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Retrieve local IP address in PHP

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chenille36 Posted messages 10 Status Member -  
jordane45 Posted messages 30426 Registration date   Status Moderator Last intervention   -
Hello,

I’d like to know how to display the local IP address and determine whether it is static or dynamic.

The context is that I’m programming an intranet app that retrieves user information and redirects based on that information.

Thank you.

4 answers

Answer 1 / 4
jordane45 Posted messages 30426 Registration date   Status Moderator Last intervention   4 830
 
Hello, To retrieve an IP there aren’t 36 solutions... 
 <?php /** 
 * Retrieve the real IP address of a visitor 
 */ 
function get_ip() { 
    // IP if shared internet
    if (isset($_SERVER['HTTP_CLIENT_IP'])) { 
        return $_SERVER['HTTP_CLIENT_IP']; 
    } 
    // IP behind a proxy
    elseif (isset($_SERVER['HTTP_X_FORWARDED_FOR'])) { 
        return $_SERVER['HTTP_X_FORWARDED_FOR']; 
    } 
    // Otherwise: normal IP
    else { 
        return (isset($_SERVER['REMOTE_ADDR']) ? $_SERVER['REMOTE_ADDR'] : ''); 
    } 
} 
?>
but regarding whether it is dynamic or static... I don’t know any way to determine it. (apart possibly, comparing the user’s IP on each visit to see if it matches the previous one... assuming they don’t change computers to connect...) -- Best regards, Jordane
1
Answer 2 / 4
chenille36 Posted messages 10 Status Member
 
okay thanks.

But I found this function 

gethostbyname(gethostname());


but to determine if it’s static or not, not yet.
0
jordane45 Posted messages 30426 Registration date   Status Moderator Last intervention   4 830
 
This is the server's IP... not the users'
0
chenille36 Posted messages 10 Status Member
 
I understand.
0
Answer 3 / 4
chenille36 Posted messages 10 Status Member
 
Trying the code you gave me, it returns this result

::1
0
jordane45 Posted messages 30426 Registration date   Status Moderator Last intervention   4 830
 
It corresponds to the IP of the machine in "local" (in IPv6)
Equivalent to the IP: 127.0.0.1 in IPv4
Which makes me think that you are running your script from the same PC where your web "server" is located.
0
chenille36 Posted messages 10 Status Member
 
indeed for the tests.
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Answer 4 / 4
chenille36 Posted messages 10 Status Member
 
9a doesn't work; I only get the IP address.
0
jordane45 Posted messages 30426 Registration date   Status Moderator Last intervention   4 830
 
Well yes... What else did you expect to get?
0