Matthew Weier O'Phinney wrote:
* Merlin <news.groups@xxxxxx>:
Hi there,
I am outputting an multidim. array. That works fine, except one thing. The first
letter of the value inside dimension 1 always gets printed.
For example:
I fill the arrays:
while ($row = mysql_fetch_object($result)){
$cat[$row->main_id][name] = $row->main_name;
$cat[$row->main_id][$row->sub_id][name] = $row->sub_name;
}
First off, if you're creating associative arrays, you should quote the
keys:
$cat[$row->main_id]['name'] = $row->main_name;
If you don't do so, PHP assumes you're using a constant value for the
key name.
Then I output them:
foreach ($cat AS $maincat){
echo $maincat[name].':';
Quote your keys!
foreach($maincat AS $subcat){
You do realize that the above will also loop over the index 'name',
right?...
echo $subcat[name].$br;
and since it does, the first element in that array is 'name', which
isn't an array, but a string. Since the 'name' constant isn't defined,
it will interpret that as 'true', or 1, and so it takes the first
character of that string.
}
echo $br;
}
Which does result in:
Europe:E
Germany
UK
North America:N
US
CA
As you can see I get the extra letters N and E. Is this an php error or did I do
something wrong?
So, what you should probably do is create an additional layer in your
multi-dimensional array for the subcategories, and have it of the form
sub_id => sub_name:
$cat[$row->main_id]['subs'][$row->sub_id] = $row->sub_name;
Then loop over that:
foreach ($cat as $main_cat) {
echo $maincat['name'] . ":\n";
foreach ($maincat['subs'] as $sub_id => $sub_name) {
echo "$sub_name$br"; // could also use $sub_id here if
// desired
}
}
This is very helpful and does work. However I did not understand it completley.
What if I want to add another value, for example name2 or name3.
It looks like this example is limited to id and name.
Could I just add:
$cat[$row->main_id]['subs'][$row->sub_id] = $row->name2;
Guess not. Can you tell me how to add other fields to the array?
Thank you in advance, Merlin
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