---------- Forwarded message ----------
From: Louis Huppenbauer <louis.huppenbauer@xxxxxxxxx>
Date: 2011/10/31
Subject: Re: Novice: PHP array by reference question (by C++
programmer)
To: Manish Gupta <gmanish@xxxxxxxxx>
You have to assign the value by reference too
public function __construct(& $bar)
{
$this->_bar = &$bar;
}
2011/10/31 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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