PHP - Can I shift an array from a specific key?

Question

I was having a little trouble with my array in PHP.

I have the following the array:

Array
(
    [0] => banana
    [1] => apple
    [2] => raspberry
    [3] => kiwi
    [4] => cherry
    [5] => nuts
)

But I want to kick out 'kiwi' and shift all other keys up, to get the following...

Array
(
    [0] => banana
    [1] => apple
    [2] => raspberry
    [3] => cherry
    [4] => nuts
)

I am sure someone here knows how to get it done, php's shift only takes to first key and not something specific.

Thanks in advance

hamon · Accepted Answer · 2021-12-16 06:34:20Z

5

This is what array_splice does for you. It even lets you insert new entries there if you so choose.

For this specific case you use:

array_splice($array, 3, 1);

edited Dec 16, 2021 at 6:34

hamon

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answered Apr 22, 2013 at 1:23

Niet the Dark Absol

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3 Comments

Starx Over a year ago

Does it regenerate the keys?

Starx Over a year ago

@SverriM.Olsen, No kidding.

Sebastian Over a year ago

Thanks a lot :) It works out fine by e.g.: array_splice($array , 3, 1);

Daniel · Accepted Answer · 2013-04-22 01:31:40Z

2

$array = array("banana", "apple", "raspberry", "kiwi", "cherry", "nuts");
$key = array_search('kiwi', $array);
unset($array[$key]);
$array = array_values($array);
print_r($array);

Output:
Array ( [0] => banana [1] => apple [2] => raspberry [3] => cherry [4] => nuts )

answered Apr 22, 2013 at 1:31

Daniel

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Comments

Starx · Accepted Answer · 2013-04-22 01:32:56Z

2

AFAIK, There is not any inbuilt function to do this, but you can create one. What you have to do is, delete an specific element and then recalculate the keys.

function a_shift($index, $array) {
     unset($array[$index));
     return array_values($array);
}

edited Apr 22, 2013 at 1:32

answered Apr 22, 2013 at 1:25

Starx

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4 Comments

Niet the Dark Absol Over a year ago

Um... What's the purpose of array_map here?

Starx Over a year ago

@Kolink, It will create a new array from the values only, thus resetting the keys. And because this is part of my bigger function I forgot to remove the case for nested arrays.

Niet the Dark Absol Over a year ago

Um, no it won't. It will iterate through each element of the array, and return the values of that array, throwing an error if any of the parent array's elements are not arrays... Just return array_values($arra); will do.

Starx Over a year ago

@Kolink, I was still completing my comment. Please read again.

hamon · Accepted Answer · 2021-12-15 17:05:38Z

0

I used this to remove keys from one array and copy to another:

$keys = [1, 3];
foreach ($keys as $index => $key) {
    if ($index != 0) {
        $key -= $index;
    }
    $newArr[] = array_splice($oldArr, $key, 1)[0];
}
return $newArr;

edited Dec 15, 2021 at 17:05

answered Dec 15, 2021 at 14:52

hamon

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