过滤事件列表Google日历PHP

我正在尝试使用以下代码段从google日历中获取位于特定用户给定日期之间的事件：

form name="dates" method="post" action="<?php echo $_SERVER['PHP_SELF']; ?>">
  Start: <input type="date" name="start">
  End: <input type="date" name="end">
  <br />
  <input type="submit" name="submit" value="Anzeigen">
</form>

<?php
if(isset($_POST['submit'])) 
{ 
    echo "Dates were chosen: Start " . date($_POST['start']) . ' and End ' . date($_POST['end']);
    // Get the API client and construct the service object.
    $client = getClient();
    $service = new Google_Service_Calendar($client);

    // Print the next 10 events on the user's calendar.
    $calendarId = 'bkrni7gfaiumlahibu0mnifjvk@group.calendar.google.com';
    $optParams = array(
      'maxResults' => 10,
      'orderBy' => 'startTime',
      'singleEvents' => TRUE,
      'timeMin' => date($_POST['start']),
    );
    $results = $service->events->listEvents($calendarId, $optParams);

    if (count($results->getItems()) == 0) {
      print "No upcoming events found.\n";
    } else {
      print "Upcoming events:\n";
      foreach ($results->getItems() as $event) {
        $start = $event->start->dateTime;
        if (empty($start)) {
          $start = $event->start->date;
        }
        printf("%s (%s)\n", $event->getSummary(), $start);
      }
    }
} else {
    echo 'Bitte ein Start- und Enddatum auswählen.';
}
?>

---

为什么它会失败，因为根据timeMin应该是dateTime。

多亏了luc的评论，我发现了这个问题。现在，使用

$timeMin = date($_POST['start']) . "T00:00:00Z";
$timeMax = date($_POST['end']) . "T00:00:00Z";

在对API的调用中

// Print appointments between given start and end date
$calendarId = 'bkrni7gfaiumlahibu0mnifjvk@group.calendar.google.com';
$optParams = array(
  'orderBy' => 'startTime',
  'singleEvents' => TRUE,
  'timeMin' => $timeMin,
  'timeMax' => $timeMax,
);
$results = $service->events->listEvents($calendarId, $optParams);

---

我得到了期望的结果。

您的时间分钟似乎有误：2015-05-31CEST00%3A00它应该根据RFC 3339进行格式化。比如2015-05-29T00:00:00Z非常感谢你。你的评论真的帮我弄明白了（见下面的答案）。

// Print appointments between given start and end date
$calendarId = 'bkrni7gfaiumlahibu0mnifjvk@group.calendar.google.com';
$optParams = array(
  'orderBy' => 'startTime',
  'singleEvents' => TRUE,
  'timeMin' => $timeMin,
  'timeMax' => $timeMax,
);
$results = $service->events->listEvents($calendarId, $optParams);