正在尝试为单个帖子创建iCal文件

我有一个单独的研讨会活动页面，我正在创建一个“添加到日历”功能。现在我有一个链接设置，它将查询字符串中的当前帖子ID传递给生成iCal文件的PHP文件。我很确定我应该能够从wp\\u查询中生成这样的文件，但我知道我的代码可能错误得离谱。我整天都在做这件事，似乎找不到其他关于这件事的帖子了。任何帮助都将不胜感激。我是wordpress的新手，所以要温柔！

文件如下：

//allow access to the wp_query method:
$parse_uri = explode( \'wp-content\', $_SERVER[\'SCRIPT_FILENAME\'] );
require_once( $parse_uri[0] . \'wp-blog-header.php\' );

//get the post ID from the incoming query string:
$workshop_id = @$_GET[\'workshop_id\'];

$args = array(
\'p\' => $workshop_id,
\'post_type\' => \'any\');

$the_query = new WP_Query($args);

// The Loop
if ( $the_query->have_posts() ) :

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

$workshop = array(
    \'workshop_title\' => get_field(\'workshop\');
);

header("Content-Type: text/Calendar");
header("Content-Disposition: inline; filename=calendar.ics");
echo "BEGIN:VCALENDAR\\n";
echo "VERSION:2.0\\n";
echo "PRODID:-//Foobar Corporation//NONSGML Foobar//EN\\n";
echo "METHOD:REQUEST\\n"; // requied by Outlook
echo "BEGIN:VEVENT\\n";
echo "UID:".date(\'Ymd\').\'T\'.date(\'His\')."-".rand()."-example.com\\n"; // required by Outlok
echo "DTSTAMP:".date(\'Ymd\').\'T\'.date(\'His\')."\\n"; // required by Outlook
echo "DTSTART:20080413T000000\\n"; 
//  echo "SUMMARY:{$workshop[\'workshop_title\']}\\n";
echo "DESCRIPTION: this is just a test\\n";
echo "END:VEVENT\\n";
echo "END:VCALENDAR\\n";

endwhile;

endif;

?>

if ( ! $id = ( int ) $_GET[\'workshop_id\'] ) return; // Invalid parameter if ( ! $post = get_post( $id ) ) return; // Invalid post if ( ! $title = get_field( \'workshop\', $post->ID /* You can pass a post ID as a second arg to ACF get_field */ ) ) return; // No workshop if ( $post->post_status !== \'publish\' ) return; // Might want to protect access to drafts and the like // Calendar headers echo "SUMMARY:$title\\n";

$UID = date(\'Ymd\').\'T\'.date(\'His\')."-".rand()."-example.com"; $date_stamp = date(\'Ymd\').\'T\'.date(\'His\'); echo "BEGIN:VCALENDAR VERSION:2.0 PRODID:-//Foobar Corporation//NONSGML Foobar//EN BEGIN:VEVENT UID:{$UID} DTSTAMP:{$date_stamp} DTSTART:20080413T000000 DESCRIPTION: this is just a test END:VEVENT END:VCALENDAR";

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