摘要：<?phpglobal $count;$count=1;if(!isset($_COOKIE["visittime"])){ setcookie("visittime",date("y-m-d H:i:s")); setcookie("visitcount",1); echo "欢迎你第一次访问网站!";}else{ setcookie("visittime",date("y-m-d,H:i:s"),time()+60); $count=$_COOK 阅读全文

摘要：<?phpabstract class baseAgent{ abstract function PrintPage();}class ieAgent extends baseAgent{ function PrintPage(){ return "当前浏览器是IE!"; } }class otherAgent extends baseAgent{ function PrintPage(){ return "当前浏览器不是IE!"; }}if(strstr($_SERVER["HTTP_USER_AGENT"],"IE 阅读全文