Extending a Php class which extends another class -

i have requirement process can implemented in 2 different situation. 1 situation start date cannot in past , other can.

currently utilise value objects perform series of validation items on each field submitted using zend validate objects.

the validation extends base class e.g.

class valueobject_test1 extends filter()

filter made of: -

class filter {     protected $_filter;     protected $_filterrules = array();     protected $_validatorrules = array();     protected $_data = array();     protected $_objdata = array();     protected $_options = array(zend_filter_input::escape_filter => 'striptags');     protected $_runvalidation = true;     protected function _setfilter()     protected function _addfilter()     protected function _addvalidator()     protected function _adddata()     protected function _addobject()     protected function _addoption()     public function getdata()        public function haserrors()     public function getmessages()     public function getvalidationstate()     public function __get()      public function __isset()     public function __set() } 

valueobject_test1 made of:

class valueobject_test1 extends filter {         public function __construct($testvar) {         $this->_setdata(testvar);                $this->_setfilters();         $this->_setvalidators();                 if($this->_runvalidation) {             $this->_setfilter();         }            }        protected function _setfilters(){         $this->_addfilter("*", "stringtrim");     }        protected function _setdata($testvar) {              $this->_adddata('testvar', $testvar);            }        protected function _setvalidators() {                $this->_addvalidator('testvar', array(new zend_validate(), 'presence'=>'required', 'messages'=>'enter something'));     }    } 

what i'm trying achieve extension of valueobject_test1 second situation have additional validation item items in valueobject_test1()

i've written following second situation:-

<?php  class valueobject_test2 extends valueobject_test1 {      public function __construct($testvar, $testvar2) {         $this->_setdata($testvar, $testvar2);                $this->_setfilters();         $this->_setvalidators();                 if($this->_runvalidation) {             $this->_setfilter();         }            }        protected function _setfilters(){         $this->_addfilter("*", "stringtrim");     }        protected function _setdata($testvar, $testvar2) {           $this->_adddata('testvar', $testvar);            $this->_adddata('testvar2', $testvar2);          }     protected function _setvalidators() {                $this->_addvalidator('testvar2', array(new zend_validate(), 'presence'=>'required', 'messages'=>'enter something'));     } } 

the issue i'm having output appears validate second situation validation , nothing on second. i'm under impression setting both variables in _setdata() validation should occur items in valueobject_test1 , items in valueobject_test2?

class valueobject_test2 extends valueobject_test1 {      public function __construct($testvar, $testvar2) {         $this->_setdata($testvar, $testvar2);                parent::__construct($testvar);     }        // _setfilters identical parent implementation     protected function _setdata($testvar, $testvar2) {           $this->_adddata('testvar2', $testvar2);         parent::_setdata($testvar);     }     protected function _setvalidators() {                $this->_addvalidator('testvar2', array(new zend_validate(), 'presence'=>'required', 'messages'=>'enter something'));         parent::_setvalidators();     } } 

my code doesn't call _setdata correctly because $this->setdata(testvar) inside parent::_construct's call $this->_setdata(testvar) version of function.

if want override function, override want also run logic of parent.

<?php class foo {     protected function _setfoobar() {                // foo logic     } }  class bar extends foo {     protected function _setfoobar() {                // custom bar logic specific child class (bar)         parent::_setfoobar();     } }