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Date: Mon, 24 Jul 2006 17:52:38 +0200
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Subject: Pass by reference (5.1.1 vs 5.1.2)
From: rishad@kaluma.com (Rishad Omar)

Hello,

I've upgraded from 5.1.1 to 5.1.2 and discovered the following 
unexpected difference. Best shown by example.

<?
    function getArray(&$arr)
    {
        $arr[] = 12;
    }

    getArray($p = array());
    print_r($p);
?>

In php 5.1.1, the $p is passed correctly as reference and so returns 
with the value 12 in its first element. I regard this as correct behaviour.
In php 5.1.2, the $p is passed by value. So on return, $p is still empty!
This can be fixed as follows:
    $p = array();
    getArray($p);



The following example works, as expected, in both 5.1.1 and 5.1.2.

<?
class A
{
        public $i = 9;
}


function doAmend(A &$a) // & not required because class instance passed 
by reference by default
{
        $a->i += 30;
}

        doAmend($b = new A);
        print_r($b);      // this prints the value of member i as 39 as 
expected.

?>