Comparing 2 Arrays

Looking for a function if one exists that can compare 2 arrays and tell me the elements that are the same in each.

My array example is:
Array
(
[0] => Array
(
[word] => the
[nav] => Array
(
[0] => 1
[1] => 3
[2] => 7
)

[sub] => Array
(
[0] => 1
[1] => 2
)

)

[1] => Array
(
[word] => char
[nav] => Array
(
[0] => 1
[1] => 3
)

)

[nav] => Array
(
[0] => 1
[1] => 3
[2] => 7
)

)



I am looking for similar numbers in the sub array ['nav'] and in the case above the results should be 1 and 3.

Can anyone help?

D.

Try having a look at:
array-intersect (http://www.php.net/manual/en/function.array-intersect.php)

Thanks I will do.

D.

Another problem has occurred.

I now have the following array:
Array
(
[0] => 0
[1] => 1
[2] => 2
)

where the values are indexes in another array.
Since there are 3 values I was planning on adding these to the array_intersect function but I want to add them dynamically to the following:

$aTmp = array_intersect([array key values in here]);

Is this possible?

Thanks for any help.
D.