可接受的Memcached用法

Question

I'm having a bit of trouble with Memcached.

I have this code below:

if(!$Z->get('user')) {
    $Z->set('user', $hs->load_hs_main($_GET['from'], $_GET['table']));
}

$je = $Z->get('user') ? $Z->get('user') : $hs->load_hs_main($_GET['from'], $_GET['table']);

What $Z->get('user') and $je are supposed to be is a MySQLi result object. This gives weird effects like print_r not functioning and it just doesn't look right.

I want to check if an object exists that was created by memcached and use it if it exists.. but if it doesn't, set it.

Answer 1

The correct way to get an item from cache or create/load it from somewhere else if it doesn't exist is this:

$user = $Z->get('user'); // get it from cache, returns falsy value if not found
if(!$user) { // not found
    $user = $hs->load_hs_main(...); // load the element from somewhere else
    $Z->set('user', $user); // cache it
}
// here $user always exists