topical media & game development
[] readme course(s) preface I 1 2 II 3 4 III 5 6 7 IV 8 9 10 V 11 12 afterthought(s) appendix reference(s) example(s) resource(s) _

talk show tell print

professional-php-05-class.dog.php / php



  <?php
  class Dog {
    private _onspeak;
  
    public function __construct(name) {
      this->_name = name;
    }
  
    public function bark() {
      if(isset(this->_onspeak)) {
        if(! call_user_func(this->_onspeak)) {
          return false;
        }
      }
     
      print "Woof, woof!";
    }
  
    public function onspeak(functionName, objOrClass = null) {
      if(objOrClass) {
        callback = array(objOrClass, functionName);
      } else {
        callback = functionName;
      }
      
      //make sure this stuff is valid
      if(!is_callable(callback, false, callableName)) {
        throw new Exception("callableName is not callable " . 
                            "as a parameter to onspeak");
        return false;
      }
      
      this->_onspeak = callback;
    }
  }  //end class Dog
  
  //procedural function
  function isEveryoneAwake() {
    if(time() < strtotime("today 8:30am") || 
         time() > strtotime("today 10:30pm")) {
      return false;
    } else {
      return true;
    }
  }
  
  objDog = new Dog('Fido');
  objDog->onspeak('isEveryoneAwake');
  objDog->bark(); //polite dog
  
  objDog2 = new Dog('Cujo');
  objDog2->bark(); //always barks!
  
  //Throws exception when onspeak is called.
  objDog3 = new Dog('Lassie');
  objDog3->onspeak('nonExistentFunction', 'NonExistentClass');
  objDog3->bark();
  ?>
[] readme course(s) preface I 1 2 II 3 4 III 5 6 7 IV 8 9 10 V 11 12 afterthought(s) appendix reference(s) example(s) resource(s) _

(C) Æliens 20/2/2008

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