[PHP] Strange problem in class creation

[Fabio Rotondo]

Hi all,

I have encountered a "tricky" problem with PHP 4.3.1 (installed with 
SuSE 8.2).
I don't know if it is a bug or not. Maybe is just me missing something.

What I'd like to do is to pass a reference of "base_class" instance to the
constructor of "second_class" (so that the newly created "second_class" 
instance can
call methods from the "base_class" instance.
It seems that if "base_class" constructor directly calls its method 
"create()" (that is
responsible of creating the "second_class" instance, passing _$this_ as 
constructor
argument) the second_class gets a "copy" of "base_class" instance and 
not the real thing.

To test it, I have added an array ($arr) in the base_class and set a 
value into it.
If "second_class" really have a reference to the "real" base_class 
instance, it should be
able to print its contents, but this just doesn't work.

Please, notice that if in the following code you remove the line 
"$this->create()"
in the base_class constructor and add the commented line in the main 
body, everything
works fine.

What I am really missing?

Please, help!

Ciao,

  Fabio

---- CODE STARTS HERE ------------------------------------------
<?php
class base_class
{
        var $arr;
        var $class;
        function base_class ()
        {
                $this->arr = array ();
                $this->class = false;
                // it seems to create another "instance" of base_class
                $this->create ();               // this line does not work
        }
        function set ( $val )
        {
                $this->arr []  = $val;
        }
        function create ()
        {
                $this->class = new second_class ( $this );
        }
        function test ()
        {
                $this->class->dump ();
        }
}
class second_class
{
        function second_class ( & $main_class )
        {
                $this->main_class = & $main_class;
        }
        function dump ()
        {
                print_r ( $this->main_class->arr );
        }
}
$b = new base_class ();
// $b->create ();               // This line works as expected
$b->set ( "ciao" );
$b->test ();
print "<br />";
print_r ( $b->arr );
?>
---- END CODE ---------------------------------------------
--
PHP General Mailing List (http://www.php.net/)
To unsubscribe, visit: http://www.php.net/unsub.php