NYCPHP Meetup

[Daniel Krook]

Actually, the key to the whole thing  (also from Adam's book, pp 261-263) 
is to define what values are acceptable as properties in the constructor. 
In this example only valOne and valTwo can be set and get:

class Runner {
 
        private $data;
 
        public function __construct($runner = null) {
                $this->data     = array(
                        'valOne' => 0,
                        'valTwo' => ''
                );
                if (is_array($runner)) {
                        foreach ($runner as $field => $value) {
                                $this->$field = $value;
                        }
                }
        }
 
        public function __set($property, $value) {
                if (isset($this->data[$property])) {
                        $this->data[$property] = $value;
                }
        }
 
        public function __get($property) {
                if (isset($this->data[$property])) {
                        return $this->data[$property];
                } else {
                        return false;
                }
        }
}

talk-bounces at lists.nyphp.org wrote on 04/19/2005 10:01:26 PM:

> __set and __get are magic methods that are called only when the
> properties are not defined in the class, thus, this works:
> 
>   class Runner  {
> 
>        public function __get($property){
>                return $this->$property;
>        }
> 
>        public function __set($property, $value){
>                $this->$property = $value;
>        }
> 
>   }
> 
> though I believe this is better (pg 39 - Upgrading to PHP5 - how's
> that for a plug Adam?):
> 
>   class Runner  {
>        private $data;
> 
>        public function __get($property){
>                if (isset($this->data[$property])){
>                  return $this->data[$property];
>                } else return false;
>        }
> 
>        public function __set($property, $value){
>                $this->data[$property] = $value;
>        }
> }
> 
> 
> Why?  My guess is because you're able to define your data as private
> via the array...however, I would be interested to know here from
> someone who knows for certain.
> 
> 
> On 4/19/05, Alex C <alexchan.1976 at gmail.com> wrote:
> > I am trying to use __set and __get magic methods to access private
> > properties of a class. However , I keep on getting this error. I am
> > using PHP 5.03..
> > 
> > Fatal error: Cannot access private property Runner::$programName
> > 
> > I am not sure what I am doing wrong..  thanks in advance
> > 
> > my class looks as follows.
> > ---
> > 
> >   class Runner  {
> >         private $programName;
> >         private $programDate;
> >         private $raceNumber;
> >         private $runnerNumber;
> > 
> >         private $scratchedStatus;
> > 
> >         public function __get($property){
> >                 return $this->$property;
> >         }
> > 
> >         public function __set($property, $value){
> >                 $this->$property = $value;
> >         }
> > }
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> > 
> 
> 
> -- 
> 
> "When you do things right, people won't be sure you've done anything at 
all."
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