PHP Multidimensional Array Merge based on keys

Question

i have this two arrays:

$array1 = [
  '1' => 285.52,
  '2' => 427.76
];

$array2 = [
  '1' => 123.44,
  '2' => 48.32
];

The keys on each of them are the id for the client, the first one is the amount owed and the second one is the amount payed, i want to achieve the following:

$mergedArrays = [
   '1' => [
     'owed'  => 285.52,
     'payed' => 123.44
   ],
   '2' => [
     'owed'  => 427.76,
     'payed' => 48.32
   ]
];

I was wondering if there's a PHP function to do so, i tried with array_merge_recursive but it just makes an array with the four elements together.

Any help would be really appreciated.

Nothing built in without nesting/chaining a few built in functions like array_column with array_combine and similar. — Jonathan Kuhn
– Jonathan Kuhn, Commented Dec 16, 2016 at 18:16
@HillaryClintonEmailRemover I dunno, i thought it was more efficient performance wise to do it using built in functions, thanks tho — DSB
– DSB, Commented Dec 16, 2016 at 18:29

Fabio · Accepted Answer · 2016-12-16 18:19:21Z

1

you can loop in the first array and merge the second according to keys

foreach($array1 as $key => $val) {
    $mergedArrays[$key] = array('owed' => $val, 'payed' => $array2[$key]);
}

sample

edited Dec 16, 2016 at 18:19

answered Dec 16, 2016 at 18:16

Fabio

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3 Comments

user7273509 Over a year ago

he said non traditional

Fabio Over a year ago

There's nothing not traditional as built in function for this

user7273509 Over a year ago

exectly what i thought i dunno why he wants to use some complex things to do simple tasks

Wolverine · Accepted Answer · 2016-12-16 19:51:37Z

1

$array1 = [
  '1' => 285.52,
  '2' => 427.76
];

$array2 = [
  '1' => 123.44,
  '2' => 48.32
];

$final_arr = array_map(function($a1, $a2) {
    return array(
        'owed' => $a1,
        'paid' => $a2
    );
}, $array1, $array2);

$final_arr = array_combine(array_keys($array1), $final_arr);

var_dump($final_arr);

Based on the comment, it seems you're looking for built-in PHP functions to do the task for you rather than going for traditional looping. But the looping method provided by Fabio is the simplest one you could go for without any other complicated approaches. I've tried my best to provide you the solution using the core PHP functions. Hope you're happy with it!

answered Dec 16, 2016 at 19:51

Wolverine

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