php question (Wordpress)

Evil Phil

Still new to php so go easy :P

So what I want to do is add an element to an array. So what I'm doing is using the get_tags() function to return an array (tags) of tag arrays. Each tag has the following structure:

[php]
[term_id] => 28
[name] => Featured
[slug] => featured
[term_group] => 0
[term_taxonomy_id] => 29
[taxonomy] => post_tag
[description] =>
[parent] => 0
[count] => 6
[/php]

What I want to do is iterate through the tags and add a new element to each tag array.

So for I've tried iterating through and adding the field but it's not saved outside of the foreach loop:
[php]
$tags = get_tags();
foreach($tags as $tag)
{
$tag = get_object_vars($tag);
array_push($tag, 'secondvalue');
$tag = "hello";
}

foreach($tags as $tag)
{
$tag = get_object_vars($tag);
// The element 'secondvalue' isn't present in the next line of code
echo $tag . " " . $tag . " | ";
}
[/php]

So what am I doing wrong? How do I get the new element to remain in $tags?

cython

I'm open to correction here, but I think the foreach copies out the element, so you're not actually adding to the original array element there (pass by value vs pass by reference and all that). My guess would be to try something like
[php]
$tags = get_tags();
foreach($tags as $tag_index => $tag)
{
$tag = get_object_vars($tag);
array_push($tag, 'secondvalue');
$tag = "hello";
$tags[$tag_index] = $tag;
}

foreach($tags as $tag)
{
$tag = get_object_vars($tag);
// The element 'secondvalue' isn't present in the next line of code
echo $tag . " " . $tag . " | ";
}
[/php]

I haven't tested this, but it should save the updated tag back into the array for you in the same position

Evil Phil

That didn't seem to work for me (I'd say the problem is with me, not your code ), what I've ended up doing is:

[php]
$tags = get_tags();
reset($tags);
while(list($tag, $item) = each($tags))
{
$item->secondvalue = "hello";
}
foreach($tags as $tag)
{
$tag = get_object_vars($tag);
echo $tag . " " . $tag . " | ";
}
[/php]

Works fine.