Extract Array from another array using an array PHP

Question

I have two arrays like this

 $arr1 = Array('fn', 'ln', 'em');
 $arr2 = Array('fn'=>'xyz',  'ano' => 'abc', 'ln'=>'122', 'em' => '[email protected]', 'db'=>'xy');

I want to create an array from arr2 with all the elements from $arr1. So the result should be like this.

 $result = Array( 'fn'=>'xyz', 'ln'=>'122', 'em'='[email protected]');

Don't want to loop.

Any idea?

@Rocket. I think there should be function that should be able to do this. Its a simple task. — Kevin Rave
– Kevin Rave, Commented Jun 8, 2012 at 20:33

goat · Accepted Answer · 2012-06-08 20:35:39Z

9

The order of arguments is important here

 print_r(array_intersect_key($arr2, array_flip($arr1)));

answered Jun 8, 2012 at 20:35

goat

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1 Comment

@KevinRave: A up-vote is +10, you can also give it a +15 by marking it "accepted" (the checkmark under the votes) :-P

gen_Eric · Accepted Answer · 2012-06-08 20:32:31Z

4

You can use array_map for this.

// PHP 5.3+ only
$result = array_combine($arr1, array_map(function($a) use($arr2){
    return $arr2[$a];
}, $arr1));

If you have PHP < 5.3, you can do some trickery with array_intersect_key and array_flip.

$result = array_intersect_key($arr2, array_flip($arr1));

answered Jun 8, 2012 at 20:32

gen_Eric

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gen_Eric · Accepted Answer · 2012-06-08 20:41:40Z

0

You just have to loop, as in create a new array or maybe check some array set in mathematics functions. I think, maybe, insection might work.

gen_Eric

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answered Jun 8, 2012 at 20:39

Chimanet

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