I would like to add one line to a wp core file. Basically on the 'edit.php' page, just right above
I would like to add an php include statement...
The custom-file is located inside a plugin, not a theme... so if I write it inside my plugin function.php, the url will be:
include( plugin_dir_path( __FILE__ ) . '/custom-file.php');
Is there some way I can use to add this one line via a function without having to edit the core file?