Edit report at https://bugs.php.net/bug.php?id=19140&edit=1
ID: 19140
Comment by: mail at waclawjacek dot com
Reported by: jc at mega-bucks dot co dot jp
Summary: foreach fails on empty or unitialized variable
Status: Not a bug
Type: Bug
Package: Arrays related
Operating System: Red Hat Linux 7.2
PHP Version: 4.2.2
Block user comment: N
Private report: N
New Comment:
I found this idea somewhere on the net, thanks, it's pretty neat, still, it was
a
surprise to find out this is how foreach() behaves after years of using while()
to loop through an array of database results.
Previous Comments:
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[2012-09-01 15:51:49] ras...@php.net
Often that points to a bug. If you are ok with it, just cast it. No need for an
is_array() check. eg.
foreach( (array)$a as $val ) ...
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[2012-09-01 15:45:59] mail at waclawjacek dot com
I second jc. It would be nice not to have to do if ( is_array() ) before every
foreach(), like you don't have to with while(), when the variable is null.
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[2002-08-28 05:41:03] der...@php.net
FYI: I clearified this in the manual, it will show up in a few days online.
Derick
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[2002-08-28 05:32:48] jc at mega-bucks dot co dot jp
Neglectful coding? Why do you consider it neglectful coding if I do this for an
array but good coding for a string? PHP treats null strings as empty strings,
why doesn't it do the same for arrays?
All I want to know is, what is the documented behaviour for foreach on a null
array. If there is no documented behaviour, let's add to the documentation.
Something like:
"foreach will fail on an unitialized (null) array".
I had assumed that since PHP is usually treats null strings as empty strings it
would do the same with null arrays. I was wrong. I tried to find documentation
on what foreach will do in the case of a null array and could not find any.
I agree with you that this is neglectfull coding. It would be nice if there was
documentation to back it up :)
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[2002-08-28 05:17:20] cy...@php.net
if you insist on neglectful coding, lower your error_reporting level.
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the rest of the comments, please view the bug report online at
https://bugs.php.net/bug.php?id=19140
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