Browser Detection

Source ---> http://drupal.org/node/65903

if ( strpos($_SERVER['HTTP_USER_AGENT'], 'Safari') )
{
$browser = 'Safari';
}
else if ( strpos($_SERVER['HTTP_USER_AGENT'], 'Gecko') )
{
if ( strpos($_SERVER['HTTP_USER_AGENT'], 'Netscape') )
{
$browser = 'Netscape (Gecko/Netscape)';
}
else if ( strpos($_SERVER['HTTP_USER_AGENT'], 'Firefox') )
{
$browser = 'Mozilla Firefox (Gecko/Firefox)';
}
else
{
$browser = 'Mozilla (Gecko/Mozilla)';
}
}
else if ( strpos($_SERVER['HTTP_USER_AGENT'], 'MSIE') )
{
$browser = 'Internet Explorer (MSIE/Compatible)';
}
else if ( strpos($_SERVER['HTTP_USER_AGENT'], 'Opera') === true)
{
$browser = 'Opera';
}
else
{
$browser = 'Other browsers';
}

echo $browser;
?>