Patch for ajax call in PHP version 8.2

While investigating the security problem I found that the plugin wasn’t working on our new server in which we migrated our site from PHP version 8.0 to 8.2. The plugin’s use of wp-admin/admin-ajax.php is throwing a 500 error with the message:

Fatal error: Uncaught Error: Cannot use a scalar value as an array in /var/www/vhosts/example.com/httpdocs/wp-content/plugins/favorites/app/Entities/Favorite/FavoritesArrayFormatter.php:73

Fix for PHP version 8.2:

In file: wp-content/plugins/favorites/app/Entities/Favorite/FavoritesArrayFormatter.php

Line 73:

Wrap the line in a if statement:

if (array_key_exists($favorite, $this->formatted_favorites[$site]['posts']) &&
    is_array($this->formatted_favorites[$site]['posts'][$favorite])) {
        $this->formatted_favorites[$site]['posts'][$favorite]['post_id'] = $favorite;
}