How can I find the array key from second array where the inner keys and values match first array?

Question

I have Array #1 which contains:

Array
(
    [attribute_pa_color] => blue
    [attribute_pa_size] => large
)

I have Array #2 which contains:

Array
(
    [4624] => Array
        (
            [attribute_pa_color] => blue
            [attribute_pa_size] => large
        )

    [4625] => Array
        (
            [attribute_pa_color] => blue
            [attribute_pa_size] => medium
        )

    [4626] => Array
        (
            [attribute_pa_color] => blue
            [attribute_pa_size] => small
        )

)

How can I find the array key from Array #2 where the inner keys and values match Array 1's?

I have been experimenting with multiple foreach's but I can't seem to get this right, this is my current idea:

$i = 0;
foreach( $array_2 as $array2_key => $array2_array ) {

    foreach( $array2_array as $a2_key => $a2_value ) {

        if( $a2_value == $array1[$a2key] ) {

            $i = $i + 1;

            if( $i == count( $array1 ) ) {

                $break = 1;

            }

            if( $break == 1 ) {

                break;

            }

        }

    }

    if( $break == 1 ) {

        echo 'key is: ' . $array2_key;

        break;

    }

}

Answer 1

Arrays can be compared with == :

foreach ($array2 as $key => $item) {
    if ($item == $array1) {
        echo 'Item with key ' . $key;
    }
}

Answer 2

由于array_search接受针的数组甚至更容易：

$key = array_search($array1, $array2);