adding object elements to array when they don't have keys=>values

Question

I'm currently building an array off of an object and I've got one element called images that has multiple sub elements called 'urls' structured like so

categories": [
    {
      "images": [
        {

          "urls": [
            "path/test.jpg",
            "path/test2.jpg",
            "path/test3.jpg"
          ],
        },
        {

          "urls": [
            "path/test4.jpg",
            "path/test5.jpg",
            "path/test6.jpg"
          ],

        },
        {

          "urls": [
            "path/test7.jpg",
            "path/test8.jpg",
            "path/test9.jpg"
          ],

        },
]

The values there don't have keys, it's just the url path but I'd like to add these to my $groupItem array and just have each url be it's own element on the same level as the group number (basically I'm exporting and need each url as it's own column)

The structure I want

0 =>"path/test.jpg",
1 =>"path/test2.jpg",
2 =>"path/test3.jpg"
3 =>"path/test4.jpg",
4 =>"path/test5.jpg",
5 =>"path/test6.jpg"
6 =>"path/test7.jpg",
7 =>"path/test8.jpg",
8 =>"path/test9.jpg"

The loop/array:

foreach($prices->groups as $group){ 
    $groupItem = array(); 
    $groupItem["number"] = $group->number;

    foreach($group->images as $images){
        $groupItem["urls"] = $images->urls;
    }
}

How can I simply just add on any url to the groupItem level of that array?

You need to show the actual structure you want. What you show for structure doesn't show number or urls. — AbraCadaver
– AbraCadaver, Commented Jan 18, 2019 at 15:38
Also, $groupItem = array(); destroys your existing array each time thru the loop. — AbraCadaver
– AbraCadaver, Commented Jan 18, 2019 at 15:39

Alex Howansky · Accepted Answer · 2019-01-18 15:43:50Z

2

Outside the outer loop, init the value to an empty array:

$groupItem["urls"] = [];

Then use the empty array reference operator to append new values to the end of an array:

foreach($group->images as $images){
    $groupItem["urls"][] = $images->urls; // add this url to the end of the list
}

Alternatively, use array_push():

foreach($group->images as $images){
    array_push($groupItem["urls"], $images->urls);
}

I think you can probably also skip the inner loop and just use the array explode operator like this:

array_push($groupItem["urls"], ...$images->urls);

edited Jan 18, 2019 at 15:43

answered Jan 18, 2019 at 15:37

Alex Howansky

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8 Comments

Geoff_S Over a year ago

That gives me an array called "urls" though, with each url inside. I want to take the actual URL and make them unindexed elements at the same level as the group->number

Alex Howansky Over a year ago

That will give you an array with both indexed and associative keys -- is that really what you want? You won't be able to iterate it properly.

Geoff_S Over a year ago

I'm getting ``` "number" => "123" "urls" => array:4 [ //URL paths in here ] ``` but i want ``` "number" => "123" 0 => urlPath/1.jpg 1 => urlPath/2.jpg 2 => urlPath/3.jpg 3 => urlPath/4.jpg ```

Geoff_S Over a year ago

yes because It needs to be 2d to dump to laravel excel. I just want them in the same row as the category info

Alex Howansky Over a year ago

Ok then just use this: $groupItem[] = $images->urls;

|

The fourth bird · Accepted Answer · 2019-01-18 17:02:33Z

1

You might also use array_column with (from php 5.6) a variable length argument list:

For example, for the images which contains an array of objects where each object has a property urls and contains an array of image urls:

foreach ($prices->groups as $group) {
    $groupItem = array();
    $groupItem["number"] = $group->number;
    $groupItem= array_merge($groupItem, ...array_column($group->images, "urls"));    
}

Demo

edited Jan 18, 2019 at 17:02

answered Jan 18, 2019 at 15:58

The fourth bird

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8 Comments

Geoff_S Over a year ago

foreach($group->images as $images){                 $groupItem[] = array_merge(...array_column($images, "urls"));             }

I tried this but it doesn't work

Geoff_S Over a year ago

Your example works but I can't add it to my array that way

The fourth bird Over a year ago

@TomN. Would it be $groupItem["urls"] = array_merge(...array_column($images, "urls")); without using the foreach.

Geoff_S Over a year ago

I tried that and it gives me 0 => array:12 [ …12] which is close, but I need those 12 elements to each be 0=>, 1=> etc. So the top level of my array still just has 12 elements, one of which is this array of 12 where I need it to actually have 15 elements on that one level

Geoff_S Over a year ago

I;m getting ``` 0 => array:4 [▼ "number" => "123" 0 => array:12 [ …12] ] ``` I need ``` 0 => array: [▼ "number" => "123" 0 => "filepath/1.jpg" 1 => "filepath/2.jpg" 2 => "filepath/3.jpg" 3 => "filepath/4.jpg" 4 => "filepath/5.jpg" 5 => "filepath/6.jpg" 6 => "filepath/7.jpg" 7 => "filepath/8.jpg" etc ] ```

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