Description:
------------


func_get_args() (and probably the related functions) are context sensitive in PHP 7.0 while it was not the case in PHP 5.x.

If you change the content of one of your arguments and then call 

func_get_args(), the change you made is reflected in the results you get, even if those were scalars.

See the results at: https://3v4l.org/Ti8YX

Might be a doc issue if we consider that this behaviour is "normal" but it doesn't look documented and as per issue #30207, we previously emphasized that "func_get_args() returns the arguments *passed* to the function".

Test script:
---------------
<?php

function issueWithArgs($x) {
    $x = 33;
    return func_get_args();
}

var_dump(issueWithArgs(42));

Expected result:
----------------
array(1) {
  [0]=>
  int(42)
}

Actual result:
--------------
array(1) {
  [0]=>
  int(33)
}