get the current page id inside wordpress plugin page

I need to get the current page id in WordPress plugin page outside the loop. And the code I wrote for getting current page id is in my plugin page. I tried many codes, but doesn’t work

$page_object = get_queried_object();
$page_id     = get_queried_object_id();


 // "Dirty" pre 3.1
 global $wp_query;

$page_object = $wp_query->get_queried_object();
$page_id     = $wp_query->get_queried_object_id();

But it doesn’t work for me .

  global $post;
  echo "pageid: ".$post->ID;

This is also not working.

When I try

     global $wp_query;
     $post_obj = $wp_query->get_queried_object();
     $Page_ID = $post_obj->ID;
     echo $Page_ID;

Then a error message appears

Fatal error: Call to a member function get_queried_object() on a non-object in H:xampphtdocswordpresswp-contentpluginswpkwpk.php on line 876

When I print:

global $wp_query;
print_r($wp_query);

then result is:

WP_Query Object
(
    [query] => 
    [query_vars] => Array
        (
        )

    [tax_query] => 
    [meta_query] => 
    [date_query] => 
    [queried_object] => 
    [queried_object_id] => 
    [request] => 
    [posts] => 
    [post_count] => 0
    [current_post] => -1
    [in_the_loop] => 
    [post] => 
    [comments] => 
    [comment_count] => 0
    [current_comment] => -1
    [comment] => 
    [found_posts] => 0
    [max_num_pages] => 0
    [max_num_comment_pages] => 0
    [is_single] => 
    [is_preview] => 
    [is_page] => 
    [is_archive] => 
    [is_date] => 
    [is_year] => 
    [is_month] => 
    [is_day] => 
    [is_time] => 
    [is_author] => 
    [is_category] => 
    [is_tag] => 
    [is_tax] => 
    [is_search] => 
    [is_feed] => 
    [is_comment_feed] => 
    [is_trackback] => 
    [is_home] => 
    [is_404] => 
    [is_comments_popup] => 
    [is_paged] => 
    [is_admin] => 
    [is_attachment] => 
    [is_singular] => 
    [is_robots] => 
    [is_posts_page] => 
    [is_post_type_archive] => 
    [query_vars_hash] => 
    [query_vars_changed] => 1
    [thumbnails_cached] => 
    [stopwords:WP_Query:private] => 
)

I don’t know how to solve this, how to get the current page id.If you know how to solve this, then I need your support. Thanks in advance.

Answer

get_the_ID(); or $post->ID; returns the current page or post id in WordPress.

But you need to ensure that your post is saved in wordpress post table. Other wise you can’t get the id , simply because of it is not an entry in wordpress database.

If it is a static page and it’s not an entry in wordpress post then, get_the_ID() didn’t return anything.

For example : get_the_ID() didn’t go to work in post archive pages , administration pages in wordpress backend etc.

So as per this question you are trying to get the id of the page that is a backend plugin setting page or any archive page .

UPDATE

Method to get the current post id in wordpress

(1) global $post; $post->ID();

(2) global $wp_query; $post_id = $wp_query->get_queried_object_id();

(3) global $wp_query; $post_id = $wp_query->post->ID;

(4) get_the_ID();

[ It is recommended that this tag must be within The Loop. ]

see this

      function get_the_ID() {
               $post = get_post();
               return ! empty( $post ) ? $post->ID : false;
                }

ie get_the_ID() return the id of current $post .

(5) get_query_var('page_id')

[ it will not going to work if we use pretty permalink ]
https://codex.wordpress.org/Function_Reference/get_query_var