Question

I am trying to access a variable defined in parent file from inside the required file, like this:

<<< parent.php >>>

$controller = 'index';
require ('child.php');

<<< child.php >>>

echo $controller;

---

somehow, I am receiving a null output, which means that the variable is not accessible via child.php..
am I doing something wrong here?
if possible, please let me know how I can call the above variable in my child.php file, if above seems to be wrong.

Regards
Nikhil Gupta

Answer 1

Is your variable declared outside a function body? If not, it needs to be.

Also, when calling the variable from your child file, try “initializing” it with the Global keyword before using it…

like

Global $myParentVariable;

…then try printing it. Also, for debugging purposes, set the variable to a constant in your parent file instead of deriving the value in some function. In other words, make sure it’s not a function turning the value to null. (I see you are doing that in the post – but not sure if you modified it for simplicity)