When using http to include() or require() a file,
the variables set within are lost when returning
to the calling file. 
Behavior is instead as expected when included or required file is local.

Example:

<?php
 
echo phpversion();
 
echo "<br>try include<br>\n";
$test1 = "foo";
echo "test1 = $test1";
echo "<br>now including change of test1<br>";
include("http://192.168.100.3/includechild.php");
echo "<br>outside: test1 = $test1";
echo "<br>result:  $result";
 
echo "<br>now try require<br>\n";
$test2 = "foo";
echo "test2 = $test2";
echo "<br>now requiring change of test2<br>";
require("http://192.168.100.3/requirechild.php");
echo "<br>outside: test2 = $test2";
?>   

includechild.php:  (and similar to requirechild.php)
-----------------

<?php
$test1 = "bar";
echo "Inside: test1 = $test1";
?>   

Results:
-----------

4.0.5
try include
test1 = foo
now including change of test1
Inside: test1 = bar
outside: test1 = foo

now try require
test2 = foo
now requiring change of test2
Inside: test2 = bar
outside: test2 = foo