CODEWITHSUNDEEP
php
Sequenzia
Sequenzia

Reputation: 2381

PHP - Concatenate values of 2 arrays into 1 new array

I have 2 separate multidimensional arrays that have the same structure. Example:

Array
(
    [0] => Array
        (
            [uploadData] => 1234 Main St
        )

    [1] => Array
        (
            [uploadData] => 5678 Elm St
        )

    [2] => Array
        (
            [uploadData] => 9879 New St
        )

    [3] => Array
        (
            [uploadData] => 9876 Shady Lane
        )

)

Array
(
    [0] => Array
        (
            [uploadData] => Orlando
        )

    [1] => Array
        (
            [uploadData] => Tampa
        )

    [2] => Array
        (
            [uploadData] => Miami
        )

    [3] => Array
        (
            [uploadData] => West Palm Beach
        )

)

I just need to get them into 1 new array that looks like this:

Array
(
    [0] => Array
        (
            [uploadData] => 1234 Main St Orlando
        )

    [1] => Array
        (
            [uploadData] => 5678 Elm St Tampa
        )

    [2] => Array
        (
            [uploadData] => 9879 New St Miami
        )

    [3] => Array
        (
            [uploadData] => 9876 Shady Lane West Palm Beach
        )

)

I've been trying to use array_merge but I cannot get it to work.

Upvotes: 1

Views: 848

Answers (4)

mickmackusa
mickmackusa

Reputation: 48100

Because the two arrays have the same size and there are no associative first level keys to preserve, they can be mapped together with array_map() and concatenated.

Code: (Demo)

$streets = [
    ['uploadData' => '1234 Main St'],
    ['uploadData' => '5678 Elm St'],
    ['uploadData' => '9879 New St'],
    ['uploadData' => '9876 Shady Lane'],
];

$cities = [
    ['uploadData' => 'Orlando'],
    ['uploadData' => 'Tampa'],
    ['uploadData' => 'Miami'],
    ['uploadData' => 'West Palm Beach'],
];

var_export(
    array_map(
        fn($s, $c) => ['uploadData' => "{$s['uploadData']} {$c['uploadData']}"],
        $streets,
        $cities
    )
);

Upvotes: 0

hakre
hakre

Reputation: 198237

Fetch from both arrays until everything is gone:

$final = [];
$key   = 'uploadData';
while ($array1 && $array2)
{
    $final[][$key] = array_shift($array1)[$key] . ' ' . array_shift($array2)[$key];
}

See array_shift and converting to booleans.

Upvotes: 1

dev-null-dweller
dev-null-dweller

Reputation: 29492

Simple, recursive, key-independent solution:

function array_concat_recursive($array1, $array2){
    $result = array();
    foreach($array1 as $key => $value){
        if(isset($array2[$key])){
            if(is_array($value)){
                $result[$key] = array_concat_recursive($value, $array2[$key]);
            }else{
                $result[$key] = $value . ' ' . $array2[$key];
            }
        }
    }
    return $result;
}

Upvotes: 3

random_user_name
random_user_name

Reputation: 26180

Assuming that:

  1. Your first array is assigned to a variable called $address
  2. Your second array is assigned to a variable called $city
  3. There are ALWAYS exact matches between the two arrays

EDIT:
Great catch by @dev-null-dweller - edited to catch full depth of arrays.

NOTE
Example code in question does not have quotes around uploadData key, so that is replicated here:

The following will do what you want:

foreach($address as $key=>$value) {
    $newarray = array(
         'uploadData'=>$value['uploadData'] . ' ' . $city[$key]['uploadData'];
    );
}

The $newarray will contain an array structured per your request.

Upvotes: 2

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