PHP grouping content of multidimensional array with new structure [duplicate]

Question

I usually use Eloquent so transposing the data is much easier. However i'm struggling to this in vanilla PHP.

I have tried array_map(null, ...$array) however get an error due to it not being an array.

I have got the following keyed array:

[
    'email' => [
        "[email protected]",
        "[email protected]"
    ],
    'lastName' => [
        'Pool',
        'Ball'
    ],
    'firstName' => [
        'William',
        'Martyn'
    ],
    'id' => [
        'j8zwyk',
        '1'
    ]
]

I need to convert this to the following format:

[
    0 => [
        'email' => "[email protected]",
        'lastName' => 'Pool',
        'firstName' => 'William',
        'id' => 'j8zwyk'
    ],
    1 => [
        'email' => "[email protected]",
        'lastName' => 'Ball',
        'firstName' => 'Martyn',
        'id' => '1'
    ]
]

Mohammad · Accepted Answer · 2018-11-28 12:17:08Z

7

Create new array with length 2 and loop through origin array. In loop insert relevant item into new array.

So if your array has only 2 item per key use

$newArr = [];
foreach($arr as $key=>$item){
    $newArr[0][$key] = $item[0];
    $newArr[1][$key] = $item[1];   
}

But if it has unknown item use

$newArr = [];
foreach($arr as $key=>$item){
    foreach($item as $key2=>$item2)
        $newArr[$key2][$key] = $item2;
}

Check result in demo

edited Nov 28, 2018 at 12:17

answered Nov 28, 2018 at 12:09

Mohammad

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4 Comments

Martyn Ball Over a year ago

Close, but that doesn't account for if I get more than 2 emails etc... this is basically a form submitting, so the amount of emails and names etc could be any.

Martyn Ball Over a year ago

Spot on, thanks. I did think of doing it like this but I figured there might be a better way.

davidethell Over a year ago

Second example is the best way, better than my answer, because it doesn't assume all child arrays have the same count.

Martyn Ball Over a year ago

Thanks for your help, I will mark that one as the answer then for historical reference.

davidethell · Accepted Answer · 2018-11-28 12:13:21Z

4

$newArray = [];
foreach ($array as $key => $value) {
    for ($i = 0; $i < count($value); $i++) {
        $newArray[$i][$key] = $value[$i];
    }
}

answered Nov 28, 2018 at 12:13

davidethell

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