Tbanks for your sharing about this practice. In fact, for me, I don't prefer to modify the coding thing, but resort to the WordPress plugin to achieve my goal an easy way. I finally opt Default Featured Image plugin after reading https://wpmatter.com/how-to-set-default-fallback-image-wordpress/. Hope this one can be added into your sharing.
Tbanks for your sharing about this practice. In fact, for me, I don't prefer to modify the coding thing, but resort to the WordPress plugin to achieve my goal an easy way. I finally opt Default Featured Image plugin after reading https://wpmatter.com/how-to-set-default-fallback-image-wordpress/. Hope this one can be added into your sharing.