Novice: PHP array by reference question (by C++ programmer)

["Manish Gupta" <gmanish@xxxxxxxxx>]

I have a class that takes as input, an array by reference and stores it in a 
member variable. A method in this class later modifies the member variable 
(which contains reference to the array). When I access the local variable 
that was passed by reference to the constructor of this class object, I see 
the local variable hasn't changed at all. I think code will describe what 
words may not have:

<?php

class foo
{
   public $_bar;
   public function  __construct(& $bar)
   {
       $this->_bar = $bar;
   }

   function do_your_thing()
   {
       $temp = array(
           'One' => 1,
           'Two' => 2
       );

       $this->_bar[] = $temp;

       echo('from Do_your_thing: ');
       print_r($this->_bar);   // ---------------- [1]
   }
}

$abc = array();
$var = new foo($abc);
$var->do_your_thing();

echo('from main [local variable]: ');
print_r($abc);   // ---------------- [2]

echo('from main: [object member variable] ');
print_r($var->_bar);    // ---------------- [3]
?>

I expected the output from [1], [2] and [3] to be the same. But instead I 
get the following:

from Do_your_thing: Array
(
   [0] => Array
       (
           [One] => 1
           [Two] => 2
       )

)
from main [local variable]: Array
(
)
from main: [object member variable] Array
(
   [0] => Array
       (
           [One] => 1
           [Two] => 2
       )

)

What am I missing? Please help, I'm new to PHP and this is really blocking 
me.

Thanks
M@nish 


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