When I login to my recently installed SuiteCRM 8 instance, I get a ton of "Undefined array key" errors in my PHP-FPM log coming from templates. Here is an example from a single login. There are ...

PHP's implicit handling of undefined array keys can lead to silent errors where accessing a non-existent key returns nothing rather than throwing an error. This makes debugging difficult.

Is there a PHP function that can compare all 4 arrays, sum the values of duplicate keys and returns an array with all the sums?<BR><BR>Is that well enough explained?