public function purgeExpired()
    {

        if ($this->sqlInitialized()) {
            if ($this->sql) {
                if ($this->sql->query("
                    DELETE
                        FROM `{$this->table}`
                        WHERE `expire` < NOW()
                ")) {
                    return true;
                }
            }
        }
        return false;
    }
public function purgeExpired()
    {

        if ($this->sqlInitialized()) {
            if ($this->sql) {
                if ($this->sql->query("
                    DELETE
                        FROM `{$this->table}`
                        WHERE `expire` < NOW()
                ")) {
                    return true;
                }
            }
        }
        return false;
    }
public function purgeExpired ( ) { if ( $ this -> sqlInitialized ( ) ) { if ( $ this -> sql ) { if ( $ this -> sql -> query ( "
                    DELETE
                        FROM `{$this->table}`
                        WHERE `expire` < NOW()
                " ) ) { return true ; } } } return false ; }
Purge expired cache data

@return boolean Returns `TRUE` on success, `FALSE` on failure

@see setLifetime() setLifetime()
Purge expired cache data