Question

Is there any function in PHP which will give an array of uncommon values from two or more arrays?

For example:

$array1 = array( "green", "red", "blue");
$array2 = array( "green", "yellow", "red");
....
$result = Function_Needed($array1, $array2,...);
print_r($result);

Should give the output:

array("blue", "yellow", ...);

Answer 1

Use array_diff and array_merge:

$result = array_merge(array_diff($array1, $array2), array_diff($array2, $array1));

Here’s a demo.

For multiple arrays, combine it with a callback and array_reduce:

function unique(&$a, $b) {
    return $a ? array_merge(array_diff($a, $b), array_diff($b, $a)) : $b;
}

$arrays = array(
    array('green', 'red', 'blue'),
    array('green', 'yellow', 'red')
);

$result = array_reduce($arrays, 'unique');

And here’s a demo of that.