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一道关于php变量引用的面试题_PHP

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Release： 2016-06-01 12:18:07
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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，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，而后加下一次才会表现出来。

Related labels：
variable reference
source：php.cn
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