ユーザーエージェントのバージョンを検出する

检测注流浏览器及びそのバージョン

define('IE', 1);
define('FIREFOX', 2);
define('CHROME', 3);
define('OPERA', 4);
 class UserAgentDetect
{
 static $version = array();

 static $userAgent = '';

 static function getUserAgent()
 {
 $header = getallheaders();
 self :: $userAgent = $header['ユーザーエージェント'];
 }
関数 findUserAgentByKey($ua, $key)
 {
 $len = strlen($key);
 $start = strpos($ua, $key);

 $pos = strpos( $ua, ' ', $start + $len + 1);

 return substr($ua, $start + $len, $pos - $len - $start);
 }
 静的関数 detectUserAgent()
 {
 self :: getUserAgent();

 if (strpos(self :: $userAgent, 'MSIE') != null)
 {
 self :: $version[] = IE;
 self :: $version[] =self :: findUserAgentByKey(self :: $userAgent, 'MSIE');
 }
 else if (strpos(self :: $userAgent, 'Gecko/') != null)
 {

 self :: $version[] = FIREFOX;
 self :: $version[] =self:: findUserAgentByKey(self :: $userAgent, 'Firefox/');
 }
 else if (strpos(self :: $userAgent, 'AppleWebKit/') != null )
 {
 self :: $version[] = CHROME;
 self :: $version[] = self:: findUserAgentByKey(self :: $userAgent, 'Chrome/');
 }
 else if (strpos(self : : $userAgent, 'Presto/') != null)
 {
 self :: $version[] = OPERA;
 self :: $version[] = self:: findUserAgentByKey(self :: $userAgent, 'Opera/' );
 }
 else
 {
 }

 return self :: $version;
 }


 function matchUserAgent($ua, $key)
 {
 preg_match("/$key.([^s]*? )s/", $ua, $out);

 return $out[1];
 }
}
$ua=UserAgentDetect::detectUserAgent();

print_r($ua);