php - 在 wordpress 中显示同一帖子 ID 的所有帖子元键和元值

Question

我正在尝试显示帖子元值和帖子元键，如果只显示一个值，我可以使用简单的函数 get_post_meta() 但我现在需要的是发布所有具有相同 post_id 的帖子元数据.我尝试使用 foreach 循环但没有显示。你能检查我的代码吗？

function wpt_calendar_display()
{
    global $post;

    $columns = array(
        'date_event' => 'Date',
        'name_event' => 'Event'
    );
    register_column_headers('list-header_events', $columns);

    $event_name = get_post_meta( $post->ID, '_event_name' );
   // $event_date = get_post_meta( $post->ID, '_event_date', false );

    $return .= "<table class=\"widefat\">";
    $return .= "<tr>";
    $return .= print_column_headers('list-header_events');
    $return .= "</tr>";
    $return .= "<tr>";

    if (!empty($event_name))
    foreach($event_name as $e_name)
    {
        $return .= "<td>";
        $return .= $e_name;
        $return .="</td>";

    }

    $return .= "<td>";

    $return .= "</td>";
    $return .= "</tr>";
    $return .= "</table>";
    return $return;
}

Answer 1

Default Usage

Get the meta for all keys:

<?php $meta = get_post_meta($post_id); ?>

Get the meta for a single key:

<?php $key_1_values = get_post_meta( 76, 'key_1' ); ?>

例如:

$myvals = get_post_meta($post_id);

foreach($myvals as $key=>$val)
{
    echo $key . ' : ' . $val[0] . '<br/>';
}

Note: some unwanted meta keys starting with "underscore(_)" will also come, so you will need to filter them out.

引用:See Codex