PHP syntax for dereferencing function result

Question

Background

In every other programming language I use on a regular basis, it is simple to operate on the return value of a function without declaring

Answer 1

This is too far-fetched, but if you really NEED it to be in one line:

return index0( $foo->getBarArray() );

/* ... */

function index0( $some_array )
{
  return $some_array[0];
}