PHP Foreach on iCal event

任何人都可以看到我的代码出了什么问题吗？

我正在尝试为$ _POST中的每个事件创建一个日历事件。应该有一个日历可供下载，上面有几个事件。

到目前为止，它将生成一个日历文件以供下载，其中仅包含列表中的最后一个事件。它覆盖旧的。

提前感谢任何帮助。

 //Set the headers
 header("Content-Type: text/Calendar");
 header("Content-Disposition: inline; filename=calendar.ics");
 //Loop through $_POST to get all entries
 foreach ($_POST['listItem'] as $value){
$dave = trim($value);
echo "BEGIN:VCALENDAR'n";
echo "VERSION:2.0'n";
echo "PRODID:www.testMeiCalendar.net'n";
echo "METHOD:REQUEST'n"; // requied by Outlook
echo "BEGIN:VEVENT'n";
echo "DTSTART:".$dave."T230000'n";
echo "DTEND:".$dave."T010000'n";
echo "SUMMARY:This is beautiful'n";
echo "LOCATION:Downtown'n";
echo "DESCRIPTION:Let's get together for New Years Eve'n";
echo "UID:ABCD1234'n";
echo "SEQUENCE:0'n";
echo "DTSTAMP:20101125T112600'n";
echo "END:VEVENT'n";
echo "END:VCALENDAR'n";
  }