如何在PHP中将文件夹命名为用户的IP地址

Question

I've searched long and hard for an answer to this question with no luck, hence this question is being asked.

How could I possibly name a folder as the client's IP address? For example:

192.168.0.1 visits my website and I want php to automatically make a folder with the name '192.168.0.1' (I can do the rest such as make a document inside showing logs etc, I just need to know if thats possible).

I've tried using global variables such as the [REMOTE_ADDR] but with no luck, it always shows an error on the webpage.

Answer 1

You can make a directory by using the mkdir() function as follows:

mkdir('path/to/directory')

To find out the user's IP address you can use the 'REMOTE_ADDR' key of the $_SERVER variable:

$_SERVER['REMOTE_ADDR']

Basically this will result in the following code:

$directory_name = $_SERVER['REMOTE_ADDR']
mkdir('path/to/' + $directory_name)

Please note that the received IP from REMOTE_ADDR can't always be trusted. See this answer for more information about the subject.

Answer 2

You can do like this:

1. Get the user ip:

$ip = $_SERVER['REMOTE_ADDR']

2. Make the directory:

mkdir(''.$ip);

example here