How to remove key from another array that holds values?

Question

let's suppos we have the following two arrays

Let's suppose this is called $array1

Array
(
    [0] => Array
        (
            [Name] => Jack
            [Height] => 190
            [Shoe Size] => 40
        )

    [1] => Array
        (
            [Name] => Rose
            [Height] => 160
            [Shoe Size] => 52
        )

)

Suppose this is called $array2

Array
(
    [0] => Name
    [1] => Shoe Size
)

Now, what I need to do, is to keep the keys in $array1 which are found in $array2 as values, so the output I'm expecting is something like this

Array
(
    [0] => Array
        (
            [Name] => Jack
            [Shoe Size] => 40
        )

    [1] => Array
        (
            [Name] => Rose
            [Shoe Size] => 52
        )

)

I tried array_intersect and array_intersect_key but they're both failing. does anyone have any idea how to do this?

may not be most efficient, but a simple foreach loop would be easy — user557846
– user557846, Commented Apr 6, 2014 at 23:29

lafor · Accepted Answer · 2014-04-06 23:35:31Z

2

What you need is array_intersect_key with array_flip

$array3 = array_flip($array2);
foreach($array1 as &$a) {
   $a = array_intersect_key($a, $array3);
}

answered Apr 6, 2014 at 23:35

lafor

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2 Comments

Ali Over a year ago

Not quite working, but I get your concept and might be able to work with it.

lafor Over a year ago

@ChosenWann Works exactly as expected. $array1 gets modified directly, if you want the output to be stored in a brand new array, replace $a = with $newarray[] = .

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