How to find the calling function?

[harmeet]

Consider following -

function A calls function B
function C also calls function B

From function B how to find which function called it - A or C?

Thanks

[Ajeh]

You could add a paramater to function B and pass one thing from A and one thing from C then know who is who in the zoo ...

[harmeet]

I found this -

var_dump(debug_backtrace());

It gives the entire call stack!

Thanks