PHP - Undefined variable

Question

I\'m doing some exercises from Beginners PHP & MySQL by Mr. Tucker.

On his example everything works fine, but on my PC there is an error:

Answer 1

You should define $passwordRetrieved before using it. This notice does not affect it at all.

To avoid this, define it:

$thisScriptName = "loginForm.php";

$passwordRetrieved;