$foo = 'Bob'; // 将 'Bob' 赋给 $foo
$bar = &$foo; // 通过 $bar 引用 $foo
echo $foo.'
';
$bar = "My name is $bar"; // 修改 $bar 变量
echo $bar.'
';
echo $foo.'
'; // $foo 的值也被修改
?>
输出:
Bob
My name is Bob
My name is Bob
我们看到原始值确实被修改了,发生在引用之后并被赋值之后,但被赋值之前则原始变量不会改变
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