Installation

1. Upload force-featured-image to the /wp-content/plugins/ directory
2. Activate the plugin through the ‘Plugins’ menu in WordPress

3. This plugin lets you specify which post-type requires to force a featured image to. It will also let you specify minimum dimensions for the image. Let’s say, for example, you want to force a user to set an image on the default post type with the following dimensions (400px * 400px). Put this code in the function.php of your theme :

   function theme_force_featured_image( $options ){
    $options['post'] = array(
    'width' => 400,
    'height' => 400,
    );
   
    return $options;
   }
   add_filter( 'force_featured_image_post_type', 'theme_force_featured_image' );