How can the spread operator in PHP be used to simplify the extraction of common values from multiple arrays?

When extracting common values from multiple arrays in PHP, the spread operator can be used to simplify the process by merging the arrays and then using array_intersect to find the common values. This approach reduces the complexity of the code and makes it more concise.

$array1 = [1, 2, 3, 4];
$array2 = [2, 3, 4, 5];
$array3 = [3, 4, 5, 6];

$commonValues = array_intersect(...[$array1, $array2, $array3]);

print_r($commonValues);