How to check it elemets of an array are in another array

Question

I have an issue, I have this array

$items= array('ABC','DEF',GHI');

and have another two arrays

$array1 = array('ABC','DEF',GHI');

$array2 = array('DEF');

$array1 should return TRUE because all elements are in $items

$array2 should return FALSE because 'ABC' and 'GHI' arent in that array

i've tried with array_intersect and array_diff but i cant get it,

  $result = array_intersect($items,$array1);
  $result = !array_diff($items,$array1);

Could you please help me? Regards Mario

What if $array1 had other values like 'JKL' would it still be true? — AbraCadaver
– AbraCadaver, Commented Oct 14, 2021 at 17:29
Well then the arrays need to be exactly the same? Just use == then. — AbraCadaver
– AbraCadaver, Commented Oct 14, 2021 at 17:34
Sort the arrays and then use == if each has to contain all elements of the other. — Barmar
– Barmar, Commented Oct 14, 2021 at 17:35

AbraCadaver · Accepted Answer · 2021-10-14 17:37:18Z

0

To see if the array contains at least all values in $items, just get all values from the array that are also in $items and compare it with $items:

$result = (array_intersect($array1, $items) == $items);

If you just need to compare the arrays:

$result = ($array1 == $items);

But why is this not working for you:

$result = !array_diff($items, $array1);

answered Oct 14, 2021 at 17:37

AbraCadaver

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1 Comment

mxr10 Over a year ago

I tried with == but if i change the order to 'DEF','ABC',GHI' that give me false, but it should be true, because it doesn't matter the order,

Onur Ozfuttu · Accepted Answer · 2021-10-14 18:00:23Z

0

If you dont want to use array_diff, you can use the multidimensional arrays.

Put your arrays inside another array:

$items1= array(
    array(0=>"ABC", 1=> "DEF", 2=>"GHI"),
    array(0=>"ABC", 1=> "DEF", 2=>"GHI"),
    array(0=>"DEF"),
);

Check them with conditional statements:

if($items1[0]==$items1[1]){
    echo "true";
}if($items1[1]==$items1[2]){
    echo "true 2";
}else{
    echo "false";
}

answered Oct 14, 2021 at 18:00

Onur Ozfuttu

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