How to prevent variables from being used when a file is include() ed

Question

The title is a little confusing, I know. Basically I want to prevent a variable in one file which I include() into another file form being used. Example:

File1.php:

<?php
$foo = "Bar";
?>

File2.php:

<?php
include("File1.php");
echo $foo;
?>

In the above example File2.php will obviously echo "Bar"; however, I want to prevent this from happening while still being able to access any functions inside File1.php. Ideally variables declared outside of functions should not be accessible when the file is included() ed.

Unfortunately I have no other choice than to use this type of code structure. — HittmanA, Oct 11 '16 at 03:10

Rax Weber · Accepted Answer · 2016-10-11T06:29:31.303

2

Use PHP namespaces:

File1.php:

<?php
namespace baz {
    function foo() {
        return "Bar";
    }
}
namespace { // global code
    $x = "XXX";
}
?>

File2.php:

<?php
include("File1.php");
echo $x; // outputs XXX
echo foo(); // Undefined
?>

To access foo you have to use use:

File2.php:

<?php
include("File1.php");
use function baz\foo;
echo foo(); // outputs Bar
?>

edited Oct 11 '16 at 06:29

answered Oct 11 '16 at 03:13

Rax Weber

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Will this still allow functions in the namespace to be called (Im new to using namespaces)? – HittmanA Oct 11 '16 at 03:15
@HittmanA updated my answer. You can read more on the links that I have posted. – Rax Weber Oct 11 '16 at 03:15
@Rex Weber maybe I didn't clarify. If I dont use use (confusing, again I know) will I still be able to call functions without allowing access to variables? – HittmanA Oct 11 '16 at 03:26
Yes. You have to put your functions on the global scope/global namespace, and put your variables in a different namespace. – Rax Weber Oct 11 '16 at 03:32
Ok and can variables in one namespace (in the same file) interacts with other variables (or functions) in another namespace (in the same file, again) – HittmanA Oct 11 '16 at 03:35
Yes, using `use`. :) – Rax Weber Oct 11 '16 at 03:39
1

;P Should have know. Ok thanks again. You have been a huge help! – HittmanA Oct 11 '16 at 03:40

How to prevent variables from being used when a file is include() ed

1 Answers1