fromDate BETWEEN '".$startDate."' AND '".$deadlineDate."'") or die("Check Holidays: " . mysql_error());
    $numHolidays = mysql_num_rows($checkHolidays);

    //Check for Absences
    $checkAbsences = mysql_query("SELECT numDays FROM fm_calendar_absenceRequest WHERE startDate BETWEEN '".$startDate."' AND '".$deadlineDate."' and respid = '".$taskData['assignedTo']."'") or die("Check Absences: " . mysql_error());

    if(mysql_num_rows($checkAbsences) > 0)
        {
        $totalAbsences = 0;

        while($abData = mysql_fetch_array($checkAbsences))
            {
            $numDays = $abData['numDays'];
            $totalAbsences += $numDays;
            }
        }

    $numAbsences = $totalAbsences;

    //Check for out of office
    $checkOutOffice = mysql_query("SELECT startDate, endDate FROM fm_calendar_outofOffice WHERE startDate BETWEEN '".$startDate."' AND '".$deadlineDate."' and requesterId = '".$taskData['assignedTo']."'") or die("Check Out of Office: " . mysql_error());

    if(mysql_num_rows($checkOutOffice) > 0)
        {
        $totalOutOffice = 0;

        while($oooData = mysql_fetch_array($checkOutOffice))
            {
            $oooStart = $oooData['startDate'];
            $oooEnd = $oooData['endDate'];

            $numWorkingDays = getWorkingDays($oooStart, $oooEnd);

            $totalOutOffice += $numWorkingDays;
            }
        }

    $numOutOffice = $totalOutOffice;

    //Add up all days off from the calendar
    $totalDaysAdded = ($numHolidays + $numAbsences + $numOutOffice);

    //Recalculate the deadline date based off of the new days off information
    $deadlineDate = date("Y-m-d", strtotime($totalDaysAdded . ' weekdays', strtotime($deadlineDate)));

    $deadlineDate = date("Y-m-d", strtotime($taskData['taskLength'] . ' weekdays', strtotime($deadlineDate)));


    echo '<div class="page_collapsible" id="body-section1">'.$taskData['taskName'] . '<span></span></div>';

    echo '<div class="container">
                <div class="collapseContainer">';

                echo '<table width = "900px" cellspacing = "5" cellpadding = "5" border = "0">
                            <tr>
                                <td width = "125px" align="right"><strong>Description:</strong></td>
                                <td width = "775px" align="left">'.$taskData['taskDescription'] . '</td>
                            </tr>
                            <tr>
                                <td width = "125px" align="right"><strong>Programmer:</strong></td>
                                <td width = "775px" align="left">'.getCkname($taskData['assignedTo']). '</td>
                            </tr>
                            <tr>
                                <td width = "125px" align="right"><strong>Task Status:</strong></td>
                                <td width = "775px" align="left">'.$taskData['taskStatus'] . '</td>
                            </tr>
                            <tr>
                                <td width = "125px" align="right"><strong>Task Duration:</strong></td>
                                <td width = "775px" align="left">'.$taskData['taskLength'] . ' days</td>
                            </tr>
                            <tr>
                                <td width = "125px" align="right"><strong>Tentative Due Date:</strong></td>
                                <td width = "775px" align="left">'.$deadlineDate . '</td>
                            </tr>
                        </table>
                </div>
            </div>';
    }
}
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1 回答 1

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添加日期的正确方法是使用 DateTime::add() 或 date_add 函数，关于如何使用这些函数，您可以在此处查看 PHP 手册：http: //mx1.php.net/manual/function.date -add.php

于 2013-07-15T18:26:09.227 回答