php判断浏览器类型

if(strpos($_SERVER["HTTP_USER_AGENT"],"MSIE9.0"))

                               $browser= "Internet Explorer 9.0";  

               elseif(strpos($_SERVER["HTTP_USER_AGENT"],"MSIE 8.0"))

                               $browser= "Internet Explorer 8.0";  

               elseif(strpos($_SERVER["HTTP_USER_AGENT"],"MSIE 7.0"))     

                               $browser= "Internet Explorer 7.0";     

               elseif(strpos($_SERVER["HTTP_USER_AGENT"],"MSIE 6.0"))     

                               $browser= "Internet Explorer 6.0";

               elseif(strpos($_SERVER["HTTP_USER_AGENT"],"Firefox/5"))     

                               $browser= "Firefox 5"; 

               elseif(strpos($_SERVER["HTTP_USER_AGENT"],"Firefox/4"))     

                               $browser= "Firefox 4"; 

               elseif(strpos($_SERVER["HTTP_USER_AGENT"],"Firefox/3"))     

                               $browser= "Firefox 3";     

               elseif(strpos($_SERVER["HTTP_USER_AGENT"],"Firefox/2"))     

                               $browser= "Firefox 2";

               elseif(strpos($_SERVER["HTTP_USER_AGENT"],"Chrome"))

                               $browser= "Google Chrome";     

               elseif(strpos($_SERVER["HTTP_USER_AGENT"],"Safari"))     

                               $browser= "Safari";     

               elseif(strpos($_SERVER["HTTP_USER_AGENT"],"Opera"))     

                               $browser= "Opera";     

               else        $browser =  $_SERVER["HTTP_USER_AGENT"];