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

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