This is a browser detect script by Chris Schuld.

I have used this script on the RiAus mainsite developed with canvas.

First of all- download the browser.php script and save to a directory  within your website.

Now you can include the script with a statement such as this:

<!--?php
//Browser detection and variable creation
require_once('includes/browser.php');
global $browser;
$browser = new Browser();
 	if( $browser--->getBrowser() == Browser::BROWSER_FIREFOX && $browser->getVersion() >= 3 ) {
		//echo "<!--Firefox version 3 or greater detected-->";
	}
	elseif( $browser->getBrowser() == Browser::BROWSER_IE  && $browser->getVersion() >= 8 ){
		//echo "<!--Internet Explorer version 8 or greater detected-->";
	}
	else {
		echo 'Something Else.';
	}

?>

Here are the current set of identifiers:

This solution identifies the following Operating Systems:

• Windows (Browser::PLATFORM_WINDOWS)
• Windows CE (Browser::PLATFORM_WINDOWS_CE)
• Apple (Browser::PLATFORM_APPLE)
• Linux (Browser::PLATFORM_LINUX)
• Android (Browser::PLATFORM_ANDROID)
• OS/2 (Browser::PLATFORM_OS2)
• BeOS (Browser::PLATFORM_BEOS)
• iPhone (Browser::PLATFORM_IPHONE)
• iPod (Browser::PLATFORM_IPOD)
• BlackBerry (Browser::PLATFORM_BLACKBERRY)
• FreeBSD (Browser::PLATFORM_FREEBSD)
• OpenBSD (Browser::PLATFORM_OPENBSD)
• NetBSD (Browser::PLATFORM_NETBSD)
• SunOS (Browser::PLATFORM_SUNOS)
• OpenSolaris (Browser::PLATFORM_OPENSOLARIS)
• iPad (Browser::PLATFORM_IPAD)

This solution identifies the following Browsers and does a best-guess on the version:

• Opera (Browser::BROWSER_OPERA)
• WebTV (Browser::BROWSER_WEBTV)
• NetPositive (Browser::BROWSER_NETPOSITIVE)
• Internet Explorer (Browser::BROWSER_IE)
• Pocket Internet Explorer (Browser::BROWSER_POCKET_IE)
• Galeon (Browser::BROWSER_GALEON)
• Konqueror (Browser::BROWSER_KONQUEROR)
• iCab (Browser::BROWSER_ICAB)
• OmniWeb (Browser::BROWSER_OMNIWEB)
• Phoenix (Browser::BROWSER_PHOENIX)
• Firebird (Browser::BROWSER_FIREBIRD)
• Firefox (Browser::BROWSER_FIREFOX)
• Mozilla (Browser::BROWSER_MOZILLA)
• Amaya (Browser::BROWSER_AMAYA)
• Lynx (Browser::BROWSER_LYNX)
• Safari (Browser::BROWSER_SAFARI)
• iPhone (Browser::BROWSER_IPHONE)
• iPod (Browser::BROWSER_IPOD)
• Google’s Android(Browser::BROWSER_ANDROID)
• Google’s Chrome(Browser::BROWSER_CHROME)
• GoogleBot(Browser::BROWSER_GOOGLEBOT)
• Yahoo!’s Slurp(Browser::BROWSER_SLURP)
• W3C’s Validator(Browser::BROWSER_W3CVALIDATOR)
• BlackBerry(Browser::BROWSER_BLACKBERRY)