这样的PHP题目你能准确说出答案吗？

1. 
$a = "hello"; 
$b = &$a; 
unset($b); 
$b = "world"; 
what is $a? 

2. 
$a = 1; 
$x = &$a; 
$b = $a++; 
what is $b? 

 

转载于:https://www.cnblogs.com/picaso/archive/2013/04/26/3045294.html