Here is how you can enable the Classic Editor on WordPress using Custom code. All you have to do is add the codes to the Theme functions.

For that, log in to your WordPress dashboard and go to Appearance and then to Theme File Editor. Click on functions.php, scroll down, and add the custom code. After that, the default WordPress editor will be changed to the Classic Editor.

Alternatively, instead of using theme functions, you can also create your own plugin or use our plugin. If you wish to use our plugin, search for “ideasToCode” and find the Duplicate Pages or Posts plugin. Install and activate the plugin, and then go to its Settings. You will find options for duplicating pages and posts, disabling revisions, and enabling the classic editor. Turn on the Classic Editor to use the old classic editor on WordPress. If you disable this option on the plugin, it will revert back to the default editor.

Thank you a lot!