php获取用户浏览器版本的方法

function getbrowse()
{
?$agent = $_server['http_user_agent'];
?$browser = '';
?$browserver = '';
?$browser = array('lynx','mosaic','aol','opera','java','macweb','webexplorer','omniweb');
?for($i = 0; $i <= 7; $i ++){
??if(strpos($agent,$browsers[$i])){
???$browser = $browsers[$i];
???$browserver = '';
??}
?}
?if(ereg('mozilla',$agent) && !ereg('msie',$agent)){
??$temp = explode('(',$agent);
??$part = $temp[0];
??$temp = explode('/',$part);
??$browserver = $temp[1];
??$temp = explode(' ',$browserver);
??$browserver = $temp[0];
??$browserver = preg_replace('/([d.]+)/','1',$browserver);
??$browserver = $browserver;
??$browser = 'netscape navigator';
?}
?if(ereg('mozilla',$agent) && ereg('opera',$agent)) {
??$temp = explode('(',$agent);
??$part = $temp[1];
??$temp = explode(')',$browserver);
??$browserver = $temp[2];
??$browserver = preg_replace('/([d.]+)/',$browserver);
??$browserver = $browserver;
??$browser = 'opera';
?}
?if(ereg('mozilla',$agent) && ereg('msie',$agent);
??$part = $temp[1];
??$temp = explode(';',$part);
??$part = $temp[1];
??$temp = explode(' ',$part);
??$browserver = $temp[2];
??$browserver = preg_replace('/([d.]+)/',$browserver);
??$browserver = $browserver;
??$browser = 'internet explorer';
?}
?if($browser != ''){
??$browseinfo = $browser.' '.$browserver;
?} else {
??$browseinfo = false;
?}
?return $browseinfo;
}
//应用办法

PHP教程//在ie中
echo getbrowse(); //internet explorer 6.0
//在firefox中
echo getbrowse() ;//netscape navigator 5.0