How to access items from a debug_backtrace()?
===

In this shortened example:

`print_r($foo);`

    Array
    (
        [0] => Array
            (
                [function] => exception_handler
                [class] => LP
                [type] => ::
                [args] => Array
                    (
                        [0] => Exception Object
                            (
                                [trace:Exception:private] => Array
                                    (
                                        [0] => Array
                                            (
                                                [args] => Array
                                                    (
                                                        [0] => 'hello'
                                                        [1] => 'world'
                                                    )
                                            )
    								)
    						)
    				)
    		)
    )	

How do I access the last item which is "hello".


I am lost after `$foo[0]['args'][0]`