有没有一种方法可以检测excel文件是在windows或mac上使用PHPExcel生成的


Is there a way to detect if an excel file was generated on windows or mac using PHPExcel?

我正在使用PHPExcel生成一个xls模板,用户可以下载该模板并用他想要的数据填充它。众所周知,excel以数字格式保存日期。我使用这个函数来转换数据并返回时间戳:

public static function excelToTimestamp($excelDateTime, $isMacExcel=false) {
    $myExcelBaseDate = $isMacExcel ? 24107 : 25569; // 1st jan 1904 or 1st jan 1900
    if (!$isMacExcel && $excelDateTime < 60) {
        //  Adjust for the spurious 29-Feb-1900 (Day 60)
        --$myExcelBaseDate;
    }
    // Perform conversion
    if ($excelDateTime >= 1) {
        $timestampDays = $excelDateTime - $myExcelBaseDate;
        $timestamp = round($timestampDays * 86400);
        if (($timestamp <= PHP_INT_MAX) && ($timestamp >= -PHP_INT_MAX)) {
            $timestamp = intval($timestamp);
        }
    } else {
        $hours = round($excelDateTime * 24);
        $mins = round($excelDateTime * 1440) - round($hours * 60);
        $secs = round($excelDateTime * 86400) - round($hours * 3600) - round($mins * 60);
        $timestamp = (integer) gmmktime($hours, $mins, $secs);
    }
    return $timestamp;
}

问题是,我必须检测用户导入系统的文件是使用excel for mac还是windows填写的,这样我才能正确设置日期(mac使用1904日历,而windows使用1900)。

我想知道是否有办法使用PHPExcel来检测它。如果没有,我可以让用户用单选按钮通知它,也许

正如@markBaker所建议的,我刚刚使用PHPExcel函数来转换日期和时间,从而解决了这个问题:

 foreach ($rowLine as $header => $col) {
        if ($header == self::COLUMN_DATE) {
            //transform the excel date value into a datetime object
            $date = PHPExcel_Shared_Date::ExcelToPHPObject($sheetData[$row][$col]);
            $rowLine[$header] = $date->format('m/d/Y');
        }else if ($header == self::COLUMN_HOUR) {
            //transform the excel time value into a datetime object
            $time = PHPExcel_Shared_Date::ExcelToPHPObject($sheetData[$row][$col]);
            $rowLine[$header] = $time->format('H:i');
        }else{
            $rowLine[$header] = $sheetData[$row][$col];
        }
 }