Code-Bin #66 - get_client

get_client_connects()
Posted by: TRUSTAbyss | August 4, 2008 @ 4:09pm

Revision 4 - Original post on December 11, 2007 @ 11:24pm

PHP Code

<pre>
<?php
/**
 * get_client_connects() Function
 * Created by: Joshua H. (TRUSTAbyss)
 *
 * Usage: get_client_connects(PORT) will output an integer value
 * based on the number of connections to the server. This function
 * accepts an optional IP argument that can be used to show how
 * many connections a single client has made.
 *
 * Note: The number of connections is based on the server's timeout;
 * if you're server has a timeout of 15, a client connection will remain
 * active until 15 seconds of inactivity.
 *
 * This function requires access to the exec() function and netstat
 * command in order for it to work.
 */

function get_client_connects($port, $ip = '[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}')
{
    $connects = 0; // Initialize the $connects variable.

// Run the netstat command and output the contents to an array.
    exec("netstat -n", $array);
   
    // Create the pattern that will be used to match the number of clients connected.
    $pattern = "([0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}[.:]{$port}[ ]+{$ip}[.:][0-9]+)[ ]+ESTABLISHED";
   
    foreach ($array as $string) // Loop through the array.
    {
        if (preg_match("/$pattern/i", $string)) 
        {
            $connects++; // Increase the number of connects by one.
        }
    }
    
    // Output the number of connections made.
    return $connects;
}

// Lets display the number of connections from the current user on port 80.
echo get_client_connects(80, $_SERVER['REMOTE_ADDR']).' Connection(s) From '.$_SERVER['REMOTE_ADDR']."\n";

// Lets display all connections on port 80!
echo get_client_connects(80).' Connection(s) From Total';
?>
</pre>

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Author Comments

This function will output an integer value based on the number of connections to your server. Since this function allows you to look up any port, you can see how many clients are connected to any type of server! FTP, HTTP, SMTP etc. Enjoy!

Note: This function was tested on Windows, Linux, and Mac OS X.

Rating

4.55 / 8
290 Votes