如何在 Wordpress Admin 中获取帖子 ID [英] How to get Post ID in Wordpress Admin

问题描述

我正在开发一个 Wordpress 插件，我需要获取当前的帖子 ID
在写帖子/写页面编辑屏幕(循环外).

I'm developing a Wordpress plugin and I need to get the current Post ID
in the Write Post / Write Page editing screen (outside the loop).

我还需要在admin_print_scripts"挂钩之前执行此操作，因为我想将一些数据传递给 javascript 文件.

I also need to do it before the "admin_print_scripts" hook, since I would like to pass some data to a javascript file.

我不能使用:

$id = $_GET['post'];

因为当您添加新帖子或页面时，网址不包含此变量.

because the url doesn't include this variable when you are adding a new post or page.

到目前为止，我已经尝试了这些选项，但没有一个奏效:

So far I've tried these options but none of them worked:

A) 这将返回 0 的 ID

A) This returns an ID of 0

function myplugin_setup() {
    global $wp_query;
    $id = $wp_query->get_queried_object_id();
    var_dump($id);
}

add_action('admin_init', 'myplugin_setup' );  

B) 这将返回一个空 ID

B) This returns an ID of null

function myplugin_setup() {
    global $wp_query;
    $id = $wp_query->post->ID;
    var_dump($id);
}

add_action('admin_init', 'myplugin_setup' );

C) 这也返回一个空 ID

C) This also returns an ID of null

function myplugin_setup() {
    global $post;
    $id = $post->ID;
    var_dump($id);
}

add_action('admin_init', 'myplugin_setup' );

推荐答案

确保在 WordPress 查询后调用全局 $post.如果您向 init 或 admin_init 添加操作，则查询尚未就绪，因此您无法从全局 $post 变量中获取任何信息.

Make sure you call the global $post after the WordPress query. If you add an action to init or admin_init, the query isn't ready so there's nothing you can get out of the global $post variable.

我的建议是检查此页面的操作参考:http://codex.wordpress.org/Plugin_API/Action_Reference 并选择适合您的一个.

My advice would be to check the action reference from this page: http://codex.wordpress.org/Plugin_API/Action_Reference and choose one that works for you.

例如，我是这样做的:

add_action( 'admin_head', 'check_page_template' );
function check_page_template() {
    global $post;
    if ( 'page-homepage.php' == get_post_meta( $post->ID, '_wp_page_template', true ) ) {
        // The current page has the foobar template assigned
        // do something

    }
}

并且我能够在 WP admin 中获取页面 ID

And I was able to get the page ID in WP admin

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