php - References in function definitions and parameter definitions -

, so I understand how the following should be used:

  function testing (& Amp;; Obj) {{...}}  

But what do the following represent?

  function and test (and $ obj) {{...}}  

Any help would be appreciated.

This announcement:

  function and test (& amp; $ Obj) represents  

function as a parameter in the context of a variable and returns a variable by reference.