Zend Cache Howto PHP

Question

How can i do the followin tasks

public function addToCache($id,$items)
{
 // in zend cache
}

public function getFromCache($id)
{
 // in zend cache
}

The first method should take an id and items which should be cached.

The second method should just take an id of an cached object, and should return the content of the cache of that item id.

i want to be able to do something like that;

public function getItems()
{
   if(!$this->cache->getFromCache('items'))
   {
       $this->addToCache('items',$this->feeds->items());
       return $this->cache->getFromCache('items');
   }

}

How can i do the both methods in zend cache ?

Derek Illchuk · Accepted Answer · 2009-12-21 23:08:57Z

3

Everything to get started is in the Zend docs. You do have to dig in a little and get comfortable, it's not a "quick how do I do this" type of area.

But, the general cache-check looks like this:

$cache = /*cache object*/
if ( !($my_object = unserialize($cache->load('cache_key'))) ) {
  $my_object = /*not found so initialize your object*/
  $cache->save(serialize($my_object)); // magically remembers the above 'cache_key'
}

$my_object->carryOnAsIfNothingStrangeJustHappenedThere();

answered Dec 21, 2009 at 23:08

Derek Illchuk

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1 Comment

SMka Over a year ago

u do not need unserialize data. cache_aadapters has config option to do it on the fly

Victor Nicollet · Accepted Answer · 2009-12-21 22:42:55Z

2

Assuming that you have already set up an instance of Zend_Cache and have access to it through a local variable $this->cache, your functions would be implemented as:

function getFromCache($key) { return $this->cache->load($key); }
function addToCache($key,$value) { $this->cache->save($key,$value); }

answered Dec 21, 2009 at 22:42

Victor Nicollet

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3 Comments

streetparade Over a year ago

hmm.. i got this Fatal error: Uncaught exception 'Zend_Cache_Exception' with message 'Invalid id or tag : must be a string' in /var/www/inc/Zend/Cache.php:208 Stack trace:

Victor Nicollet Over a year ago

As far as I can remember, the key is expected to be a string. If you wish to provide anything else, you should convert it to string.

Juan de Parras Over a year ago

For avoid the Fatal error: Uncaught exception 'Zend_Cache_Exception' with message 'Invalid id or tag' You need to check if $key is valid name for cache: if (preg_match('/^[a-zA-Z0-9_]+$/', $load) > 0) { // load cache }

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