Get values from second array where keys match

Question

I have two arrays, the following:

$arr1 = array("Key1"=>1, "Key2"=>2, "Key3"=>3);

My second array is the following:

$arr2 = array("Key2", "Key3");

What I would like to get is the values where Key2 and Key3 matches. I would also like those values to be returned as an array so I end up with the following:

array(2,3)

Thanks for any help.

See: stackoverflow.com/q/11644267/3933332 + Take a look at array_values() to reindex the array with numerical keys — Rizier123
– Rizier123, Commented Feb 27, 2016 at 16:13

Murad Hasan · Accepted Answer · 2016-02-27 16:21:42Z

4

Just use of 3 three array functions to achieve this.

$arr1 = array("Key1"=>1, "Key2"=>2, "Key3"=>3);
$arr2 = array("Key2", "Key3");

$arr3 = array_values(array_intersect_key($arr1, array_flip($arr2)));
print_r($arr3);

The output:

Array ( [0] => 2 [1] => 3 )

answered Feb 27, 2016 at 16:21

Murad Hasan

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Comments

caramba · Accepted Answer · 2016-02-27 16:18:56Z

1

$arr1 = array("Key1"=>1, "Key2"=>2, "Key3"=>3);
$arr2 = array("Key2", "Key3");

$result = array();

foreach($arr1 as $key => $value) {
    if(in_array($key, $arr2)) {
        array_push($result, $arr1[$key]);
    }
}

var_dump($result);

or as mentioned in the comments:

$arr1 = array("Key1"=>1, "Key2"=>2, "Key3"=>3);
$arr2 = array("Key2", "Key3");

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

var_dump($result);

answered Feb 27, 2016 at 16:18

caramba

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