php re-index numeric keys in associative array with combined numeric and string keys

Question

I have this array

 [20_fill_1] => Array
    (
        [autoTuned] => Array
            (
                [0] => fill-0*6.35*6.6*legitPhraseWith*VMWshkqbhfA*fill_3.mp4
            )

        [fill] => Array
            (
                [0] => fill-0*6.35*6.6*subwordPhraseWith*VMWshkqbhfA*fill_4.mp4
            )

        [1] => fill-0*6.35*6.6*legitPhraseWith*VMWshkqbhfA*fill_3.mp4
        [ill] => Array
            (
                [oil] => Array
                    (
                        [0] => oil-0*6.8*7.05*similarSubwordPhraseWith*HZNbg-1bz1c*oil_4.mp4
                    )

            )

    )

The reason there is no [0] is because I just unset it. Now I want that [1] to become the new [0], and if there were more numeric keys, i'd want them to also change so the numeric keys are in order. However, I need to keep the string keys.

Edit:this was the array before I removed the zeroth element:

[20_fill_1] => Array
    (
        [0] => added#fill-0*6.35*6.6*subwordPhraseWith*VMWshkqbhfA*fill_4.mp4
        [autoTuned] => Array
            (
                [0] => fill-0*6.35*6.6*legitPhraseWith*VMWshkqbhfA*fill_3.mp4
            )

        [fill] => Array
            (
                [0] => fill-0*6.35*6.6*subwordPhraseWith*VMWshkqbhfA*fill_4.mp4
            )

        [1] => fill-0*6.35*6.6*legitPhraseWith*VMWshkqbhfA*fill_3.mp4
        [ill] => Array
            (
                [oil] => Array
                    (
                        [0] => oil-0*6.8*7.05*similarSubwordPhraseWith*HZNbg-1bz1c*oil_4.mp4
                    )

            )

    )

Looks to me like you may want to back up and think of another approach to solving your problem. What exactly are you trying to accomplish here? I'm sure you could hack together a way to do what you're asking but it would be an ugly way to do whatever it is you're trying to do. — Rob Ruchte
– Rob Ruchte, Commented Aug 13, 2017 at 0:20
well i'm unsetting values in the first array dimension that contain a certain string — I need help
– I need help, Commented Aug 13, 2017 at 0:21
@I need help please be more specific as much as yon can and explain your reasoning better so other can help you better :) — Kick Buttowski
– Kick Buttowski, Commented Aug 13, 2017 at 0:22
Please present a larger/better representation of your input, and show your expected result. — mickmackusa
– mickmackusa ♦, Commented Aug 13, 2017 at 2:29

Community · Accepted Answer · 2020-06-20 09:12:55Z

1

If your array isn't very large, you could build another array:

$output = [];

foreach ($original as $key => $item):
  if(is_string($key)) $output[$key] = $item;
  else $output[] = $item;
endforeach;

$output is what you want.

Update:

You could also unshift (insert) a dummy element at the start of the array, then shift (remove) it. This will re-key the numerical keys and leave the string keys alone:

array_unshift($original,'dummy');
array_shift($original);

thanks to @brennonbrimhall for the inspiration.

edited Jun 20, 2020 at 9:12

CommunityBot

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answered Aug 13, 2017 at 0:28

BeetleJuice

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4 Comments

I need help Over a year ago

sadly its a huge multidimensional array :/

BeetleJuice Over a year ago

@Ineedhelp must the element order be maintained? The re-keying is just for the top-level array right? (in other words you don't need to go into the multi-dimensions to re-key sub-arrays.

BeetleJuice Over a year ago

@Ineedhelp I updated my answer so that you won't need to create a second array in memory, since your input is a huge array.

Abela Over a year ago

That array_unshift() + array_shift() is crazy, but wowzer does it work!

brennonbrimhall · Accepted Answer · 2017-08-13 00:25:38Z

0

Rather than unset the 0th element, consider using array_shift. It will automatically remove the 0th element, reindex other numerical indices, and preserve non-numerical keys and values.

answered Aug 13, 2017 at 0:25

brennonbrimhall

541 silver badge7 bronze badges

1 Comment

I need help Over a year ago

sometimes it isn't the first element I am removing tho

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