foreach loop problem - php

Question

Foreach don't work properly because in the a array there are multiple arrays and also objects.
For example:
Array
(
[0] => modelItem Object
(
[name] => Name 1
[option] => Array
(
[0] => modelOption Object
(
[id] => 28383
[price] => 1.70
)
)
[quantity] => 2
)
[1] => modelItem Object
(
[name] => Name 2
[option] => Array
(
[0] => modelOption Object
(
[id] => 28398
[price] => 3.50
)
)
[quantity] => 2
)
[subtotal] => 10.40
[deliveryArea] => modelDeliveryArea Object
(
[postcode] => BL2
)
[delivery] => 1
)
I want foreach only loop on modelItem Object and modelItem Object only, how can that be done?
I have tried doing this:
<?php
foreach ($items as $key => $item) {
echo $item->name;
foreach ($item->option as $o) {
echo $o->price;
}
}
?>
It work fine but I also get an error:
Warning: Invalid argument supplied for foreach()
This is because of subtotal, deliveryArea I think.
Edit: Sorry, fixed the loop code - forgot to add { }

Answer 1

Try:
<?php
foreach ($items as $key => $item) {
if ($item instanceof modelItem) {
echo $item->name;
if (isset($item->option) && is_array($item->option)) {
foreach ($item->option as $o) {
echo $o->price;
}
}
}
}

Answer 2

Okay, the reason your code doesn't work, is because you are mixing types of your arrays. Which means you're going to have problems if you always expect $item to be a class. IF you can, I recommend restructuring your array so that your modelItem objects are in an array by themselves to make life easier.
If you cant... Try this:
<?php
if (is_array($items)) {
foreach ($items as $key => $item) {
if(is_a($item, 'modelItem')) {
echo $item->name;
foreach ($item->option as $o) {
echo $o->price;
}
}
}
}
As a side note is_a() is deprecated in php 5.0 - 5.2 and is now undeprecated in php 5.3. If you are using php 5.0 - 5.2 see yoshi's example.

Answer 3

In array like this I would recommend to check like this:
if(isset($someVar))
{
}
or in your case check if is_array like this:
if(is_array($something))
{
}
You can not loop trough a string in your case subtotal, deliveryArea
I hope it helps!