APC values randomly disappear
- by Michael
I'm using APC for storing a map of class names to class file paths. I build the map like this in my autoload function:
$class_paths = apc_fetch('class_paths');
// If the class path is stored in application cache - search finished.
if (isset($class_paths[$class])) {
return require_once $class_paths[$class];
// Otherwise search in known places
} else {
// List of places to look for class
$paths = array(
'/src/',
'/modules/',
'/libs/',
);
// Search directories and store path in cache if found.
foreach ($paths as $path) {
$file = DOC_ROOT . $path . $class . '.php';
if (file_exists($file)) {
echo 'File was found in => ' . $file . '<br />';
$class_paths[$class] = $file;
apc_store('class_paths', $class_paths);
return require_once $file;
}
}
}
I can see as more and more classes are loaded, they are added to the map, but at some point the apc_fetch returns NULL in the middle of a page request, instead of returning the map.
Getting => class_paths
Array
(
[MCS\CMS\Helper\LayoutHelper] => /Users/mbl/Documents/Projects/mcs_ibob/core/trunk/src/MCS/CMS/Helper/LayoutHelper.php
[MCS\CMS\Model\Spot] => /Users/mbl/Documents/Projects/mcs_ibob/core/trunk/src/MCS/CMS/Model/Spot.php
)
Getting => class_paths
{null}
Many times the cached value will also be gone between page requests.
What could be the reason for this?
I'm using APC as an extension (PECL) running PHP 5.3.
