大牛们美，php新手问几个面试题

大牛们好，php新手问几个面试题

PHP code

1.
$a = 3;
$b = 2;
echo (int)$a/(int)$b

为什么输出是 1.5？


2.
How can you hide the fact that web pages are written in PHP?
a. By using AddType application/X-httpd-php asp
b. Specify all file names without any dot and extension
c. By using .htaccess diretive in Apeche
d. All of the above

3.
解释一下Using Register Globals。