We use echo or print_r to get value of variables while debugging PHP code.
But, object of DOMXPath or DOMDocument are not captured in echo or print_r.
How to get values from above objects while debugging PHP code?
This is a bug:
For some reason, DOM* classes do not expose their properties, neither to Reflection, nor to any other function capable of inspecting objects. You'd have to write a custom inspector that collects the properties manually.