RE: [PHP] Sizeof variable variable arrays
> -Original Message-
> From: Neil Freeman [mailto:[EMAIL PROTECTED]]
> Sent: 11 January 2002 12:03
>
> Who's awake today then? :) What I'm trying to do is create variable
> variable arrays and then fill these arrays with values. The problem I
> have though is that the values don't appear to be getting stored - as
> following the assignment I have outputted a 'sizeof' command which
> always outputs 0.
Once again, I can't help wondering why go all round the houses with $$ instead of
using arrays -- in this case, 2-dimensional ones (arrays of arrays!):
>
> Here's a snippet of the code. Any ideas guys???
>
> ...
> //store children page_IDs into array for each parent
> $str_array = "menu_array_" . $current_parent_page_ID;
> $$str_array = array();
$str_array = array();
$str_array[$current_parent_page_ID] = array();
>
> for ($child_cnt = 0; $child_cnt < $number_children; $child_cnt++)
> {
> $db_help_structure->next_record();
>
> //get page_ID value
> $page_ID = $db_help_structure->return_single_result('page_ID');
>
> //$page_ID is now set
>
> echo "storing in $str_array position $child_cnt:" . $page_ID .
> "";
> $$str_array[$child_cnt] = $page_ID;
$str_array[$current_parent_page_ID][$child_cnt] = $page_ID;
> echo "size:" . sizeof($$str_array) . "";
> }
> ...
Mind you, I've done no comparison of the relevant efficiencies of the $$ method and
the 2-dimensional array -- I just find the arrays easier to comprehend (and less prone
to syntactical problems!!).
Cheers!
Mike
-
Mike Ford, Electronic Information Services Adviser,
Learning Support Services, Learning & Information Services,
JG125, James Graham Building, Leeds Metropolitan University,
Beckett Park, LEEDS, LS6 3QS, United Kingdom
Email: [EMAIL PROTECTED]
Tel: +44 113 283 2600 extn 4730 Fax: +44 113 283 3211
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Re: [PHP] Sizeof variable variable arrays
That's done the trick. More coffee for me I think :) Cheers Jason.
Jason Wong wrote:
> On Friday 11 January 2002 20:02, Neil Freeman wrote:
> > Hi there guys,
> >
> > Who's awake today then? :)
>
> Someone isn't :)
>
> > Here's a snippet of the code. Any ideas guys???
> >
> > ...
> > //store children page_IDs into array for each parent
> > $str_array = "menu_array_" . $current_parent_page_ID;
> > $$str_array = array();
> >
> > for ($child_cnt = 0; $child_cnt < $number_children; $child_cnt++)
> > {
> > $db_help_structure->next_record();
> >
> > //get page_ID value
> > $page_ID = $db_help_structure->return_single_result('page_ID');
> >
> > //$page_ID is now set
> >
> > echo "storing in $str_array position $child_cnt:" . $page_ID .
> > "";
> > $$str_array[$child_cnt] = $page_ID;
> > echo "size:" . sizeof($$str_array) . "";
> > }
>
> You need to resolve the ambiguity in your code by placing braces around the
> variable part of the variable variable (!)
>
> ie: ${$str_array}[$child_cnt] = $page_ID;
>
> See manual for details. See the annotated online manual for more examples.
>
> hth
> --
> Jason Wong -> Gremlins Associates -> www.gremlins.com.hk
>
> /*
> Go out and tell a lie that will make the whole family proud of you.
> -- Cadmus, to Pentheus, in "The Bacchae" by Euripides
> */
>
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Re: [PHP] Sizeof variable variable arrays
On Friday 11 January 2002 20:02, Neil Freeman wrote:
> Hi there guys,
>
> Who's awake today then? :)
Someone isn't :)
> Here's a snippet of the code. Any ideas guys???
>
> ...
> //store children page_IDs into array for each parent
> $str_array = "menu_array_" . $current_parent_page_ID;
> $$str_array = array();
>
> for ($child_cnt = 0; $child_cnt < $number_children; $child_cnt++)
> {
> $db_help_structure->next_record();
>
> //get page_ID value
> $page_ID = $db_help_structure->return_single_result('page_ID');
>
> //$page_ID is now set
>
> echo "storing in $str_array position $child_cnt:" . $page_ID .
> "";
> $$str_array[$child_cnt] = $page_ID;
> echo "size:" . sizeof($$str_array) . "";
> }
You need to resolve the ambiguity in your code by placing braces around the
variable part of the variable variable (!)
ie: ${$str_array}[$child_cnt] = $page_ID;
See manual for details. See the annotated online manual for more examples.
hth
--
Jason Wong -> Gremlins Associates -> www.gremlins.com.hk
/*
Go out and tell a lie that will make the whole family proud of you.
-- Cadmus, to Pentheus, in "The Bacchae" by Euripides
*/
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