Description:
------------
The backtrace (either from an exception or debug_backtrace) doesn't contain an entry for the class of the object that a method was called on - only the class that the method was defined in.

In the example below, there's even though the call is on a B object, there's no mention of B in the backtrace, which cane make debugging very difficult.

I would suggest adding an extra item to the trace, e.g. "object_class", alongside class.

Test script:
---------------
<?php

class A
{
	protected $val = 0;
	
	public function ex()
	{
		throw new Exception('Value is ' . $this->val);
	}
}

class B extends A
{
	protected $val = 1;
}

try
{
	$b = new B();
	$b->ex();
}
catch (Exception $e)
{
	print '<pre>' . print_r($e->getTrace(), true) . '</pre>';
}


Expected result:
----------------
Array
(
    [0] => Array
        (
            [file] => C:\bug.php
            [line] => 21
            [function] => ex
            [class] => A
            [object_class] => B
            [type] => ->
            [args] => Array
                (
                )

        )

)

Actual result:
--------------
Array
(
    [0] => Array
        (
            [file] => C:\bug.php
            [line] => 21
            [function] => ex
            [class] => A
            [type] => ->
            [args] => Array
                (
                )

        )

)