描述中的 ics 内容行验证和 html

Question

好吧，一直在兜圈子，试图将内容放在新的一行或折叠上。我已经尝试了两个验证器并且可以使其有效，但它给了我行长度警告 - https://icalendar.org/validator.html

我不知道如何按照规范中的描述输入 CRLF - https://www.rfc-editor.org/rfc/rfc2445#section-4.1

该验证器告诉我 \n 已过时，但是当我更改为 \r\n 时，它使我的描述无效。- http://severinghaus.org/projects/icv/

我还尝试使用“\n”而不是“\n”进行转义

我已经尝试过DESCRIPTION;ALTREP =“。$ url。”：“。$description。”

我试过 $description = str_replace("\r\n", '\n', $htmlMsg); $description = str_replace("
",'\n',$description); $description = (str_replace(";",";",str_replace(",",',',$description)));

与说明结合使用：“.$description.”

我试过了

$htmlMsg = "Adding event to your schedule does not confirm your reservation.\nVisit http://www.website.com for attendance details."
    $temp = str_replace(array("\r\n"),"\n",$htmlMsg);
    $lines = explode("\n",$temp);
    $new_lines =array();
    foreach($lines as $i => $line)
    {
        if(!empty($line))
        $new_lines[]=trim($line);
    }
    $desc = implode("\r\n ",$new_lines);

目前的PHP：

    $output = "BEGIN:VCALENDAR
    METHOD:PUBLISH
    VERSION:2.0
    PRODID:-//App, Inc.//Calendar//EN
    X-WR-TIMEZONE:America/Los_Angeles
    CALSCALE:GREGORIAN\r\n";
    foreach ($events as $event):
    $numb = $numb+1;$output .=
    "BEGIN:VEVENT
    ORGANIZER;CN=BB:MAILTO:email@gmail.com
    DTSTAMP:" . date(dateToCal) . "
    SUMMARY:" . $event['te']['title'] . "
    UID:" . $numb . $event['te']['id'] . "
    DTSTART:" . gmdate(DATE_ICAL, strtotime($event['te']['sdate'])) . "
    DTEND:" . gmdate(DATE_ICAL, strtotime($event['te']['edate'])) . "
    DESCRIPTION:" . $desc . "
    X-ALT-DESC;FMTTYPE=text/html:" . $desc . "
    LOCATION:" . $event['te']['location'] . " 
    END:VEVENT\r\n";
    endforeach;
    // close calendar
    $output .= "END:VCALENDAR";

除了新行问题之外，我想在描述中添加一个链接。希望解决方案在 Apple Calendar、Google 和 Outlook 中有效且有效。

集成电路输出

BEGIN:VCALENDAR
METHOD:PUBLISH
VERSION:2.0
PRODID:-//App, Inc.//Calendar//EN
X-WR-TIMEZONE:America/Los_Angeles
CALSCALE:GREGORIAN
BEGIN:VEVENT
ORGANIZER;CN=BB:MAILTO:email@gmail.com
DTSTAMP:20180208T150517Z
SUMMARY:Committee Meeting
UID:200893236
DTSTART:20180208T170000Z
DTEND:20180208T180000Z
DESCRIPTION:Adding event to your schedule does not confirm your reservation.\nVisit http://www.website.com for attendance details.
X-ALT-DESC;FMTTYPE=text/html:Adding event to your schedule does not confirm your reservation.\nVisit http://www.website.com for attendance details.
LOCATION:Conference Room 
END:VEVENT
END:VCALENDAR

感谢任何指导！许多论坛在这个主题上已经有 5-8 年历史了，所以希望能有一些最新的东西。

Answer 1

1) 对于 CR LF，使用：

echo chr(13).chr(10);

2）要“折叠”线条，我使用这样的东西：

function ical_split($value) {
/* "fold" any long content lines  See: http://www.ietf.org/rfc/rfc2445.txt, section 4.1 */

  $value = trim($value);
  $lines = array();
  while (strlen($value)>(75)) {
    $line = mb_substr($value, 0, 75);
    $llength = mb_strlen($line);  //  must use mb_strlen with mb_substr otherwise will not work things like  
    $lines[] = $line.chr(13).chr(10).chr(32); /* CRLF and space*/
    $value = mb_substr($value, $llength); /* set value to what's left of the string */
  }

  if (!empty($value)) {
    $lines[] = $value; /* the last line does not need a white space */
  }
  return (implode($lines));
}

3) 描述中的链接。该规范不允许/在描述中使用 html。有些应用程序可以处理它，但许多应用程序可能无法处理。最好的办法是输入原始 URL，并希望接收应用程序将其转换为链接。这里有更多信息：https://icalevents.com/4019-ics-feed- Generation-with-html/