Warnings

I'm trying to use a Windows 10 VM (via Parallels) on my Mac and one of my websites gives these warnings when I open my newsletter php page:

Warning: Undefined array key "IssueMonth" in C:\xampp\htdocs\Leathernecks\includes\incl_newsletter_current.php on line 6
Warning: Undefined variable $GET in C:\xampp\htdocs\Leathernecks\includes\incl_newsletter_current.php on line 7
Warning: Trying to access array offset on value of type null in C:\xampp\htdocs\Leathernecks\includes\incl_newsletter_current.php on line 7

The newsletter page works fine on my Mac's localhost and on my public server. How do I fix this on my VM?

You can turn off warnings and then you won't see the messages and it won't effect your functionality, or you can fix the lines listed in the warnings.

I'd like to have the notice fixed rather than ignored. So what does "undefind array key "IssueMonth" mean? I've checked the MySQL dB, the recordset in DW, the binding, and everything works fine. But I still get this notice... see the screen capture.

I'd have to look at the page and line number in the error to tell you what is wrong.

I'm still getting these notices even after re-installing Dreamweaver CS6, DataBridge 2.35, re-installing the table's SQL, turning off all error-reporting in my php.ini file, and rebuilding both pages in Dreamweaver. See the screen capture and attached webpages.

You must have notices turned on in your local php.ini and not on your live.

The error is because you are referring to url parameters that don't exist when the page first loads. For example on the archive.php page you have:
$rsNewsletter->bindParam("s", "".$_GET['IssueMonth'] ."", "-1xx"); //varIssueMonth
$rsNewsletter->bindParam("s", "".$_GET['IssueYear'] ."", "-1xx"); //varIssueYear

In order to account for situations where the URL parameter doesn't exist, you should use:

$rsNewsletter->bindParam("s", "".(isset($_GET['IssueMonth'])?$_GET['IssueMonth']:"") ."", "-1xx"); //varIssueMonth
$rsNewsletter->bindParam("s", "".(isset($_GET['IssueYear'])?$_GET['IssueYear']:"") ."", "-1xx"); //varIssueYear

Turning off Notices in your php.ini would accomplish the same result since the value would be ignored.