Question

Sorry for the simple question, just want to make sure I’m doing this right. How do I check a memcache variable expiration date and query my database again only if the expiration date hasn’t expired? Is empty() all that is needed?

here’s my code:

$memcache = new Memcache;
$memcache->connect('localhost', 11211);

$dbQuery=$memcache->get('dbQuery');

if(empty($dbQuery)){
    $dbQuery=$this->db->query("SELECT * FROM items WHERE ...");
    $memcache->set('dbQuery', $dbQuery, false, 60*60);
    $dbQuery=$memcache->get('dbQuery');
}
else{
}
return $dbQuery;

Answer 1

I do it the following way:

$result = $memcache->get($some_key);

if( $result === false ) {
//set() key stuff goes here
}

return $result;

get() returns FALSE if the key is not found.
http://www.php.net/manual/en/memcache.get.php