Help understanding include_once function

[nloding]

The topic title doesn't quite illustrate what I mean.  Here's my setup:

 

<?php

//File: includes/page.inc
function getPage($page = null) {
if($page == null) $page = "home";
include_once("$page.php");
}
//End page.inc

//File: index.php
include_once('includes/page.inc');
$db = new DBClass();

getPage();
//End index.php

//File: test.php
include_once('includes/page.inc');
$db = new DBClass();

include_once('home.php');
//End test.php

 

With index.php, the home.php page that is included using the function does NOT have access the $db variable declared right above it.  But if I skip the function call, and just include home.php, home.php DOES have access to $db.

 

If both are calling include_once, why the difference in scope?

[DarkWater]

I always find problems with including pages inside of functions, not sure why though.  I've never really looked into it.  You'd be better off just coding it outside of a function.

[nloding]

I'm using a Page class now that sets my page, so I'm doing this:

 

include_once($page->getPage());

 

It works fine, just not what I wanted my code to look like.  And I'm curious as to why the include works differently.

[PFMaBiSmAd]

Two words - variable scope.

 

This has nothing to do with include().

 

Variables are not available inside of functions unless you pass them into the function as parameters.