Example #4 对象赋值



<?php

$instance = new SimpleClass();

$assigned = $instance;
$reference =& $instance;

$instance->var = '$assigned will have this value';

$instance = null; // $instance and $reference become null

var_dump($instance);
var_dump($reference);
var_dump($assigned);
?>


以上例程会输出：


NULL
NULL
object(SimpleClass)#1 (1) {
["var"]=>
string(30) "$assigned will have this value"
}