Php 8.x support – fix init.gravityform.php

Please update lines 476, 477, and 528, 529 so that the following PHP warning is not triggered:

“Trying to access array offset on value of type null in …/plugins/hitsteps-visitor-manager/init.gravityform.php”

Please see this discussion for an explanation of the issue:

https://stackoverflow.com/questions/59336951/message-trying-to-access-array-offset-on-value-of-type-null

The parent array $_hs_uid_data_cache needs to validated (in addition to the actual value of the array that is already checked with !isset($_hs_uid_data_cache[round($_POST['_hs_uid_data'])])) )

This happens because $cOTLdata is null. Previous versions of PHP may have been less strict on such mistakes and silently swallowed the error / notice while 7.4 does not do this anymore.

To check whether $cOTLdata is null use is_null():

is_null($cOTLdata)

Which means the line should look something like this:

$len = is_null($cOTLdata) ? 0 : count($cOTLdata['char_data']);

However, in case both $cOTLdata and $cOTLdata['char_data'] could not exist, you can use isset() for both at once:

$len = !isset($cOTLdata['char_data']) ? 0 : count($cOTLdata['char_data']);

https://stackoverflow.com/questions/59336951/message-trying-to-access-array-offset-on-value-of-type-null