PHP Client Sniffer Class

<?php
/******************************************
** Description   : PHPClientSniffer
** Version       : 1.0.0
** File Name     : PHPClientSniffer.php3
** Author        : Roger Raymond for PHyX8 studios
** Author Email  : [email protected]
** Created       : Wednesday, August 23, 2000
** Last Modified : 
** Modified By   : 
*'
   INFO:
   Returns client information based on HTTP_USER_AGENT

   BASED ON WORKS AND IDEAS BY:   
   Tim Perdue of PHPBuilder.com 
   https://phpbuilder.com/columns/tim20000821.php3
   
   The Ultimate JavaScript Client Sniffer by Netscape.
   http://developer.netscape.com/docs/examples/javascript/NAME_type.html
   
   ========================================================================   
   USAGE:
   ========================================================================
   include("PHPClientSniffer.php3");
   $is = new sniffer;
   ========================================================================
   VARIABLE NAMES    VALUES
   ========================================================================
   $is->UA           The HTTP USER AGENT String
   $is->NAME         Browser Name (Netscape, IE, Opera, iCab, Unknown)
   $is->VERSION      Browser Full Version
   $is->MAJORVER     Browser Major Version 
   $is->MINORVER     Browser Minor Version
   $is->AOL          True/False
   $is->WEBTV        True/False
   $is->JS           Assumed JavaScript Version Supported by Browser
   $is->PLATFORM     System Platform (Win16,Win32,Mac,OS2,Unix)
   $is->OS           System OS (Win98,OS2,Mac68k,linux,bsd,etc...) see code
   $is->IP           REMOTE_ADDR
   
   ========================================================================

 '****************************************/
class sniffer
{  var $UA         =  "";
   var $NAME       =  "Unknown";
   var $VERSION    =  0;
   var $MAJORVER   =  0;
   var $MINORVER   =  0;
   var $AOL        =  false;
   var $WEBTV      =  false;
   var $JS         =  0.0;
   var $PLATFORM   =  "Unknown";
   var $OS         =  "Unknown";
   var $IP         =  "Unknown";

   /* START CONSTRUCTOR */
   function sniffer()
   {  $this->UA = getenv(HTTP_USER_AGENT);
      
      // Determine NAME Name and Version      
      if ( eregi( 'MSIE ([0-9].[0-9a-zA-Z]{1,4})',$this->UA,$info) ||
           eregi( 'Microsoft Internet Explorer ([0-9].[0-9a-zA-Z]{1,4})',$this->UA,$info) ) 
      {  $this->VERSION = $info[1];
         $this->NAME = 'IE';
      } 
      elseif ( eregi( 'Opera ([0-9].[0-9a-zA-Z]{1,4})',$this->UA,$info) ||
               eregi( 'Opera/([0-9].[0-9a-zA-Z]{1,4})',$this->UA,$info) ) 
      {  $this->VERSION = $info[1];
         $this->NAME = 'Opera';
      }
      elseif ( eregi( 'iCab ([0-9].[0-9a-zA-Z]{1,4})',$this->UA,$info) ||
               eregi( 'iCab/([0-9].[0-9a-zA-Z]{1,4})',$this->UA,$info) ) 
      {  $this->VERSION = $info[1];
         $this->NAME = 'iCab';
      } 
      elseif ( eregi( 'Netscape6/([0-9].[0-9a-zA-Z]{1,4})',$this->UA,$info) ) 
      {  $this->VERSION = $info[1];
         $this->NAME = 'Netscape';
      }
      elseif ( eregi( 'Mozilla/([0-9].[0-9a-zA-Z]{1,4})',$this->UA,$info) ) 
      {  $this->VERSION = $info[1];
         $this->NAME = 'Netscape';
      }
      else 
      {  $this->VERSION = 0;
         $this->NAME = 'Unknown';
      }
      
      // Determine if AOL or WEBTV
      if( eregi( 'aol',$this->UA,$info))
      { $this->AOL = true;
      }
      elseif( eregi( 'webtv',$this->UA,$info))
      { $this->WEBTV = true;
      }
      
      // Determine Major and Minor Version
      if($this->VERSION > 0)
      {  $pos = strpos($this->VERSION,".");
         if ($pos > 0)
         {  $this->MAJORVER = substr($this->VERSION,0,$pos);
            $this->MINORVER = substr($this->VERSION,$pos,strlen($this->VERSION));
         }
         else $this->MAJORVER = $this->VERSION; 
      }
      
      // Determine Platform and OS

      // Check for Windows 16-bit
      if( eregi('Win16',$this->UA)           || 
          eregi('windows 3.1',$this->UA)     || 
          eregi('windows 16-bit',$this->UA)  || 
          eregi('16bit',$this->UA))
      {  $this->PLATFORM = "Win16";
         $this->OS = "Win31";
      }

      // Check for Windows 32-bit     
      if(eregi('Win95',$this->UA) || eregi('windows 95',$this->UA)) 
      {  $this->PLATFORM = "Win32"; 
         $this->OS = "Win95"; 
      }
      elseif(eregi('Win98',$this->UA) || eregi('windows 98',$this->UA)) 
      {  $this->PLATFORM = "Win32"; 
         $this->OS = "Win98"; 
      }
      elseif(eregi('WinNT',$this->UA) || eregi('windows NT',$this->UA)) 
      {  $this->PLATFORM = "Win32"; 
         $this->OS = "WinNT"; 
      }
      else
      {  $this->PLATFORM = "Win32"; 
         $this->OS = "Win9xNT"; 
      }
           
      // Check for OS/2
      if( eregi('os/2',$this->UA)            || 
          eregi('ibm-webexplorer',$this->UA))
      {  $this->PLATFORM = "OS2";
         $this->OS = "OS2";  
      }
      
      // Check for Mac 68000
      if( eregi('68k',$this->UA)             || 
          eregi('68000',$this->UA))
      {  $this->PLATFORM = "Mac";  
         $this->OS = "Mac68k";
      }
      
      //Check for Mac PowerPC
      if( eregi('ppc',$this->UA)             || 
          eregi('powerpc',$this->UA))
      {  $this->PLATFORM = "Mac";
         $this->OS = "MacPPC";
      }
      
      // Check for Unix Flavor
      
      //SunOS
      if(eregi('sunos',$this->UA)) 
      {  $this->PLATFORM = "Unix";
         $this->OS = "sun";
      }
      if(eregi('sunos 4',$this->UA)) 
      {  $this->PLATFORM = "Unix";
         $this->OS = "sun4";
      }
      elseif(eregi('sunos 5',$this->UA)) 
      {  $this->PLATFORM = "Unix";
         $this->OS = "sun5";
      }
      elseif(eregi('i86',$this->UA)) 
      {  $this->PLATFORM = "Unix";
         $this->OS = "suni86";
      }
      
      // Irix
      if(eregi('irix',$this->UA))
      {  $this->PLATFORM = "Unix";
         $this->OS = "irix";
      }
      if(eregi('irix 6',$this->UA)) 
      {  $this->PLATFORM = "Unix";
         $this->OS = "irix6";
      }
      elseif(eregi('irix 5',$this->UA)) 
      {  $this->PLATFORM = "Unix";
         $this->OS = "irix5";
      }
      
      //HP-UX
      if(eregi('hp-ux',$this->UA))
      {  $this->PLATFORM = "Unix";
         $this->OS = "hpux";
      }
      if(eregi('hp-ux',$this->UA) && ereg('10.',$this-UA))  
      {  $this->PLATFORM = "Unix";
         $this->OS = "hpux10";
      }
      elseif(eregi('hp-ux',$this->UA) && ereg('09.',$this-UA))  
      {  $this->PLATFORM = "Unix";
         $this->OS = "hpux9";
      }
      
      //AIX
      if(eregi('aix',$this->UA))
      {  $this->PLATFORM = "Unix";
         $this->OS = "aix";
      }
      if(eregi('aix1',$this->UA))
      {  $this->PLATFORM = "Unix";
         $this->OS = "aix1";
      }
      elseif(eregi('aix2',$this->UA))
      {  $this->PLATFORM = "Unix";
         $this->OS = "aix2";
      }
      elseif(eregi('aix3',$this->UA))
      {  $this->PLATFORM = "Unix";
         $this->OS = "aix3";
      }
      elseif(eregi('aix4',$this->UA))
      {  $this->PLATFORM = "Unix";
         $this->OS = "aix4";
      }
      
      // Linux
      if(eregi('inux',$this->UA))
      {  $this->PLATFORM = "Unix";
         $this->OS = "linux";
      }
      
      //Unixware
      if(eregi('unix_system_v',$this->UA))
      {  $this->PLATFORM = "Unix";
         $this->OS = "unixware";
      }
      
      //mpras
      if(eregi('ncr',$this->UA))
      {  $this->PLATFORM = "Unix";
         $this->OS = "mpras";
      }
      
      //Reliant
      if(eregi('reliantunix',$this->UA))
      {  $this->PLATFORM = "Unix";
         $this->OS = "reliant";
      }
      
      // DEC
      if(eregi('dec',$this->UA)           ||  
         eregi('osfl',$this->UA)          || 
         eregi('alphaserver',$this->UA)   || 
         eregi('ultrix',$this->UA)        || 
         eregi('alphastation',$this->UA))
      {  $this->PLATFORM = "Unix";
         $this->OS = "dec";
      }
          
      // Sinix
      if(eregi('sinix',$this->UA))    
      {  $this->PLATFORM = "Unix";
         $this->OS = "sinix";
      }
      
      // FreeBSD
      if(eregi('freebsd',$this->UA))    
      {  $this->PLATFORM = "Unix";
         $this->OS = "freebsd";
      }
      
      // BSD
      if(eregi('bsd',$this->UA))    
      {  $this->PLATFORM = "Unix";
         $this->OS = "bsd";
      }
      
      // VMS
      if(eregi('vax',$this->UA) || eregi('openvms',$this->UA))    
      {  $this->PLATFORM = "Unix";
         $this->OS = "vms";
      }
      
      // SCO
      if(eregi('sco',$this->UA) || eregi('unix_sv',$this->UA))    
      {  $this->PLATFORM = "Unix";
         $this->OS = "sco";
      }
      
      // Assume JavaScript Version
      
      // make the code a bit easier to read
      $ie  = eregi("ie",$this->NAME);
      $ie5 = ( eregi("ie",$this->NAME) && ($this->MAJORVER >= 5) );
      $ie4 = ( eregi("ie",$this->NAME) && ($this->MAJORVER >= 4) );
      $ie3 = ( eregi("ie",$this->NAME) && ($this->MAJORVER >= 3) );
      
      $nav  = eregi("netscape",$this->NAME);
      $nav5 = ( eregi("netscape",$this->NAME) && ($this->MAJORVER >= 5) );
      $nav4 = ( eregi("netscape",$this->NAME) && ($this->MAJORVER >= 4) );
      $nav3 = ( eregi("netscape",$this->NAME) && ($this->MAJORVER >= 3) );
      $nav2 = ( eregi("netscape",$this->NAME) && ($this->MAJORVER >= 2) );
      
      $opera = eregi("opera",$this->NAME);
      
      // do the assumption
      // update as new versions are released
      
      // Provide upward compatibilty
      if($nav && ($this->MAJORVER > 5)) $this->JS = 1.4;
      elseif($ie && ($this->MAJORVER > 5)) $this->JS = 1.3;
      // check existing versions
      elseif($nav5) $this->JS = 1.4;
      elseif(($nav4 && ($this->VERSION > 4.05)) || $ie4) $this->JS = 1.3;
      elseif(($nav4 && ($this->VERSION <= 4.05)) || $ie4) $this->JS = 1.2;
      elseif($nav3 || $opera) $this->JS = 1.1;
      elseif(($nav && ($this->MAJORVER >= 2)) || ($ie && ($this->MAJORVER >=3))) $this->JS = 1.0;
      //no idea
      else $this->JS = 0.0;
      
      // Grab IP Address
      $this->IP = getenv('REMOTE_ADDR');
   }
}
?>