Filter to adjust the default filename for the orders export from the Membership > Orders > Export to CSV page in the WordPress admin.

apply_filters( 'pmpro_orders_csv_export_filename', $filename );

Parameters

$filename

string; Adjusted filename for the Orders CSV export (default ‘orders.csv’)

Source

File: https://github.com/strangerstudios/paid-memberships-pro/blob/master/adminpages/orders-csv.php