TypeError: array_key_exists(): Argument #2 ($array) must be of type array, null given

[jessewaitz]

I am getting multiple errors in the "give-core" plugin (full error stack below). Here is the file where this is happening. Look for the the function renameKeys() (around line 21).

/wp-content/plugins/give/src/Helpers/ArrayDataSet.php

The problem is being caused because sometimes the $array var is empty, so need to make sure that the array is not empty before running the array_key_exists function. My suggestion is to add the follow code to the top of the function, right above the for loop (around line 23).

// FIX: Need to make sure that the array is not empty, to prevent errors on the array_key_exists function.
if ( empty( $array ) ) { return $array; }

Here is the full error stack:

TypeError: array_key_exists(): Argument #2 ($array) must be of type array, null given
#11 /var/www/html/give_usd/public/wp-content/plugins/give/src/Helpers/ArrayDataSet.php(25): array_key_exists
#10 /var/www/html/give_usd/public/wp-content/plugins/give/src/Helpers/ArrayDataSet.php(25): Give\Helpers\ArrayDataSet::renameKeys
#9 /var/www/html/give_usd/public/wp-content/plugins/give/src/Session/SessionDonation/SessionObjects/Donation.php(148): Give\Session\SessionDonation\SessionObjects\Donation::renameKeyInDonorInfo
#8 /var/www/html/give_usd/public/wp-content/plugins/give/src/Session/SessionDonation/SessionObjects/Donation.php(116): Give\Session\SessionDonation\SessionObjects\Donation::fromArray
#7 /var/www/html/give_usd/public/wp-content/plugins/give/src/Session/SessionDonation/DonationAccessor.php(83): Give\Session\SessionDonation\DonationAccessor::convertToObject
#6 /var/www/html/give_usd/public/wp-content/plugins/give/src/Session/Accessor.php(89): Give\Session\Accessor::get
#5 /var/www/html/give_usd/public/wp-content/plugins/give/src/Session/Accessor.php(47): Give\Session\Accessor::__construct
#4 /var/www/html/give_usd/public/wp-content/plugins/give/src/Form/LoadTemplate.php(146): Give\Form\LoadTemplate::handleReceiptAjax
#3 /var/www/html/give_usd/public/wp-includes/class-wp-hook.php(324): WP_Hook::apply_filters
#2 /var/www/html/give_usd/public/wp-includes/class-wp-hook.php(348): WP_Hook::do_action
#1 /var/www/html/give_usd/public/wp-includes/plugin.php(517): do_action
#0 /admin-ajax.php(207): null

[alaca]

@jessewaitz, thank you for reporting this. It should be resolved in the following releases. Here is the PR #7877