php - Bitwise Operators (And) in PHP. Getting weird answers

Question

So I'm making this script that needs to get the integer from the & operator of two numers in PHP. So far I have managed it to work but with small numbers (<512). When I try to do do for example: echo 65535 $ 2048; I get a result of 0, when it's supposed to be 2048. Any ideas why I am getting this result or how can I get the desired result?. Thank you In advance I'm using PHP 5.5 and Ubuntu.

Answer 1

$不是and运营商，&是。

如果你试试：

echo 65535 & 2048;

你应该会2048好起来的，就像我刚刚在http://sandbox.onlinephpfunctions.com/上所做的那样。

Answer 2

当您尝试运行它时：

echo 65535 $ 2048;

你会得到这个错误：

syntax error, unexpected '$', expecting ',' or ';'

对于我的案例代码：

echo 65535 & 2048;

输出2048

注意：你有错字，应该用 & 代替 $。因为 $ 不是和运算符，而是 & 是。

演示