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

Answer 1

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);

Answer 2

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";
}