grabbing a variable from a parent parent file?

[freelance84]

 

Not sure what to search in google here or php manual....

 

 

A variable ($foobar) is set in "fileA.php"

 

FileA includes_once 'FileB.php' which in turn may or may not include_once 'FileC.php' or include_once 'FileD.php.'

 

(

fileA

    |_fileB

              |_fileC

              |_fileD

)

 

My question is, is $foobar going to accessible to all no matter how far down, or is there a limit?

 

 

[AbraCadaver]

Yes it will be available in global scope (not inside of a function or class).

[xyph]

You should always verify that it exists in those included pages before using it though

 

if( isset($foobar) )

[AbraCadaver]

I should have also mentioned that it is always available in the $GLOBALS super global array, though using global vars is normally not the best practice.

[freelance84]

 

Thanks. Just checking really. So in theory a variable set in fileA could still be called on the 1000th sub file.

 

Cheers.

[xyph]

It's theoretically true, but very bad in practice.

 

Imagine trying to debug an unexpected value of a variable set 1000 pages back Keeping in mind that any one of those 1000 pages could have changed the variable as well

[freelance84]

hahaha, yea true.

 

I'm just crossing the t's and dotting the i's as i go along learning all of this.