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Bug #36552 Setting multiple variables to "" with list results in " Invalid opcode 98/1/1"
Submitted: 2006-02-27 22:11 UTC Modified: 2006-02-28 11:44 UTC
From: stitched at mindspring dot com Assigned:
Status: Not a bug Package: Reproducible crash
PHP Version: 5.1.2 OS: Windows 2000
Private report: No CVE-ID: None
View Developer Edit
 [2006-02-27 22:11 UTC] stitched at mindspring dot com 
Description:
------------
Setting multiple variables to an empty string "" using list results in the error below and PHP terminates: 

Fatal error: Invalid opcode 98/1/1. in phpfail.php on line 1

I tested with the latest build available for Windows which is PHP 5.1.3-dev (cli) (built: Feb 20 2006 00:29:25).  phpinfo reports that the build command was:

cscript /nologo configure.js "--enable-snapshot-build" "--with-gd=shared"

Reproduce code:
---------------
<?php list($Var1,$Var2) = ""; ?>

Expected result:
----------------
I expected both $Var1 and $Var2 to be set to an empty string.  Setting them individually works as expected.

Actual result:
--------------
Fatal error: Invalid opcode 98/1/1. in phpfail.php on line 1

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 [2006-02-28 00:39 UTC] bjori@php.net 
Thank you for taking the time to write to us, but this is not
a bug. Please double-check the documentation available at
http://www.php.net/manual/ and the instructions on how to report
a bug at http://bugs.php.net/how-to-report.php

php.net/list: "Note:  list() only works on numerical arrays and assumes the numerical indices start at 0."

use $var1 = $var2 = "";
 [2006-02-28 01:04 UTC] stitched at mindspring dot com 
Very sorry for the bogus report then.  FWIW 4.4.2 doesn't complain about that usage at all and it's been working fine for many 4.x versions.

Dave
 [2006-02-28 01:52 UTC] bjori@php.net 
(don't know how I managed to change the summary..)

Dave: No, It has never worked as you expected.
list($foo, $bar) = ""; will (in 4.4.3-dev) set $foo and $bar to NULL, not empty string.

- Hannes :)
 [2006-02-28 11:44 UTC] stitched at mindspring dot com 
Thank you Hannes.  Whether null or empty string it didn't throw an error and that was the point I was trying to make :)  When I switched to 5 quite a few things "broke" because of my usage of it that way and it surprised me that something rather simple like that suddenly no longer worked and caused a fatal error.

Thanks again for taking the time to respond and clarify what it was really doing.

Dave
 
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