How can I detect if the user is on localhost in PHP?

Question

In other words, how can I tell if the person using my web application is on the server it resides on? If I remember correctly, PHPMyAdmin does something like this for securi

Answer 1

I found a easy answer.

Because all local drives have C: or D: or F: ... etc.

Just detect if the second character is a :

if ( substr_compare(getcwd(),":",1,1) == 0)
{
echo '';
    $client_or_server = 'client';
}
else
{
echo '';
    $client_or_server = 'server';
}