Enforce Featured Image is an API to enforce certain post types to be published with a featured image with certain dimensions if specified.
Write an another plugin file, or paste the example below in your theme functions.php
file:
if ( class_exists( 'Enforce_Featured_Image' ) ) {
Enforce_Featured_Image::enforce_on_post_type( 'post', array(
'min_width' => 640,
'min_height' => 300,
'force_on_published_posts' => false,
) );
}
Note: You can use Code Snippets plugin to add the code snippets to your site.
This plugin is based on Force Featured Image plugin by XWP.
Developers can contribute to the source code on the Github Repository.