check multidimensional array exists another multidimensional array

Question

I have toe different multidimensional array following :

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

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

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

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

    [3] => Array
        (
            [0] => 1
        )

)

I want to check small multidimensional array exists in bigger array. Any suggestion please. I am using

$diff = Hash::diff(samllarray, $bigger array); 

of cakephp and its result is

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

    [3] => Array
        (
            [0] => 1
        )

)

but in result I want only 3rd key but its also given me 2rd key see above

Answer 1

You can use is_array() to see if a variable is an array.

$arrs = array(
    0 => "big array",
    1 => "big array",
    3 => array(
        0 => "nested array",
        1 => "nested array"
    )
);

foreach ($arrs as $key=>$value) {
    if (is_array($value)) {
        echo "we've got an array at index {$key}";
    }
}