PHP variable scope with nested include returned by function

Question

Thanks in advance for any help. :)
Ok, here's my problem.
Simplified version of the code:
global space with include file

include file where $var is defined and function is called that returns an include statement
include file returned by function and where $var is no longer accessible

Why is $var no longer accessible?

I suspect it has to do with the function or maybe I am missing something else. The function is like so:

function blah() {
return include_once 'filename.php';
}

Pekka · Accepted Answer · 2010-08-14 17:43:12Z

3

Works as designed. Think of the code as if the includes weren't there: You're inside a function, which has its own scope. Global variables are not accessible there.

Your options:

Pass the variable as a reference to blah(&$variable)
Import the variable from global space using global $varname
If you're on PHP 5.3, use the new closure feature
Use a fancy OOP construct like Static classes, Singletons or Dependency Injection (probably overkill)

answered Aug 14, 2010 at 17:43

Pekka

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3 Comments

VolkerK Over a year ago

Or return an array that contains all the values you want to "export".

Karl Over a year ago

thanks guys, I changed the function to just return the file instead of the whole include statement, easy solution - just how I like it :)

Lane Over a year ago

For completeness, some other excellent suggestions (and code samples) are given in answer to this question: stackoverflow.com/questions/4525310/alias-to-include

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