TemuriI wrote:
> Hi all, here is the code I am having problem with:
>
> ============================================
>
> class baseForm {
> private $_id = 10;
>
> function __get($member)
> {
> echo "Accessing member \"{$member}\" : <br />\n";
> return $this->$member;
> }
> function checkID()
> {
> echo $this->_id."<br />\n";
here you are accessing a private member variable that does exist,
hence __get() is not triggered by checkID().
make the $_id var protected and you should see that __get() is not
triggered for the subclasses' display() method either.
> }
> }
> class inputText extends baseForm
> {
> function display()
> {
> $this->checkID();
> echo $this->_id."<br />\n";
> }
> }
> $f = new inputText();
> echo $f -> display();
>
>
> ============================================
>
>
> The question is: why the string 'Accessing member "_id" :' is only
> displayed once? If you look at the code - it actually accesses $_id
> member TWICE. But __get() gets gets triggered only once. WHY?!!
>
> From what I see, the __get() accessor function is triggerred only from
> OUTSIDE the class.
you see correct! but [I think] fail to see that there is a difference
between properties that actually exist and properties that don't....
class A {
private $props = array("_id" => 1);
function testA() { echo $this->_id,"\n"; }
function __get($m) {
echo "Accessing member \"{$m}\" : \n";
if (isset($this->props[$m])) echo $this->props[$m];
}
}
class B extends A {
function testB() {
$this->testA();
echo $this->_id,"\n";
}
}
$b = new B; $b->testB();
>
> PHP Version 5.1.6, installed on Win32 (unfortunately).
>
> Thank you in advance,
> Temuri
>
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