PHP - Check if two arrays are equal

Question

I'd like to check if two arrays are equal. I mean: same size, same index, same values. How can I do that?

Using !== as suggested by a user, I expect that the following would print enter if at least one element in the array(s) are different, but in fact it does not.

if (($_POST['atlOriginal'] !== $oldAtlPosition) 
    or ($_POST['atl'] !== $aext) 
    or ($_POST['sidesOriginal'] !== $oldSidePosition) 
    or ($_POST['sidesOriginal'] !== $sideext)) {

    echo "enter";
}

Answer 1

$arraysAreEqual = ($a == $b); // TRUE if $a and $b have the same key/value pairs.
$arraysAreEqual = ($a === $b); // TRUE if $a and $b have the same key/value pairs in the same order and of the same types.

See Array Operators.

EDIT

The inequality operator is != while the non-identity operator is !== to match the equality operator == and the identity operator ===.