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<?php
/*
** $Id$
**
** ITools - the Internet Tools Library
**
** Copyright (C) 1995-2003 by the ITools Authors.
** This program is free software; you can redistribute it and/or
** modify it under the terms of either the GNU General Public License
** or the GNU Lesser General Public License, as published by the Free
** Software Foundation. See http://www.gnu.org/licenses/ for details.
**
** Class it_Browser: Browser capability class
** For a good list see http://www.msb.edu/dept/msbtc/waehner/browser/
**
** Inspired by browser.pinc,v 1.1.1.1 1999/03/23 14:51:39 bobak Exp
*/
/**
* Browser capabilities class
* var $Type string: Browser type, "Netscape", "MSIE", "Konqueror", "Opera", "Safari", "Gecko" etc.
* var $Version float: Browser-Version x.y for all brands
* var $Platform string: "Win95", "Macintosh", "Linux" ... may be wrong
* var $Language string: Browser's language, "de", "en", ... or unset
* var $HTMLVersion float: Suported HTML version x.y
* var $JavaScript bool: Browser supports Javascript
* var $CSS bool: Browser supports Style sheets
* var $TextOnly bool: Browser supports only text, no graphics
*/
class it_browser
{
/* Generic attributes */
var $UserAgent; /* string: Unparsed HTTP_USER_AGENT */
var $Type = ''; /* string: Browser type, "Netscape", "MSIE", etc. */
var $Version; /* float: Browser-Version x.y for all brands */
var $Platform; /* string: "Win95", "Macintosh", "Linux" ... may be wrong */
var $Language; /* string: Browser's language, "de", "en", ... or unset */
var $HTMLVersion=0; /* float: Suported HTML version x.y */
var $JavaScript=0; /* bool: Browser supports Javascript */
var $CSS=1; /* int: Style sheet level (0..3) */
var $CSSFilter=0; /* bool: Is MSIE and supports CSS filter: property */
var $TextOnly=0; /* bool: Browser supports only text, no graphics */
var $VML=0; /* bool: Browser support VectorMarkupLanguage */
var $Canvas=0; /* bool: Supports Canvas */
var $XMLHTTP=0; /* bool: Browser supports XMLHTTP requests */
/* Browser specific stuff (DEPRECATED, use generic attributes above) */
var $MSIE; /* float: Microsoft Internet Explorer Version or 0 */
var $NS; /* float: Netscape Navigator Version or 0 */
/**
* Constructor: Initializes public fields with browser capabilities
*/
function it_browser()
{
$this->UserAgent = $_SERVER['HTTP_USER_AGENT'];
/* $this->UserAgent = "Mozilla/4.0 [de] (compatible; MSIE 5.0; Bill Gates 1.0; Windows 95)"; */
/* Find "Mozilla/4.0" */
if (ereg("([^/]*)/([^ ]*)", $this->UserAgent, $regs))
{
$this->Type = $regs[1];
$this->Version = (double)$regs[2];
}
/* Find optional "(compatible; MSIE 3.0; Win95)" */
if (preg_match("/\((.+)\)/U", $this->UserAgent, $regs))
{
$optattr = preg_split("/;\s+/", $regs[1]);
if ($optattr[0] == "compatible")
{
if (ereg("([^/]*)[/ ]([^/]*)", $optattr[1], $regs))
{
$this->Type = $regs[1];
$this->Version = (double)$regs[2];
}
else
$this->Type = $optattr[1];
$this->Platform = $optattr[count($optattr)-1];
}
else
$this->Platform = $optattr[0];
for ($i=1; $i < count($optattr); $i++)
{
if (preg_match("/^([a-z]{2})(\-[a-z]{2})?$/i", $optattr[$i], $regs))
$this->Language = $regs[1];
if (preg_match("/^rv:([0-9\.]+)/", $optattr[$i], $regs))
$this->Version = floatval($regs[1]);
if (strstr($optattr[$i], "Linux") || $optattr[$i] == "X11")
$this->Platform = "Linux";
}
}
/* Find optional "[de]" */
if (!$this->Language && ereg("\[(.*)\]", $this->UserAgent, $regs))
$this->Language = $regs[1];
/* Check for Safari/KHTML */
if (preg_match("/(Safari|AppleWebKit)\/([0-9\.]+)/", $this->UserAgent, $regs))
{
$this->Type = "Safari";
$this->Version = floatval($regs[2]);
}
/* Check for Gecko based browser */
if ($this->Type == "Mozilla" && preg_match("/[^a-z]Gecko[^a-z]/", $this->UserAgent))
$this->Type = "Gecko";
else if ($this->Type == "Mozilla" && $this->Version < 5)
$this->Type = "Netscape";
/* And now for the browser capabilities ... */
if ($this->Type == "MSIE")
{
$this->MSIE = $this->Version;
$this->HTMLVersion = 4.0;
$this->JavaScript = true;
$this->VML = ($this->Version >= 5.5);
$this->XMLHTTP = ($this->Version >= 5);
$this->CSS = $this->Version >= 4.0 ? 2 : 1;
$this->CSSFilter = ($this->Version >= 5.0);
}
else if ($this->Type == "Opera")
{
$this->Opera = $this->Version;
if ($this->Version >= 3.5)
{
$this->HTMLVersion = 4.0;
$this->CSS = 2;
}
else
{
$this->HTMLVersion = 3.2;
$this->CSS = 1;
}
$this->JavaScript = true;
$this->XMLHTTP = ($this->Version >= 8);
}
else if ($this->Type == "Konqueror")
{
$this->HTMLVersion = 4.0;
$this->CSS = 2;
$this->JavaScript = true;
$this->XMLHTTP = ($this->Version >= 3);
}
else if ($this->Type == "Netscape")
{
$this->NS = $this->Version;
$this->HTMLVersion = 4.0;
$this->JavaScript = true;
if ($this->Version >= 5.0)
$this->CSS = 2;
}
else if ($this->Type == "Gecko")
{
$this->HTMLVersion = 4.0;
$this->CSS = 2;
$this->JavaScript = true;
$this->XMLHTTP = true;
$this->Canvas = ($this->Version >= 1.8);
}
else if ($this->Type == "Safari")
{
$this->HTMLVersion = 4.0;
$this->JavaScript = true;
$this->CSS = 2;
$this->XMLHTTP = true;
$this->Canvas = ($this->Version >= 418);
}
else if ($this->Type == "Lynx")
$this->TextOnly = 1;
}
} /* End Class it_Browser */
?>
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