PHP constants and variables external variables

Question

Notice: Undefined index: username in G:\phpStudy\WWW\reg.php on line 6


Notice: Undefined index: pwd in G:\phpStudy\WWW\reg.php on line 10

created reg.php and user.html respectively and did not obtain username and password after opening them

Answer 1

First of all, I guess the username variable must be defined in your code. It may be caused by using a variable in a certain function.

You have to declare the global username in the function;

It is recommended to use phpstorm. You will be prompted for such errors

Answer 2

How did you submit your code? The username and password were not obtained, so there is naturally something wrong with the submission method