仅允许从特定网络访问网站

Question

I'm making a website that appeals to students at my school. I want to only allow access if the user is on the campus wifi or hardwire. Using PHP, how can I restrict access to people I am sure are on the campus internet?

Answer 1

You would need to get a range of IP addresses and put them in a while list. You could then use the $_SERVER['REMOTE_ADDR'] variable to check against the white list for access. Do it at the beginning of the page with something like this:

if(in_array($_SERVER['REMOTE_ADDR'],$white_list)) {
  //allow execution code?
} else {
  exit;
}