How to get post ID of the current page/post inside a widget?

I’m trying hard to get the post ID of the current post/page inside a widget class but doesn’t work, I know there’s get_the_ID() and some other options but not a single works inside a widget. Here’s my code:

public function widget( $args, $instance ) {


   global $wp_query;

   $thePostID = $wp_query->post->ID;
   echo 'Post ID is:' . $thePostID;

}

The Solutions:

Below are the methods you can try. The first solution is probably the best. Try others if the first one doesn’t work. Senior developers aren’t just copying/pasting – they read the methods carefully & apply them wisely to each case.

Method 1

You can make use of get_queried_object() here, which is a wrapper for $wp_query and returns the whole post metadata.

Here’s a sample code:

$queried_object = get_queried_object();

if ( $queried_object ) {
    $post_id = $queried_object->ID;
    echo $post_id;
}

Method 2

To just get the ID get_queried_object_id()

Of course, too late but may help others who is looking for the same.

Method 3

Try this:

<?php
global $post;
setup_postdata( $post );
echo "Post's ID: " . get_the_ID();
?>

Method 4

 function widget($args, $instance) {
         global $post;
         echo $post->ID;

 }

All methods was sourced from stackoverflow.com or stackexchange.com, is licensed under cc by-sa 2.5, cc by-sa 3.0 and cc by-sa 4.0