[PHP] Sizeof variable variable arrays
Hi there guys,
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.
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;
$$str_array = array();
for ($child_cnt = 0; $child_cnt $number_children; $child_cnt++)
{
$db_help_structure-next_record();
//get page_ID value
$page_ID = $db_help_structure-return_single_result('page_ID');
//$page_ID is now set
echo storing in $str_array position $child_cnt: . $page_ID .
br;
$$str_array[$child_cnt] = $page_ID;
echo size: . sizeof($$str_array) . br;
}
...
Email: [EMAIL PROTECTED]
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Re: [PHP] Sizeof variable variable arrays
On Friday 11 January 2002 20:02, Neil Freeman wrote:
Hi there guys,
Who's awake today then? :)
Someone isn't :)
Here's a snippet of the code. Any ideas guys???
...
//store children page_IDs into array for each parent
$str_array = menu_array_ . $current_parent_page_ID;
$$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 .
br;
$$str_array[$child_cnt] = $page_ID;
echo size: . sizeof($$str_array) . br;
}
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
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;
$$str_array = array();
for ($child_cnt = 0; $child_cnt $number_children; $child_cnt++)
{
$db_help_structure-next_record();
//get page_ID value
$page_ID = $db_help_structure-return_single_result('page_ID');
//$page_ID is now set
echo storing in $str_array position $child_cnt: . $page_ID .
br;
$$str_array[$child_cnt] = $page_ID;
echo size: . sizeof($$str_array) . br;
}
You need to resolve the ambiguity in your code by placing braces around the
variable part of the variable variable (!)
ie: ${$str_array}[$child_cnt] = $page_ID;
See manual for details. See the annotated online manual for more examples.
hth
--
Jason Wong - Gremlins Associates - www.gremlins.com.hk
/*
Go out and tell a lie that will make the whole family proud of you.
-- Cadmus, to Pentheus, in The Bacchae by Euripides
*/
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RE: [PHP] Sizeof variable variable arrays
-Original Message-
From: Neil Freeman [mailto:[EMAIL PROTECTED]]
Sent: 11 January 2002 12:03
Who's awake today then? :) What I'm trying to do is create variable
variable arrays and then fill these arrays with values. The problem I
have though is that the values don't appear to be getting stored - as
following the assignment I have outputted a 'sizeof' command which
always outputs 0.
Once again, I can't help wondering why go all round the houses with $$ 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;
$$str_array = array();
$str_array = array();
$str_array[$current_parent_page_ID] = array();
for ($child_cnt = 0; $child_cnt $number_children; $child_cnt++)
{
$db_help_structure-next_record();
//get page_ID value
$page_ID = $db_help_structure-return_single_result('page_ID');
//$page_ID is now set
echo storing in $str_array position $child_cnt: . $page_ID .
br;
$$str_array[$child_cnt] = $page_ID;
$str_array[$current_parent_page_ID][$child_cnt] = $page_ID;
echo size: . sizeof($$str_array) . br;
}
...
Mind you, I've done no comparison of the relevant efficiencies of the $$ 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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