I wrote a PHP/Javascript webpage to find user info. Take a look and tell me what else I should add.

The script on my server: http://www.irongeek.com/browserinfo.php

Source:

PHP Code:
<HTML>
&
lt;BODY>
&
lt;TITLE>Irongeek's Browser Information Page</TITLE>


<? include ("http://irongeek.com/header.htm"); ?>
<B>Irongeek'
s Browser Information Page</B><P>
Here is some of the information your browser currently puts out.<P>

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lt;B>Info obtained by PHP on the server:</B><P>
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lt;TABLE cellpadding="5" width="65%" align="center">
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lt;? 
table_print ("IP",$_SERVER['REMOTE_ADDR']);
$hostname=gethostbyaddr($_SERVER['REMOTE_ADDR']);
table_print ("Hostname",$hostname);
table_print ("Operating System",find_os());
table_print ("Entire User Agent String",$_SERVER['HTTP_USER_AGENT']);
table_print ("Referrer",$_SERVER['HTTP_REFERER']);
table_print ("Remote Client Port:",$_SERVER['REMOTE_PORT']);
?&
gt;
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lt;/TABLE>



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lt;B>Info obtained by JavaScript on the client:</B><P>


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lt;script language="javascript" type="text/javascript">
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lt;!--

document.write('<TABLE cellpadding="5"  width="65%" align="center">');

JSTable_print("Java Enabled",navigator.javaEnabled());
//JSTable_print("IP", java.net.InetAddress.getLocalHost().getHostAddress());

JSTable_print("Browser",navigator.appName);
JSTable_print("Browser Version",navigator.appVersion);
JSTable_print("Platform",navigator.platform);
JSTable_print("CPU Class",navigator.cpuClass);

var 
tp="";
if (
navigator.appName=="Netscape"){
    var 
tdes="Plugins";
    for (
i in navigator.plugins)
    {
        if (
tp!=navigator.plugins[i].name){
             
JSTable_print(tdes,navigator.plugins[i].name);
            
tdes="";
        }
    
tp=navigator.plugins[i].name;
    }
}

JSTable_print("System Language",navigator.systemLanguage);

JSTable_print("Resolution",screen.width+"x"+screen.height);
JSTable_print("Color Depth",screen.colorDepth);
JSTable_print("Referrer",document.referrer);

document.write("</TABLE>");


function 
JSTable_print(description,value

document.write('<TR><TD><FONT color="#990099">' description '</FONT></TD><TD>' value '</TD></TR>');

// -->
</script&gt



&
lt;? //PHP Functions
function table_print($description$value){

    echo 
'<TR><TD><FONT color="#990099">'.$description.'</FONT></TD><TD>'.$value.'</TD></TR>';

}


    function 
find_os()

    {

    
$browserarray=explode("; ",$_SERVER['HTTP_USER_AGENT']);

    
$os$browserarray[2]; 

    return 
$os;

    }
    function 
find_browser()

    {

    
$browserarray=explode("; ",$_SERVER['HTTP_USER_AGENT']);

    if (
$browserarray[1]=="U"){

    
$browser $browserarray[4];

    }else {

    
$browser $browserarray[1];

    }

    return 
$browser;

    }

?&
gt;


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lt;? include ("http://irongeek.com/footer.php"); ?>
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lt;/BODY>
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lt;/HTML&gt