Overrides DrupalDatabaseCache::clear().

Overrides DrupalDatabaseCache::clear

File

includes/cache-install.inc, line 42

Class

DrupalFakeCache

Defines a stub cache implementation to be used during installation.

Code

function clear($cid = NULL, $wildcard = FALSE) {
 // If there is a database cache, attempt to clear it whenever possible. The
 // reason for doing this is that the database cache can accumulate data
 // during installation due to any full bootstraps that may occur at the
 // same time (for example, Ajax requests triggered by the installer). If we
 // didn't try to clear it whenever this function is called, the data in the
 // cache would become stale; for example, the installer sometimes calls
 // variable_set(), which updates the {variable} table and then clears the
 // cache to make sure that the next page request picks up the new value.
 // Not actually clearing the cache here therefore leads old variables to be
 // loaded on the first page requests after installation, which can cause
 // subtle bugs, some of which would not be fixed unless the site
 // administrator cleared the cache manually.
 try {
 if (class_exists ('Database')) {
 parent ::clear ($cid, $wildcard);
 }
 } catch (Exception $e) {
 }
}

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