PHP - Merge two arrays (same-length) into one associative?

Question

pretty straightforward question actually..

is it possible in PHP to combine two separate arrays of the same length to one associative array where the values of the first array are used as keys in the associative array?

I could ofcourse do this, but I'm looking for another (built-in) function, or more efficient solution..?

function Combine($array1, $array2) {
    if(count($array1) == count($array2)) {
        $assArray = array();
        for($i=0;$i<count($array1);$i++) {
            $assArray[$array1[$i]] = $array2[$i];
        }
        return $assArray;
    }
}

"ass array", definitely an easy to recall name. ;)

Domenico De Felice
– Domenico De Felice

2015-09-14 10:04:24 +00:00
Commented Sep 14, 2015 at 10:04 — Domenico De Felice
– Domenico De Felice, Commented Sep 14, 2015 at 10:04

Community · Accepted Answer · 2023-11-17 20:42:18Z

74

array_combine($keys, $values)

PS: Click on my answer! Its also a link!

edited Nov 17, 2023 at 20:42

CommunityBot

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answered Jul 29, 2009 at 14:57

Tyler Carter

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OneOfOne · Accepted Answer · 2009-07-29 14:59:21Z

17

you need array_combine.

<?php
$a = array('green', 'red', 'yellow');
$b = array('avocado', 'apple', 'banana');
$c = array_combine($a, $b);

print_r($c);
?>

answered Jul 29, 2009 at 14:59

OneOfOne

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Gumbo · Accepted Answer · 2009-07-29 14:58:17Z

10

There’s already an array_combine function:

$combined = array_combine($keys, $values);

answered Jul 29, 2009 at 14:58

Gumbo

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2 Comments

gumuruh Over a year ago

but array combine dosn't take null values into a new array. :(

Gumbo Over a year ago

@gumuruh Could you elaborate on that?

elaz · Accepted Answer · 2017-06-03 17:11:12Z

2

hello everybody i will show you how to merge 2 arrays in one array

we have 2 arrays and i will make one array from them

 $data_key  = array('key1','key2');
 $data_value = array('val1','val2');

lets declare the main array

$main_array = array();

now let's fill it with the 2 arrays

foreach ($data_key as $i => $key) {
         $main_array[$key] = $data_value[$i];
}

now let's see the result by using var_dump($main_array);

array(2) { 
["key1"]=> string(4) "val1"
["key2"]=> string(4) "val2" 
}

i hope that can help someone :)

answered Jun 3, 2017 at 17:11

elaz

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