WordPress allows you to edit your plugin and theme files directly through its admin panel. Although, this is dangerous because a single typo can render your website blank. Moreover, you may want to give admin access to people that don’t need to edit the code.
All you need to do is to disable the Theme Editor and the Plugin Editor. To do that, open your wp-config.php file and add the following code to it:
define( 'DISALLOW_FILE_EDIT', true ); define( 'DISALLOW_FILE_MODS', true );
This is all you need to do to disable those editors from the WordPress backend.