Display a Featured Image in the Right Sidebar in WordPress

1. Install the Enhanced Text Widget plugin, which lets you use php code in widget areas

2. Code:

PS: Getting the featured image URL on a WordPress post page

Getting a featured image URL in WordPress mainly requires two functions: get_post_thumbnail_id and wp_get_attachment_image_src. Below are the methods for getting image URLs in thumbnail, medium, large, full, and custom sizes

• Get the featured image: thumbnail

ID), 'thumbnail');
echo $thumbnail_image_url[0];
?>

• Get the featured image: medium

ID), 'medium');
echo $medium_image_url[0];
?>

• Get the featured image: large

ID), 'large');
echo $large_image_url[0];
?>

• Get the featured image: full

ID), 'full');
echo $full_image_url[0];
?>

• Get the featured image: custom 100x100

ID), array(100,100));
echo $array_image_url[0];
?>