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Request #13363 variable variables with arrays
Submitted: 2001-09-18 07:50 UTC Modified: 2002-04-27 16:09 UTC
From: developer at jaaboo dot com Assigned:
Status: Closed Package: Feature/Change Request
PHP Version: 4.0.6 OS: all
Private report: No CVE-ID: None
View Developer Edit
 [2001-09-18 07:50 UTC] developer at jaaboo dot com 
$dynvar = "GLOBALS[first][second]";
echo $$dynvar;

result : nothing , no error and no output!

for arrays stored in variables only to ways are working:

$dynvar = "GLOBALS";
echo ${$dynvar[first][second]};

or more dynamic but more slower!

$dynvar = "<"."?PHP echo \$GLOBALS[first][second]; ?".">";
eval $dynvar;

you can use a variable to store instead of echo!

I think this breaks the rules of assigning variable variables . It must be possible to store the complete call of the array in a variable. 

The Way implemented jet is not praktical!!!!! Real World Tested! There are so much postings in many Forums and Mailinglist with no suggestion . I can't understand this! So i must think this is a BUG! or was forgotten to realize!

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 [2001-09-18 08:24 UTC] hholzgra@php.net 
$$ is just a shortcut for a lookup in the variable hashtable
of the current namespace ($GLOABLS if outside a function)

so you end up with the equivalent of $GLOBALS["GLOBALS[first][second]"]
which is obviously not supposed to work as a multidimensional array access

IMHO $$ should *not* become to clever aka. complicated

moved to feature requests for now although the amount of
exclamation marks used almost justified bogusification
 [2002-04-27 16:09 UTC] jimw@php.net 
indeed, use eval() when this level of indirection is necessary.
 
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