php - How do I set expire time for Zend Cache Storage? -

i store xml in zend filesystem cache , have expire after 30 minutes. how 1 set cache duration / expiry? using zend cache component , not in context of full zf2 application.

$cache   = \zend\cache\storagefactory::factory(array(     'adapter' => array(         'name' => 'filesystem',         'ttl' => 60, // kept short during testing         'options' => array('cache_dir' => __dir__.'/cache'),     ),     'plugins' => array(         // don't throw exceptions on cache errors         'exception_handler' => array(             'throw_exceptions' => false         ),     ) )); $key    = 'spektrix-events';    $events = new simplexmlelement($cache->getitem($key, $success));  if (!$success) {     $response = $client->setmethod('get')->send();     $events = new simplexmlelement($response->getcontent());     $cache->setitem('spektrix-events', $events->asxml()); }   var_dump($cache->getmetadata($key)); // mtime on file stays same timestamp ls -al in terminal. 

how set expiration time , subsequently check if cache has expired? above code not seem expire cache after 60 seconds (the .dat file's timestamp not change)

have tried set option ttl in adapter options?

'adapter' => array(     'name' => 'filesystem',     'options' => array(         'cache_dir' => __dir__.'/cache',         'ttl' => 3600,     ), ), 

zf documentation has nice quick start examples, ttl presented.

update:

i have tested next script, , ttl working should. have problem elsewhere.

$cache = zend\cache\storagefactory::factory(array(     'adapter' => array(         'name'    => 'filesystem',         'options' => array('ttl' => 5),     ), ));  $cache->setitem('a', 'b'); ($i = 1; $i <= 7; $i++) {     sleep(1);     echo "var_dump on {$i}th second ... ";     var_dump($cache->getitem('a')); } 

output :

var_dump on 1th second ... string(1) "b" var_dump on 2th second ... string(1) "b" var_dump on 3th second ... string(1) "b" var_dump on 4th second ... string(1) "b" var_dump on 5th second ... null var_dump on 6th second ... null var_dump on 7th second ... null