An array within an array?

Question

PHP

This is my array

$server_url_path = array(
"id" => array("qwester","client_number_id", "client_settings"),
"contact"); 

$url_path5 = "id";
$url_path6 = "client_number_id";

Can't find ID

if (in_array($url_path5, $server_url_path)) {
    echo "ID yes";
}

a Contact can find

if (in_array("contact", $server_url_path)) {
    echo "Con yes";
}

Inside the ID can also find

if (in_array($url_path6, $server_url_path["id"])) {
    echo "ID array yes";
}

Answer 1

maybe

if (isset ($server_url_path[$url_path5])){
echo "ID yes";
}

or

if (isset ($server_url_path['id'])){
echo "ID yes";
}

returns boolean upon checking for the presence of the given element