创建帖子时，我需要自动生成帖子的PDF版本。问题是，除了post ID之外，global$post对象大部分是空的。我需要获取新创建的post的slug，因为PDF文件的名称需要与页面的slug匹配。

add_action( \'save_post\', \'my_save_post\' );
function my_save_post($post_id) {
    global $post;

    if ( defined( \'DOING_AUTOSAVE\' ) && DOING_AUTOSAVE ) return;

    $pdf = new PDF();
    $pdf->createPDF( $post );

    // Debug
    print_r( $post );
    die();
}

如果发布新帖子，然后返回并更新帖子，$post变量包含所有正确的数据，但如果是新帖子，则对象为空。我也试过edit_post 和post_updated 钩子，但在任何情况下，slug和大多数其他数据都不存在于$post变量中。

*更新的挂钩和结果print_r($post):

add_action( \'save_post\', \'my_save_post\', 10, 3 );
function my_save_post( $post_id, $post, $update ) {
    if ( defined( \'DOING_AUTOSAVE\' ) && DOING_AUTOSAVE ) return;
    if ( \'auto-draft\' === $post->post_status ) return;

    $pdf = new PDF();
    $pdf->createPDF( $post );

    // Debug
    print_r( $post );
    die();
}

下面是print_r:

WP_Post Object
(
    [ID] => 593
    [post_author] => 1
    [post_date] => 2017-11-20 18:29:36
    [post_date_gmt] => 2017-11-20 18:29:36
    [post_content] => 
    [post_title] => 
    [post_excerpt] => 
    [post_status] => publish
    [comment_status] => closed
    [ping_status] => closed
    [post_password] => 
    [post_name] => 593
    [to_ping] => 
    [pinged] => 
    [post_modified] => 2017-11-20 18:29:36
    [post_modified_gmt] => 2017-11-20 18:29:36
    [post_content_filtered] => 
    [post_parent] => 0
    [guid] => http://localhost:8888/testsite/?post_type=publication&p=593
    [menu_order] => 0
    [post_type] => publication
    [post_mime_type] => 
    [comment_count] => 0
    [filter] => raw
)

add_action( \'save_post\', \'my_save_post\', 10, 3 );
function my_save_post( $post_id, $post, $update ) {
    if ( defined( \'DOING_AUTOSAVE\' ) && DOING_AUTOSAVE ) return;
    if( \'auto-draft\' === $post->post_status ) return;
    $pdf = new PDF();
    $pdf->createPDF( $post );
}