oop - prevent session initialization in incomplete php object -

i'm using mvc pattren , start sessions in construct of controller class . class (expect core's one) loaded spl_autoload_register(). create ajax class that's subclass of controller in order prevent user executing multiple ajax request in short interval of time use following code

class ajax extends controller {      public function __construct()     {         parent::__construct(false);         if ($this->checkattempts())             exit();        }      public function checkattempts()     {         $counter = 0;         $attempts = session::get(ajax);         $attempts = ($attempts === false) ? [] : $attempts;         if ($attempts === false)             session::set(ajax, []);         else             $this->setattempt();         foreach ($attempts $key => $attempt)         {             if (time() - intval($attempt) <= 10)                 $counter++;             else                 session::destroyarray(ajax, $key);         }         return $counter >= 5;     }      public function setattempt()     {         return session::setarray(ajax, time());    }     //ajax methods ...  } 

the problem when open controller such home (haven't construct)

class home extends controller {     public function index(){...} } 

the script initialize sessions in checkattepmt method of ajax class mean method checkattepmt called , session set eg when echo nothing appear !

when print session variable in home controller found session set in ajax controller exists ( clear them in each test ) .

i used debug_backtrace() figure out problem

class ajax extends controller {      public function __construct()     {         parent::__construct(false);         $_session['trace'] = debug_backtrace();     } } 

the result is

[trace] => array         (             [0] => array                 (                     [file] => d:\__path__\application\core\application.php                     [line] => 24                     [function] => __construct                     [class] => ajax                     [object] => __php_incomplete_class object                         (                             [__php_incomplete_class_name] => ajax                         )                      [type] => ->                     [args] => array                         (                         )                  )              [1] => array                 (                     [file] => d:\__path__\public\index.php                     [line] => 15                     [function] => __construct                     [class] => application                     [object] => application object                         (                             [controller:protected] => __php_incomplete_class object                                 (                                     [__php_incomplete_class_name] => ajax                                 )                              [method:protected] => getconfirmmsg                             [params:protected] => array                                 (                                 )                          )                      [type] => ->                     [args] => array                         (                         )                  ) 

what's relation between __php_incomplete_class , problem , how slove ?

i found out problem ! there's jquery ajax requersts fired before click event happen fix .