Get a value from a key of two arrays

Question

ARRAY 1:

array(1) {
  ["en"]=>
  array(1) {
    ["em"]=> null
  }
}

ARRAY 2 VALUES:

array(15) {
  ["something"]=>
  array(4) {
    ["somekey1"]=>
    string(25) "value1"
    ["somekey2"]=>
    string(9) "value2"
    ["somekey3"]=>
    string(5) "value3"
    ["somekey4"]=>
    string(3) "value4"
  }
  ["en"]=>
  array(3) {
    ["em"]=>
    string(4) "RESULT"

Look at array on ["en"]["em"] = "RESULT" from both arrays.

I want using $array1 and $array2 to intersecting a keys of array and get a result from $array2:

NOTE: On Array1 can be more nested arrays, ARRAY1 should find this keys on ARRAY2:

NOTE: I don't want to grab a data like $array2["en"]["em"], only using custom functions. (for example: custom array_intersect())

I have 2 arrays. Look at only keys. On Array1 there is en,em keys. I want these two keys to intersecting on Array2. When is intersecting with Array2, it will on Array2 get a value en,em->RESULT. I don't want a classical way to grab a data, just a COMPARE TWO ARRAYS and GET A VALUE.

I've tried intersecting, but this ONLY works if two arrays ARE SAME. So, I need to intersecting using nested recursive searching by key!

Example, I don't want:

$array2['en']['em'];

some_function_to_search_array_by_key(array $array2);

Example, that I WANT to:

Using function `array_intersect()` or some hardcoded sample.

get_result_by_two_arrays($array1, $array2);

Example of Result:

INPUT:

// search by arrays keys
$array1 = array('en' => 'em');

$result = get_result_by_two_arrays($array1, $array2);

RESULT:

$result = 
(string)RESULT;

I've tried to grab a data from array2 using array_intersect() but it's strings problem. I want grabbing a data from array2 using compare keys and pick up a value from array2. — Marin Sagovac
– Marin Sagovac, Commented Aug 30, 2013 at 15:09
Brate, kad bi mi tebe razumeli šta ti hoćeš ;) Like @RocketHazmat said, output example would be nice. — Glavić
– Glavić, Commented Aug 30, 2013 at 15:16
But $array1 = ['en' => ['em' => null]]; from top is not different from $array1 = ['en' => 'em']; in example. — Glavić
– Glavić, Commented Aug 30, 2013 at 15:33

Glavić · Accepted Answer · 2013-08-30 16:01:10Z

1

Here is a simple example of what I think you want :

$array1 = ['en' => ['em' => null]];
$array2 = ['en' => ['em' => 'RESULT'], 'something' => ['somekey1' => 'somevalue1', 'somekey2' => 'somevalue2']];

function get_result_by_two_arrays(array $array1, array $array2) {
    if (!$array1) return;
    do {
        $key = current(array_keys($array1));
        $array1 = current($array1);
        if (!isset($array2[$key])) return;
        $array2 = $array2[$key];
    } while (is_array($array1));
    return $array2;
}

var_dump( get_result_by_two_arrays($array1, $array2) );
# string(6) "RESULT"

answered Aug 30, 2013 at 16:01

Glavić

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2 Comments

Marin Sagovac Over a year ago

You are AWESOME! Thank you! Works! It's working as full array and on one array! GREAT SNIPPET!

Marin Sagovac Over a year ago

I think this can be useful snippet! Thanks.

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