A PHP function to find a difference between 2 arrays. Can use a custom compare logic.

getArraysDifference.php

<?php

/**
 * Compares 2 arrays. Detects what needs to be removed from and added to the first array to turn it to the second array.
 *
 * @param array $array1
 * @param array $array2
 * @param callable|null $areEqual Detects whether two array elements are equal. The first argument is a first array
 *     value, the second argument is a second array value.
 * @return array[] An array with keys:
 *  - 0 - First array values that are not presented in the second array;
 *  - 1 - Second array values that are not presented in the first array;
 *  - 2 - Values presented in both arrays. Each array value is an array containing two values: a value from the first
 *        array and the corresponding value from the second array.
 */
function getArraysDifference(array $array1, array $array2, callable $areEqual = null): array
{
    $areEqual = $areEqual ?? function ($v1, $v2) { return $v1 === $v2; };

    $in1Only = [];
    $inBoth = [];

    foreach ($array1 as $value1) {
        // Looking for the array1 value in array2
        foreach ($array2 as $index2 => $value2) {
            if ($areEqual($value1, $value2)) {
                // If it is found, adding it to the "both" list
                $inBoth[] = [$value1, $value2];
                unset($array2[$index2]);

                continue 2;
            }
        }

        // If it is not found, adding it to the "only in array1" list
        $in1Only[] = $value1;
    }

    // Adding the rest values from array2 to the "only in array2" list
    $in2Only = array_values($array2);

    return [$in1Only, $in2Only, $inBoth];
}

getArraysDifferenceTest.php

<?php

// Requires PHPUnit

$this->assertEquals(
    [['bar'], ['qoo'], [['foo', 'foo'], ['baz', 'baz']]],
    getArraysDifference(['foo', 'bar', 'baz'], ['baz', 'qoo', 'foo'])
);

$this->assertEquals([
    [11, 245],
    [29, 91, 3],
    [[56, 55], [43, 41]]
], getArraysDifference(
    [56, 43, 11, 245],
    [41, 29, 91, 55, 3],
    function ($a, $b) { return floor($a / 10) == floor($b / 10); }
));