For TwoCheckout only. Modifies the entire query string passed to the TwoCheckout checkout URL.

apply_filters( 'pmpro_twocheckout_ptpstr', string $ptpStr, MemberOrder $order );

Parameters

$ptpStr

string

$order

MemberOrder

Source

File: https://github.com/strangerstudios/paid-memberships-pro/blob/master/classes/gateways/class.pmprogateway_twocheckout.php