PHP samples howto assemble web related log items

/*********************************************/
/* USER log items                            */
/*********************************************/

// get IP-adress
$user1 = $_SERVER['REMOTE_ADDR'];

// get Internet host name corresponding to a given IP address
$user2 = gethostbyaddr($_SERVER['REMOTE_ADDR']);
// alt. if server configuration allows
$user2 = $_SERVER['REMOTE_HOST'];


/*********************************************/
/* ORGANISATION log items                    */
/*********************************************/

// geolocate ip-adresses, using hostip.info, experimental
// please visit http://www.hostip.info/use.html
/*
http://api.hostip.info/get_html.php?ip=12.215.42.19
  Country: UNITED STATES (US)
  City: Sugar Grove, IL
*/
$url               = 'http://api.hostip.info/get_html.php?ip=';
$lines             = file( $url.$_SERVER['REMOTE_ADDR'] );
$country           = split( ':', $lines[0], 2 );
$organisation      = trim( $country[1] );
$city              = split( ':', $lines[1], 2 );
$organisation_spec = trim( $city[1] );


/*********************************************/
/* CLIENT log items                          */
/*********************************************/

// get user web client
$client = $_SERVER[''HTTP_USER_AGENT'];

// alt. PHP command 'get_browser', look it up!
$clientinfo  = get_browser( null, TRUE );
$client      = $clientinfo['browser'].' '.$clientinfo['version'];
$client_spec = $clientinfo['platform'];