Recipe 7.6 Assigning Object References
7.6.1 Problem
You want
to link two objects, so when you update one, you also update the
other.
7.6.2 Solution
Use =&
to assign one object to another by reference:
$adam = new user;
$dave =& $adam;
7.6.3 Discussion
When you do an object assignment using =, you
create a new copy of an object. So, modifying one
doesn't alter the other. But when you use
=&, the two objects point at each other, so
any changes made in the first are also made in the second:
$adam = new user;
$adam->load_info('adam');
$dave =& $adam;
$dave->load_info('dave');
The values in $adam are equal to those of
$dave.
7.6.4 See Also
Recipe 7.5 for more on copying object;
documentation on references at
http://www.php.net/references.
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