PHP ʖ²ἯTH º󍋼/A Ղ 2. ¼򃷽̳̼/TD ʵӃµĽű¾ ?php echo $_SERVER["HTTP_USER_AGENT"];? Mozilla/4.0 (compatible; MSIE 5.01; Windows NT 5.0) =ד 2-3. ;Ӄ phpinfo() 4ϔʾ˹ӐԤ¶¨ҥ±䁿 ?php phpinfo();? =ד 2-4. ½ṹ¿ؖƼ/A ӫº¯ʽµĊ¹Ӄ ?php if (strstr($_SERVER["HTTP_USER_AGENT"], "MSIE")) {echo "You are using Internet Explorer br / ";}? ¸ýű¾µĊ䳶¿Ʉ܊ǣº You are using Internet Explorer br / =ד 2-5. »캍 HTML º͠PHP ģʽ ?php if (strstr($_SERVER["HTTP_USER_AGENT"], "MSIE")) {? h3 strstr must have returned true /h3 center b You are using Internet Explorer /b /center ?php} else {? h3 strstr must have returned false /h3 center b You are not using Internet Explorer /b /center ?php}? ¸ýű¾µĊ䳶¿Ʉ܊ǣº h3 strstr must have returned true /h3 center b You are using Internet Explorer /b /center º󍋼/A ưµ㼯A ɏһ¼¶