The "type_edit_pre" filter is part of a group of dynamic filters. This filter runs in wp-admin when loading a post for editing.
When the 'type_edit_pre' filter is called, it is passed two parameters: the post type and the id of the post to be edited
function filter_function_name( $type, $post_id ) {
// Process content here
return $type;
}
add_filter( 'type_edit_pre', 'filter_function_name', 10, 2 );
Where 'filter_function_name' is the function WordPress should call when filter is run. Note that the filter function must return a string after it is finished processing or the title will be empty.
filter_function_name should be unique function name. It cannot match any other function name already declared.