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Homephp教程php手册一道关于php变量引用的面试题

当一个变量等于另一个变量的引用的时候,这时任何一方改变了其值,另一方看到的这个值也会变化的。前加本次就表现出来,而后加下一次才会表现出来。

php面试题题目如下:

复制代码 代码如下:


$a = 1;
$x =&$a;
$b=$a++;
?>


问:
$b和$x的值分别是什么?

php面试题的答案如下:
$b = 1;
$x = 2;

明白了吗? 没明白,香港虚拟主机,再好好想想。 当一个变量等于另一个变量的引用的时候,这时任何一方改变了其值,另一方看到的这个值也会变化的。前加本次就表现出来,香港服务器,而后加下一次才会表现出来。 ,香港服务器
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