#20548 [Ver->WFx]: Decrement ("$x[$y]--") doesn't work on uninitiated variable

From: Date: Sun, 03 Aug 2003 17:57:50 +0000
Subject: #20548 [Ver->WFx]: Decrement ("$x[$y]--") doesn't work on uninitiated variable
References: 1  Groups: php.bugs 
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 ID:               20548
 Updated by:       iliaa@php.net
 Reported By:      prgallier at yahoo dot com
-Status:           Verified
+Status:           Wont fix
 Bug Type:         Scripting Engine problem
 Operating System: Linux 2.4
 PHP Version:      4.3.2-dev
 New Comment:

This is a valid bug, however a fix would be a BC break that would
result in a beahviour change that was in place since 3.0 days.


Previous Comments:
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[2003-02-14 17:14:59] bulletbait at yahoo dot com

I just stumbled across this bug recently with an older version (4.1.1)
of PHP on Win32 -- verified that it still exists in 4.3.0.  This one
had me going in circles trying to debug.  Work-arounds:

  $score[$num] -= 1;

or
  $score[$num] = $score[$num] - 1;

------------------------------------------------------------------------

[2002-11-21 12:42:11] prgallier at yahoo dot com

The following:
  $score[$num]--;
does not affect $score[$num] if $score[$num] is uninitiated.
Using $score[$num]++ does work, however.
This is inconsistent.


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