gspice

<?php

/**
 * Send admin notification to a different email address
 */
function affwp_custom_registration_admin_email( $email ) {
  // add the email here
  $email = '[email protected]';

  return $email;

gspice

<?php
// Adds a hidden field to the form that stores the URL
add_action('givewp_donation_form_schema', static function (Give\Framework\FieldsAPI\DonationForm $form) {
    $field = Give\Framework\FieldsAPI\Hidden::make('referralUrl')
            ->defaultValue($_SERVER['HTTP_REFERER'])
            ->emailTag('referralUrl');
    $form->insertAfter('email', $field);
});
// (Optional) Use this email tag in the email templates {meta_donation_referralUrl}

gspice

<?php
add_action('givewp_donation_form_schema', function($form) {
    $comment = $form->getNodeByName('comment');
    // if the comment field is not found, return
    if (!$comment) {
        return;
    }

    // require field
    $comment->required(true);

gspice

<?php
add_action('givewp_donation_form_schema', function($form) {
	//Get field by name attribute
    $field = $form->getNodeByName('field_name_here');
    // if the field is not found, return
    if (!$field) {
        return;
    }

    // get the current default value

gspice

<?php

add_filter( 'give_gift_aid_export_get_data', static function($data) {
  foreach($data as $key => $datakey){
    $first_name = give_get_payment_meta($datakey['gift_aid_donation_id'], '_give_donor_billing_first_name', true);
    $last_name = give_get_payment_meta($datakey['gift_aid_donation_id'], '_give_donor_billing_last_name', true);
    $data[$key]['gift_aid_first_name'] = $first_name;
    $data[$key]['gift_aid_last_name'] = $last_name;
  }
  return $data;