Cant find a way to compare array keys

Question

I've got these two arrays:

Array ONE
(
    [39] => Dude, Harry [10%]
    [36] => Occonell, Tim [90%]
)

Array TWO
(
    [1] => Person, Admin
    [2] => Snow, John
    [3] => Jane, Marry
    [14] => Kelchenko, Igory
    [18] => Bery, Grass
    [36] => Occonell, Tim
)

I'm trying to delete value from second array, if it's key is equal to first one. So my array should look like:

Array TWO
(
    [1] => Person, Admin
    [2] => Snow, John
    [3] => Jane, Marry
    [14] => Kelchenko, Igory
    [18] => Bery, Grass
)

I have attempted to find an answer else where, but I could not find one.

Community · Accepted Answer · 2023-11-17 20:11:10Z

3

array_diff() is in the right direction, but you want to do stuff with the keys of the arrays, so use: array_diff_key(), e.g.

print_r(array_diff_key($array2, $array1));

As an example:

$array2 = [
    1 => "a",
    2 => "b",
    3 => "c",
    4 => "d",
    5 => "e",
]; 

$array1 = [
    2 => "Don't want this key",
    4 => "Also don't want this one",
];

output will be:

Array ( 
    1 => a
    3 => c
    5 => e
)

edited Nov 17, 2023 at 20:11

CommunityBot

11 silver badge

answered Aug 25, 2015 at 11:33

Rizier123

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Comments

Mubin · Accepted Answer · 2015-08-25 11:34:05Z

3

you can do following

foreach($arr_one as $key => $val){
    if(isset($array_2[$key]))    unset($array_2[$key]);
}

answered Aug 25, 2015 at 11:34

Mubin

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