How to Add post ID to posts and pages admin columns

Check out PHP code snippet which allows you to add ID column to page and post listing pages on the WordPress dashboard.

//Add post ID to posts, pages admin columns

add_filter('manage_posts_columns' , 'custom_set_posts_columns', 5);

add_filter('manage_pages_columns' , 'custom_set_posts_columns', 5);

function custom_set_posts_columns($columns) {

$columns['post_id'] = __('ID');

return $columns;

}

add_action( 'manage_posts_custom_column' , 'custom_set_posts_columns_value', 10, 2 );

add_action( 'manage_pages_custom_column' , 'custom_set_posts_columns_value', 5, 2);

function custom_set_posts_columns_value( $column, $post_id ) {

if ($column == 'post_id'){

echo $post_id;

}

}

add_action('admin_head','custom_admin_styling');

function custom_admin_styling() {

echo '<style type="text/css">';

echo 'th#post_id{width:50px;}';

echo '</style>';

}