How to add column into post list in the wordpress dashboard

add new column in post.php

// ADD NEW COLUMN
function suga_columns_head($defaults) {
    $defaults['featured_image'] = 'Post ID';
    return $defaults;
}
// show value in the new column
function suga_columns_content($column_name, $post_ID) {
    if ($column_name == 'featured_image') {
        echo 'Post ID: <strong>'.get_the_ID().'</strong>';
    }
}
add_filter('manage_posts_columns', 'suga_columns_head');
add_action('manage_posts_custom_column', 'suga_columns_content', 10, 2);