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 Sep 14 '15 at 10:04 — Domenico De Felice, Sep 14 '15 at 10:04

score 72 · Accepted Answer · answered Jul 29 '09 at 14:57

72

array_combine($keys, $values)

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

answered Jul 29 '09 at 14:57

Tyler Carter

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score 15 · Answer 2 · answered Jul 29 '09 at 14:59

15

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 '09 at 14:59

OneOfOne

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score 10 · Answer 3 · answered Jul 29 '09 at 14:58

10

There’s already an array_combine function:

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

answered Jul 29 '09 at 14:58

Gumbo

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1

but array combine dosn't take null values into a new array. :( – gumuruh Apr 04 '12 at 19:16
@gumuruh Could you elaborate on that? – Gumbo Apr 04 '12 at 20:39

score 2 · Answer 4 · answered Jun 03 '17 at 17:11

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 :)

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

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