Integrate Membership Card with Invite Only Member Add On [Paid Memberships Pro]

qr-code-invite-members.php

<?php
/**
 * Set the QR code to link to a checkout with an invite code when someone scans a Q.
 * Add this code to your site by following this guide - https://www.paidmembershipspro.com/create-a-plugin-for-pmpro-customizations/
 */

function my_pmpro_membership_card_qr_invite_code( $card_user, $option ) {
	global $pmproio_invite_required_levels;
	if ( $option == 'other' ) {
    
		$codes = get_user_meta($card_user->ID, 'pmpro_invite_code', true);
    
    if ( ! $codes ) {
      return ''; //Change this to return default value for members that don't have invite codes.
    }
    
		$code = '';
		if ( is_array( $codes ) ) {
			$code = $codes[0];
		} else {
			$code = $codes;
		}

		// Default checkout ID if no required_levels is found.
		$checkout_id = 1;
    
		if ( is_array( $pmproio_invite_required_levels ) && ! empty( $pmproio_invite_required_levels[0]) ) {
			$checkout_id = $pmproio_invite_required_levels[0];
		}
		
		return pmpro_url( 'checkout', '?level=' . $checkout_id . '&invite_code=' . $code, "https" );
	}
}
add_filter( 'pmpro_membership_card_qr_data_other', 'my_pmpro_membership_card_qr_invite_code', 10, 2 );