Description:
------------
The code below has a class with two properties.  One which is a regular public class property and the other which is accessed through the __get function.  Both are set to "Not Empty".  However, when you call empty() on the one accessed through __get, the empty() function returns TRUE which is incorrect.  The problem can be remedied by first assigning the value of the property to a variable and then calling the empty function on that variable.

Reproduce code:
---------------
<?php
class EmptyTest {
	public $emptyTest1 = "Not Empty";
	protected $properties = array ('emptyTest2' => "Not Empty");
	function __get($key) {
		if (array_key_exists($key, $this->properties)) return $this->properties[$key];
	}
}
$emptyTest = new EmptyTest();
echo "The value of Test 1 is: \"" . $emptyTest->emptyTest1 . "\"<br/>The value of Test 2 is: \"" . $emptyTest->emptyTest2 . "\"<br/>-----------------------------------------------<br/><br/>";
if (empty($emptyTest->emptyTest1)) echo "Test 1 was empty <br/>";
else echo "Test 1 was not empty <br/>";
if (empty($emptyTest->emptyTest2))echo "Test 2 was empty <br/>";
else echo "Test 2 was not empty <br/>";
$test = $emptyTest->emptyTest2;
if (empty($test))echo "Test 2 was empty this time<br/>";
else echo "Test 2 was not empty this time<br/>";
?>

Expected result:
----------------
Both emptyTest1 and emptyTest2, when passed to the empty function, the function should return true.

It could be that calling empty with a property that has had its access overloaded by the __get function is invalid. If this is the case, I would assume empty should at least throw a Warning.

Actual result:
--------------
The output of the above program is...

The value of Test 1 is: "Not Empty"
The value of Test 2 is: "Not Empty"
-----------------------------------------------

Test 1 was not empty
Test 2 was empty
Test 2 was not empty this time