WordPress外部/内部动态iCal生成器

时间：2012-06-22 作者：markb

下面是这篇文章：https://stackoverflow.com/q/1463480/1086990 我想知道将其集成到Wordpress中究竟会如何工作。

我有一个自定义的帖子类型设置，到目前为止，我已经尝试使用上述链接代码链接到“ical.php”（并将标题改为the_title() 和GMT版本的日期date(..) 代码）。没有工作，因为它可以找到get_post_custom_values() 这一点很明显，因为它不在WP循环或WP关联文件中。

接下来，我尝试添加headers 进入header.php WP文件，并添加if(is_singular("event")), 但标题会自动下载。如果我可以停止自动下载，那么我就是ace，否则我会来这里寻求帮助！

是否有任何合理的方式可以通过WP和only 单击链接时下载，而不是自动下载？

我会主持所有的活动，但活动太频繁了，制作和主持都是浪费also 是否有像谷歌日历这样的href生成器可以自动工作？

<小时/>

EDIT (My working code):

Custom Taxonomy Loop

<form action="<?php echo get_feed_link(\'calendar-event\'); ?>" method="post">
    <input hidden="hidden" name="eventID" value="<?php the_ID(); ?>">
    <button title="Add to iCal" type="submit" name="iCalForm">iCal</button>
</form>
iCal.php我把这个写进了functions.php 通过arequire().

<?php //Event ICAL feed
class SH_Event_ICAL_Export  {

    public function load() { add_feed(\'calendar-event\', array(__CLASS__,\'export_events\')); }

    // Creates an ICAL file of events in the database
    public function export_events(){ 

        //Give the iCal export a filename
        $filename = urlencode( \'event-ical-\' . date(\'Y-m-d\') . \'.ics\' );

        //Collect output 
        ob_start();

        // File header
        header("Content-Description: File Transfer");
        header("Content-Disposition: attachment; filename=".$filename);
        header("Content-type: text/calendar");
        header("Pragma: 0");
        header("Expires: 0");
?>
BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//<?php echo get_bloginfo(\'name\'); ?> //NONSGML Events //EN
CALSCALE:GREGORIAN
X-WR-CALNAME:<?php echo get_bloginfo(\'name\');?>: Events
<?php // Query for events

    if(isset($_POST[\'iCalForm\'])) {
        $post_ID = $_POST[\'eventID\'];
        $events = new WP_Query(array(
            \'p\' => $post_ID,
            \'post_type\' => \'event\'  //Or whatever the name of your post type is
        ));

    if($events->have_posts()) : while($events->have_posts()) : $events->the_post();
        $uid = get_the_ID(); // Universal unique ID
        $dtstamp = date_i18n(\'Ymd\\THis\\Z\',time(), true); // Date stamp for now.
        $created_date = get_post_time(\'Ymd\\THis\\Z\', true, get_the_ID() ); // Time event created
        // Other pieces of "get_post_custom_values()" that make up for the StartDate, EndDate, EventOrganiser, Location, etc.
        // I also had a DeadlineDate which I included into the BEGIN:VALARM
        // Other notes I found while trying to figure this out was for All-Day events, you just need the date("Ymd"), assuming that Apple iCal is your main focus, and not Outlook, or others which I haven\'t tested :]
?>
BEGIN:VEVENT
CREATED:<?php echo $created_date;?>

UID:<?php echo $uid;?>

DTEND;VALUE=DATE:<?php echo $end_date; ?>

TRANSP:OPAQUE
SUMMARY:<?php echo $organiser; ?>

DTSTART;VALUE=DATE:<?php echo $start_date ; ?>

DTSTAMP:<?php echo $dtstamp;?>

LOCATION:<?php echo $location;?>

ORGANIZER:<?php echo $organiser;?>

URL;VALUE=URI:<?php echo "http://".$url; ?>

BEGIN:VALARM
ACTION:DISPLAY
TRIGGER;VALUE=DATE-TIME:<?php echo $dLine; ?>

DESCRIPTION:Closing submission day of films for <?php echo $organiser; ?>! Enter quickly!
END:VALARM
END:VEVENT
<?php endwhile; endif; } ?>
END:VCALENDAR
<?php //Collect output and echo 
    $eventsical = ob_get_contents();
    ob_end_clean();
    echo $eventsical;
    exit();
    }   

} // end class
SH_Event_ICAL_Export::load();
?>
希望这对任何需要它的人都能起到很好的作用，因为这是一项了不起的工作，所以再次感谢斯蒂芬·哈里斯，他不仅帮助了这个问题，而且没有建议我使用他的插件。

2 个回复
最合适的回答,由SO网友:Stephen Harris 整理而成

我会使用WordPress的订阅源。您可以使用创建自己的提要add_feed. 您指定一个回调，该回调负责显示输出。

创建提要

add_feed(\'my-events\',\'wpse56187_ical_cb\');
wpse56187_ical_cb 负责获取事件（使用WP_Query), 循环浏览并打印ICAL字段。

下载ICAL文件

如果您的订阅源是“我的事件”，则可以通过转到下载ICAL文件：

www.yoursite.com?feed=my-events
www.yoursite.com/feed/my-events //If you have pretty permalinks
可以通过以下方式获得到提要的链接get_feed_link(). 因此，如果您想在模板中创建指向活动提要的链接：

<a href="<?php echo get_feed_link(\'my-events\'); ?>" > Click here for ical file </a>
示例我省略了以ICAL格式填写事件详细信息的细节（如何填写取决于存储细节的方式）。

下面的类实现了上述方法并创建了一个名为“我的事件”的提要。您需要确保详细信息格式正确且有效（请参阅this site)

请注意，我没有测试以下内容，因此可能存在语法错误

<?php
/**
 * Event ICAL feed
 */
class SH_Event_ICAL_Export  {

    public function load(){
        add_feed(\'my-events\', array(__CLASS__,\'export_events\'));
    }

   /**
    * Creates an ICAL file of events in the database
    *  @param string filename - the name of the file to be created
    *  @param string filetype - the type of the file (\'text/calendar\')
    */ 
    public function export_events( ){ 

    //Give the ICAL a filename
    $filename = urlencode( \'event-ical-\' . date(\'Y-m-d\') . \'.ics\' );

    //Collect output 
    ob_start();

    // File header
    header( \'Content-Description: File Transfer\' );
    header( \'Content-Disposition: attachment; filename=\' . $filename );
    header(\'Content-type: text/calendar\');
    header("Pragma: 0");
    header("Expires: 0");
?>
BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//<?php  get_bloginfo(\'name\'); ?>//NONSGML Events //EN
CALSCALE:GREGORIAN
X-WR-CALNAME:<?php echo get_bloginfo(\'name\');?> - Events

<?php
  
    // Query for events
    $events = WP_Query(array(
         \'post_type\'=>\'event\' //Or whatever the name of your post type is
         \'posts_per_page\'=>-1 //Get all events
          ...
    ));

    if( $events->have_posts() ):
        while( $events->have_posts() ): $events->the_post();
            $uid=\'\'; //Universal unique ID
            $dtstamp=date_i18n(\'Ymd\\THis\\Z\',time(), true); //date stamp for now.
            $created_date=get_post_time(\'Ymd\\THis\\Z\', true, get_the_ID() ); //time event created
            $start_date=""//event start date
            $end_date=""//event end date
            $reoccurrence_rule=false//event reoccurrence rule.
            $location=\'\'//event location
            $organiser=\'\'//event organiser
?>
BEGIN:VEVENT
UID:<?php echo $uid;?>

DTSTAMP:<?php echo $dtstamp;?>

CREATED:<?php echo $created_date;?>

DTSTART:<?php echo $start_date ; ?>

DTEND:<?php echo $end_date; ?>

<?php if ($reoccurrence_rule):?>
RRULE:<?php echo $reoccurrence_rule;?>

<?php endif;?>

LOCATION: <?php echo $location;?>

ORGANIZER: <?php $organiser;?>

END:VEVENT
<?php
        endwhile;
    endif;
?>
END:VCALENDAR
<?php

    //Collect output and echo 
    $eventsical = ob_get_contents();
    ob_end_clean();
    echo $eventsical;
    exit();
    }   

} // end class
SH_Event_ICAL_Export::load();

SO网友:The J

与Stephen的版本略有不同。我整合了一些东西，改变了其他东西。

代码经过测试，运行良好，因为我正在项目中使用它。

function add_calendar_feed(){
    add_feed(\'calendar\', \'export_events\');
    // Only uncomment these 2 lines the first time
    /*global $wp_rewrite;
    $wp_rewrite->flush_rules( false );*/
}
add_action(\'init\', \'add_calendar_feed\');

function export_events(){

   // Helper - Get the right time format, use this function or date_i18n(\'Ymd\\THis\\Z\', $yourtimehere, true);
   /*function dateToCal($timestamp) {
       return date(\'Ymd\\THis\\Z\', $timestamp);
   }*/
   // Helper - Escapes a string of characters
   function escapeString($string) {
       return preg_replace(\'/([\\,;])/\',\'\\\\\\$1\', $string);
   }
   // Helper - Cut it
   function shorter_version($string, $lenght) {
        if (strlen($string) >= $lenght) {
            return substr($string, 0, $lenght);
        } else {
            return $string;
        }
   }

    // Query the event
    $the_event = new WP_Query(array(
        \'p\' => $_REQUEST[\'id\'],
        \'post_type\' => \'any\',
    ));

    if($the_event->have_posts()) :

        while($the_event->have_posts()) : $the_event->the_post();

        $timestamp = date_i18n(\'Ymd\\THis\\Z\',time(), true);
        $uid = get_the_ID();
        $created_date = get_post_time(\'Ymd\\THis\\Z\', true, $uid ); // post creation
        $start_date = date_i18n(\'Ymd\\THis\\Z\',time(), true); // EDIT THIS WITH START DATE VALUE
        $end_date = date_i18n(\'Ymd\\THis\\Z\',time(), true); // EDIT THIS WITH END DATE VALUE
        $deadline = date_i18n(\'Ymd\\THis\\Z\',time()-24, true); // deadline in BEGIN:VALARM
        $organiser = get_bloginfo(\'name\'); // YOUR NAME OR SOME VALUE
        $address = \'\'; // EDIT THIS WITH SOME VALUE
        $url = get_the_permalink();
        $summary = get_the_excerpt();
        $content = trim(preg_replace(\'/\\s\\s+/\', \' \', get_the_content())); // removes newlines and double spaces

        //Give the iCal export a filename
        $filename = urlencode( get_the_title().\'-ical-\' . date(\'Y-m-d\') . \'.ics\' );
        $eol = "\\r\\n";

        //Collect output
        ob_start();

        // File header
        header("Content-Description: File Transfer");
        header("Content-Disposition: attachment; filename=".$filename);
        header(\'Content-type: text/calendar; charset=utf-8\');
        header("Pragma: 0");
        header("Expires: 0");
?>
BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//<?php echo get_bloginfo(\'name\'); ?> //NONSGML Events //EN
CALSCALE:GREGORIAN
X-WR-CALNAME:<?php echo get_bloginfo(\'name\');?>
BEGIN:VEVENT
CREATED:<?php echo $created_date.$eol;?>
UID:<?php echo $uid.$eol;?>
DTEND;VALUE=DATE:<?php echo $end_date.$eol; ?>
DTSTART;VALUE=DATE:<?php echo $start_date.$eol; ?>
DTSTAMP:<?php echo $timestamp.$eol; ?>
LOCATION:<?php echo escapeString($address).$eol; ?>
DESCRIPTION:<?php echo shorter_version($content,70).$eol; ?>
SUMMARY:<?php echo escapeString(get_the_title()).$eol; ?>
ORGANIZER:<?php echo escapeString($organiser).$eol;?>
URL;VALUE=URI:<?php echo escapeString($url).$eol; ?>
TRANSP:OPAQUE
BEGIN:VALARM
ACTION:DISPLAY
TRIGGER;VALUE=DATE-TIME:<?php echo $deadline.$eol; ?>
DESCRIPTION:Fine / Scadenza di <?php echo escapeString(get_the_title()); echo $eol; ?>
END:VALARM
END:VEVENT
<?php
        endwhile;
?>
END:VCALENDAR
<?php
        //Collect output and echo
        $eventsical = ob_get_contents();
        ob_end_clean();
        echo $eventsical;
        exit();

    endif;

}
?>
然后在主题中，使用以下链接：

<a href="<?php echo get_feed_link(\'calendar\'); ?>?id=<?php echo get_the_ID(); ?>">Get the ical file </a>
制作了一个GIST 有更多信息。

结束
标签： custom-post-types   calendar   outside-wordpress   小码农  

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