Set the item number that's sent to PayPal using PayPal Express. Requires Event Espresso 4.9.26.p

paypal_express_item_number.php

<?php
//* Please do NOT include the opening php tag, except of course if you're starting with a blank file

add_filter( 
  'FHEE__EEG_Paypal_Express__set_redirection_info__arguments', 
  'express_ee_add_paypal_item_id' 
);
function express_ee_add_paypal_item_id( $token_request_dtls ) {
    
  $checkout = EE_Registry::instance()->SSN->checkout();
  if ( $checkout instanceof EE_Checkout ) {
    $token_request_dtls['L_PAYMENTREQUEST_0_NUMBER0'] = '7777';
  }

  return $token_request_dtls; 
}