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To: Jakob Buchgraber <jakob.buchgraber@gmail.com>
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Subject: Re: [PHP-DEV] print_r outputs nothing for "false"
From: rasmus@lerdorf.com (Rasmus Lerdorf)

Jakob Buchgraber wrote:
> Hello!
> 
> While debuging I recognized that print_r does not output anything for 
> bool(false) (PHP 5.2.1).
> 
> e.g.
> <?php
> print_r (array (true, false, "String"));
> ?>
> 
> Expected result:
> Array
> (
>     [0] => 1
>     [1] => 0
>     [2] => String
> )
> 
> Actual result:
> Array
> (
>     [0] => 1
>     [1] =>
>     [2] => String
> )
> 
> 
> I was not quite sure whether this is expected behavior, so I haven't 
> opened a bug yet.
> 
> So, is it expected and why?

Because false is not 0.  0 evaluates to false, but so do many other things.

-Rasmus