PHP: different elements between two arrays

Question

I have two different arrays like this

 $array1 = [1, 2, 8, 10];
 $array2 = [2, 4, 6, 8, 10, 15, 1];

I want to get the common elements and uncommon elements between them. I almost figured out how to get the common ones as the code below but I can't get uncommon elements.

for($x = 0; $x < count($array1); $x++) {

    for($z = 0; $z < count($array2); $z++) {
            if ( $array1[$x] == $array2[$z] ) {

                $array3 = $array1[$x];
                print_r($array3);

            } elseif ($array1[$x] !== $array2[$z]) {
                // code...
            }

        }
    }

How to get those uncommon or different elements between the two arrays without using a built-in PHP method then output them in a new array.

Watch php array functions like php.net/manual/en/function.array-intersect.php — Giacomo M
– Giacomo M, Commented May 29, 2020 at 22:29
I mentioned that I need to know the answer without using any built-in functions or methods — mrdyan
– mrdyan, Commented May 29, 2020 at 22:33

Kunal Raut · Accepted Answer · 2020-05-29 22:50:36Z

1

You can get the uncommon elements by using in_array() function

<?php
 $array1 = [1, 2, 8, 10];
 $array2 = [2, 4, 6, 8, 10, 15, 1];

  $result = []; 
 for($i = 0;$i < sizeof($array2);$i++){
 if(!in_array($array2[$i],$array1)){
    $result[] =  $array2[$i];
  }
 }
?>

Output

Array
(
    [0] => 4
    [1] => 6
    [2] => 15
)

answered May 29, 2020 at 22:50

Kunal Raut

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2 Comments

mrdyan Over a year ago

what if we cant use in_array method, how to do it?

Kunal Raut Over a year ago

You can do it by two for loops for both the arrays and set the cindition as if their indexes not intersect fill them in an empty array and later on just print that resultant array

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