PHP determines whether the visiting IP address is domestic or foreign

Option 2: Use the IP library to determine the visiting IP address Advantages: Accurate judgment. Disadvantages: The response speed is not as fast as Javascript. You need to reference a PHP IP library: /Files/tianxin2001x/ip.zip

Quote jquery at the head of the website for judgment:

 ...

checkip.php file code:

$userip=$_SERVER['REMOTE_ADDR'];
//Reference the files of the ip library and put all the files in ip.zip in the lib directory
include_once('/lib/ iplimit.class.php');
$iplimit = new iplimit;
if($iplimit->setup($userip))
{
 echo 1;
}
else
{
 echo 2;
}

Both of the above two methods can be used to determine the visiting IP address, choose one and use it.