How can I merge PHP arrays?

Question

I have two arrays of animals (for example).

$array = array(
    array(
        'id' => 1,
        'name' => 'Cat',
    ),
    array(
        'id' => 2,
        'name' => 'Mouse',
    )
);

$array2 = array(
    array(
        'id' => 2,
        'age' => 321,
    ),
    array(
        'id' => 1,
        'age' => 123,
    )
);

How can I merge the two arrays into one by the ID?

Answer 1

@Andy

http://se.php.net/array_merge

That was my first thought but it doesn't quite work - however array_merge_recursive might work - too lazy to check right now.