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To: Chris London <me@chrislondon.co>
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Date: Thu, 18 Jul 2013 16:33:40 +0200
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Subject: Re: [PHP-DEV] Feature Proposal: Allow letter decrementing
From: johannes@schlueters.de (Johannes =?ISO-8859-1?Q?Schl=FCter?=)

On Thu, 2013-07-18 at 07:46 -0600, Chris London wrote:
> My friend shared some code with me today that wasn't working for him. He
> was incrementing letters like this:
> 
> $letter = 'A';
> echo ++$letter; // Output: B
> 
> He was then trying to decrement letters like this:
> 
> $letter = 'B';
> echo --$letter; // Output: B
> 
> He was really confused why his code wasn't working.  Obviously the answer
> is, PHP doesn't support decrementing letters.

Oviously this documented in
http://de2.php.net/manual/en/language.operators.increment.php ;-)

> My question is, why specifically doesn't it?
> 
> It seems logical that if we support increment we should support decrement.

++$string; will always succeed. But what should $s = 'a'; --$s; result
in?

johannes