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Bug #13741 Cannot walk the same associative array twice in the same script
Submitted: 2001-10-19 06:19 UTC Modified: 2001-10-19 18:33 UTC
From: milo at cyberlifelabs dot com Assigned:
Status: Not a bug Package: Arrays related
PHP Version: 4.0.6 OS: FreeBSD 4.2-RELEASE
Private report: No CVE-ID: None
 [2001-10-19 06:19 UTC] milo at cyberlifelabs dot com
I have a simple associative array of scalar name/value 
pairs -- specifically, the 50 US states and their 
abbreviations. The array is sorted using asort().

Two places in my script, I walk the array using the 
list/each syntax:

	while(list($abbr,$name) = each($STATES_HASH))
	{
		...
	}

The first time, everything works as it should. All 
subsequent times however (within the same script) the 
array acts as though it's blank. If I query the size using 
sizeof(), it reports the correct value. If I try to 
extract values from the array, it works fine. If I make a 
copy of the array to a new variable, the copy works 
properly (the first time).

It seems like there's a bug in the each() function. Looks 
almost as if every associative array has a pointer to the 
current element that's not getting reset when each() is 
done with it.

My configure line is as follows:

?'./configure' '--prefix=/usr/local/php-4.0.6' 
'--with-apache=../apache_1.3.19' 
'--with-pgsql=/usr/local/pgsql' '--enable-track-vars' 
'--with-config-file-path=/etc' 
'--with-jpeg-dir=/usr/local' '--with-tiff-dir=/usr/local' 
'--with-png-dir=/usr/local' '--with-zlib-dir=/usr/local' 
'--with-pdflib=/usr/local'


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 [2001-10-19 06:35 UTC] hholzgra@php.net
see http://php.net/reset
 [2001-10-19 06:38 UTC] hholzgra@php.net
... or read the documentation on each() itself:

"[...]
After each() has executed, the array cursor will be left on the next element of the array, or on the last element if it hits the end of the array
[...]"

 [2001-10-19 18:33 UTC] jeroen@php.net
And you should be using foreach anyway in this case.
 
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