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Subject: Re: [PHP-DEV] Array dereferencing of scalars
From: cmbecker69@gmx.de (Christoph Becker)

Matt Wilmas wrote:

> Forgetting the NULL case for a sec...  With:
> 
> $v = [];
> $v[0][1][2][3][4][5][6][7][8][9];
> 
> How/why are we going from 1 Notice to 10?!
> 
> With:
> 
> unset($v);
> $v[0];
> 
> Why from 1 Notice about the undefined variable, to 2?  That's totally
> new, and it really doesn't make sense to make any more noise after
> you've already been told about the variable.  (Same after the first
> undefined array offset, too, but this makes the point more obvious.)
> 
> That's why I'm saying, you can only really change it for non-NULL
> scalars that have an actual value, to keep this other stuff the same,
> and sane.
>
> I don't really see a semantic issue with the NULL case, either, unlike
> other scalar types.

Current behavior:

  <?php
  $v = NULL;
  echo $v->foo->bar;
  ?>
  Notice: Trying to get property of non-object in %s on line %d
  Notice: Trying to get property of non-object in %s on line %d

So trying to access a property on NULL gives a notice, but trying to
access an element of NULL shouldn't?  Also note, that chained property
access raises multiple notices.

-- 
Christoph M. Becker