get array elements which have key in second array in php [duplicate]

Question

I need only array elements which have their keys in values of second array, with the fastest script.

$array_1 = array(
    'ana' => 'are',
    'du'  => 34,
    'bopq'=> "Ana are mere mereu",
    13    => "OK"
);

$array_2 = array('du', 13);

$expected_array = array(
    'du' => 34,
    13   => "OK"
);

There is faster solution than:

$expected_array = array_intersect($array_1, array_combine($array_2, $array_2);

?

So write some code and test. After that you can provide test results. — u_mulder
– u_mulder, Commented Jul 19, 2019 at 11:49
Show us your best effort and where you're stuck, so we can help you on your way. — lovelace
– lovelace, Commented Jul 19, 2019 at 11:51

Andreas · Accepted Answer · 2019-07-19 11:54:10Z

1

Array_intersect_key is what you are looking for.

$array_1 = array(
    'ana' => 'are',
    'du'  => 34,
    'bopq'=> "Ana are mere mereu",
    13    => "OK"
);

$array_2 = array('du', 13);

$result = array_intersect_key($array_1, array_flip($array_2));

https://3v4l.org/P6jkq

answered Jul 19, 2019 at 11:54

Andreas

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1 Comment

Arșavin Over a year ago

Is the fastest from these 3 solutions we have here.

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