如何从debug_backtrace（）访问项目？

Question

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]

Answer 1

[0] => Exception Object
(
    [trace:Exception:private] => Array
    (
        [0] => Array
        (
            [args] => Array
            (
                [0] => 'hello'
                [1] => 'world'
            )
        )
    )
)

It's an object of type Exception and the values are within a (private) property named trace, thus I guess it's Exception::getTrace()

$trace = $foo[0]['args'][0]->getTrace();
echo end($trace[0]['args']);

... Just realize: You said "last item", but also you said "hello", so know I don't know, what you want. However, $trace[0]['args'] is a regular array and you should be able do with it, whatever you like :) end() gives you the last item.