CODEWITHSUNDEEP
phparrays
Thomas
Thomas

Reputation: 53

Merge two multidimensional arrays in PHP

Supposing I've this array:

Array
(
    [country] => Array
        (
            [0] => France
            [1] => Canada
        )
    [capital] => Array
        (
            [0] => Paris
            [1] => Ottawa
        )
    [other] => value
)

Is it possible to merge the country and capital arrays ?

The desired output is the following:

Array
(
    [countries] => Array
        (
            Array 
                (
                    [country] => France
                    [capital] => Paris
            )
            Array 
                (
                    [country] => Canada
                    [capital] => Ottawa
            )
        )
    [other] => value
)

What I tried:

$result = array();

foreach($arr as $key=>$array) {
    $result[$key] = array_merge($array, $arr2[$key]);
}

Upvotes: 1

Views: 49

Answers (3)

dWinder
dWinder

Reputation: 11642

If you have known field to modify use:

$arr = ["country" => ["France", "Canada"], "capital" => ["Paris", "Ottawa"], "other" => "value"];
$keys = ["country", "capital"];

foreach($arr as $k => $v) {
    if (in_array($k, $keys)) {
        $slice[] = $v; // get the array which need to be merge
        unset($arr[$k]); // remove him from the original array
    }
}

$arr["countries"] = array_map(function ($e) use ($keys) {return array_combine($keys, $e);}, array_map(null, ...$slice));

And now $arr is set.

Notice the use of ... operator to explode the $slice array and the array_map with null which combine according to int keys.

This is the most generic way because if you want to change the field to merge you only need to do so in 1 place...

Upvotes: 1

Vamshi Rockzz
Vamshi Rockzz

Reputation: 71

Try to use below code it will works 100%

thank you.

<?php

$arr = [
    "country"=>["France","Canada"],
    "capital"=>["Paris","Ottawa"],
    "other"=>[]
];


$result = [
    "countries"=>[]
];

for($i=0;$i<count($arr["country"]);$i++){
    $data = [
        "country"=>$arr["country"][$i],
        "capital"=>$arr["capital"][$i]
    ];
    array_push($result["countries"],$data);
}


echo "<pre>";
print_r($result);
echo "</pre>";

Upvotes: 0

Vitalii
Vitalii

Reputation: 1175

If countries -> capitals keys and length are the same and you need only those values to be combined you can simply increment through one of arrays. For example:

$result = ['countries' => [], 'other' => $arr['other']];
for ($i = 0; $i < count($arr['country']); $i++) {
    $result['countries'][] = [
        'country' => $arr['country'][$i],
        'capital' => $arr['capital'][$i]
    ];
}

Upvotes: 1

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