Posted by Robert Cummings on 11/09/08 11:19

On Thu, 2005-06-23 at 13:36, Matthew Weier O'Phinney wrote:
> * Robert Cummings <robert@interjinn.com> :
> > On Thu, 2005-06-23 at 11:32, Matthew Weier O'Phinney wrote:
> > > The above notation is unnecessary when developing in PHP5, as objects in
> > > PHP5 are passed by reference by default. However, in PHP4, this was
> >
> > Not entirely, there's still a subtle difference in PHP5 between
> > assigning an object with = versus assigning with = &.
>
> Would you mind explaining the difference? I've seen nothing in the docs,
> to indicate that assigning objects with =& in PHP5 is necessary, or even
> desired. My experience with PHP5 hasn't shown this either. I'd be
> interested to know to what you refer.

See for yourself when running the following script:

<?php

class a
{
}

class b
{
}

$aObj = new a();
$bObj = new b();

$foo1 = $aObj;
$foo2 = $aObj;
$foo3 = $foo1;
$foo4 = &$foo2;

echo "------------------\n";
print_r( $foo1 );
print_r( $foo2 );
print_r( $foo3 );
print_r( $foo4 );

$foo1 = $bObj;
$foo2 = $bObj;

echo "------------------\n";
print_r( $foo1 );
print_r( $foo2 );
print_r( $foo3 );
print_r( $foo4 );

$foo1 = &$aObj;
?>

Cheers,
Rob.
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