PHP Combining arrays after foreach

Question

i have products that belong to categories and i need to get such categories and output them as a single array. This is my this code:

    $act_prod = array(0=>1,1=>10);
    $active_cat = array();

    foreach ($act_prod as $act) {
        $cat = $this->getDi()->productTable->load($act);
        $active_cat[$act] = $cat->getCategories(); 
    } 

    print_r($active_cat);

Which will output:

Array ( [1] => Array ( [0] => 1 ) [10] => Array ( [0] => 2 ) )

This means product 1 belongs to category 1 and product 10 to category 2 but i dont need all that. I only need the categories like this: Array (1, 2) or Array (0=>1, 1=>2).

What should i use so i get the correct output?

Thank you.

Your $cat->getCategories(); is returning an array. Hence, each key in your $active_cat contains an array — asprin
– asprin, Commented Apr 14, 2014 at 5:08
@CainNuke - In that case how should your expected array will look ? — Rikesh
– Rikesh, Commented Apr 14, 2014 at 5:08
It can either look like this: Array ( [0] => 1 [1] => 2 ) or like this: Array (1, 2) — Cain Nuke
– Cain Nuke, Commented Apr 14, 2014 at 5:12

RobP · Accepted Answer · 2014-04-14 05:08:50Z

1

Modified your code to build up just the list you want.

$act_prod = array(0=>1,1=>10);
$active_cat = array(); // will be a flat list of categories

foreach ($act_prod as $act) {
    $cat = $this->getDi()->productTable->load($act);
    foreach($cat->getCategories as $category) {
        // if we have not seen this category on any previous category, push it
        if(!in_array($cat->getCategories(), $active_cat)) {
            array_push($active_cat, $cat->getCategories()); 
        }
    }
} 

// if desired, sort array first
print_r($active_cat);

answered Apr 14, 2014 at 5:08

RobP

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Parag Tyagi · Accepted Answer · 2014-04-14 05:09:14Z

1

foreach ($act_prod as $act) {
    $cat = $this->getDi()->productTable->load($act);
    $cats = $cat->getCategories(); 

    foreach($cats as $cat)
    {
         $active_cat[] = $cat['cat_id'];
    }
}

Assuming cat_id is your category id

answered Apr 14, 2014 at 5:09

Parag Tyagi

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1 Comment

RobP Over a year ago

this solution will leave duplicates in the returned array.

Ja͢ck · Accepted Answer · 2014-04-14 05:17:37Z

1

You need to flatten the $active_cat array, like this:

// ...
foreach ($cat->getCategories() as $category) {
    $active_cat[] = $category;
}
// ...

Afterwards, make sure there are no duplicates:

$active_cat = array_unique($active_cat);

answered Apr 14, 2014 at 5:17

Ja͢ck

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