CODEWITHSUNDEEP
phparrayscategories
Kaiser
Kaiser

Reputation: 2005

Get all elements in an array from category and subcategories arrays

I'm programming in PHP and I've these arrays:

Category array:

$type = array("fruit","veggie","other");

Subcategory arrays:

$fruit=array("apple","orange");
$veggie=array("bean","pea");
$other=array("bread","cake");

I can get all the elements of the subcategories with:

$all_elements = array_merge($fruit,$veggie,$other);

But this expressions has the problem that if I've to create new categories I've to rewrite the expression.

I'd like to know how I can get an expression like next one to get the same result:

$all_elements = array_merge(SOMETHING($type));

Thanks in advance!!!!!

Upvotes: 1

Views: 568

Answers (3)

Adam Sinclair
Adam Sinclair

Reputation: 1649

Take a look at compact:

compact — Create array containing variables and their values

So you want to do:

$type = array("fruit","veggie","other");
$fruit=array("apple","orange");
$veggie=array("bean","pea");
$other=array("bread","cake");

print_r(compact(($type)));

OUTPUT

Array
(
    [fruit] => Array
        (
            [0] => apple
            [1] => orange
        )

    [veggie] => Array
        (
            [0] => bean
            [1] => pea
        )

    [other] => Array
        (
            [0] => bread
            [1] => cake
        )

)

However, I recommend you to do it completly differently, as @Rasclatt suggested:

$food['fruit'][]    =   'apple';
$food['fruit'][]    =   'orange';
$food['veggie'][]   =   'bean';
$food['veggie'][]   =   'pea';
$food['other'][]    =   'bread';
$food['other'][]    =   'cake';

Upvotes: 2

Rasclatt
Rasclatt

Reputation: 12505

I think I would create one array that you can add to. You can more easily merge and handle new categories. You can loop through the array to get types and sub-types.

$food['fruit'][]    =   'apple';
$food['fruit'][]    =   'orange';
$food['veggie'][]   =   'bean';
$food['veggie'][]   =   'pea';
$food['other'][]    =   'bread';
$food['other'][]    =   'cake';

Upvotes: 1

Jared Dunham
Jared Dunham

Reputation: 1527

I would layout the data differently: 

 $item["fruit"]=array("apple","orange");
 $item["veggie"]=array("bean","pea");
 $item["other"]=array("bread","cake");

So if you want $all_elements you could just ask for $item instead:

print_r ($item);

And if you want a certain category: 

print_r ($item["veggie"]);

Upvotes: 0

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