Hello, 

unless I have overlooked something, there seems to be no easy way to get a slice of an associative array based on certain keys. I would like to be able to do something like the following:

$array["a"] = 1;
$array["b"] = 2;
$array["c"] = 3;

$slice = hash_slice($array, array("a", "c"));

which would result in $slice becoming an array containing the values 1 and 3, associated with the keys a and c, respectively.

If something like this already exists, I'd be happy if you could let me know; otherwise, I'd like to suggest this as a feature for a future version of PHP. Thank you!