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Cache a variable in the data store
(PECL apc:3.0.0-3.0.9)
Note:
Unlike many other mechanisms in PHP, variables stored using apc_store() will persist between requests (until the value is removed from the cache). Parameters
ExamplesExample 216. A apc_store() example<?phpThe above example will output: string(3) "BAR"
See Also
Code Examples / Notes » apc_storephp
Seems to be no (easy) way at the to know how old a value fetched is and to check whether it is out of date. I've made these wrappers so that you can fetch and store values based on a udt returned from get_last_modified_date() which should return a udt of when your data was last changed, and hence needs junking out of the cache. function apc_fetch_udt($key){ $g = apc_fetch($key); if ($g){ list($udt,$val) = $g; if (get_last_modified_date()<$udt) { $val = unserialize($val); return $val; } else { apc_delete($key); } } } function apc_store_udt($key,$g){ $udt = time(); $g = serialize($g); $apc = array($udt,$g); apc_store($key, $apc); } sudhee
It should be noted that apc_store appears to only store one level deep. So if you have an array of arrays, and you store it. When you pull it back out with apc_fetch it will only have the top level row of keys with nulls as the values of each key. Solution to this, is to serialize the data before storing it in the cache and unserialize it while retrieving from the cache. jaskas
if you want to store array of objects in apc use ArrayObject wrapper (PHP5). <?php $objs = array(); $objs[] = new TestClass(); $objs[] = new TestClass(); $objs[] = new TestClass(); //Doesn't work apc_store('objs',$objs,60); $tmp = apc_fetch('objs'); print_r($tmp); //Works apc_store('objs',new ArrayObject($objs),60); $tmp = apc_fetch('objs'); print_r($tmp->getArrayCopy()); ?> roberto spadim
be sure that setting FALSE values can be wrong returned from fetch since fetch return FALSE on errors
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