访问量一大功能就不能正确实现了,求高手帮忙优化两段PHP代码
第一段:
- PHP code
<!---ecms Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/--><?php@session_start();date_default_timezone_set('Asia/Shanghai');$link_id =@ mysql_connect('localhost', 'root', 'password');if ($link_id) { mysql_select_db('database'); mysql_query("set n<p style="color:transparent">。本文来源gao!%daima.com搞$代*!码网1</p><cite>搞代gaodaima码</cite>ames 'utf8'"); //select 数据库之后加多这一句} else{ echo "数据库连接错误!";}//var_dump($current);$Datetime=date("Y-m-d G:i:s");//获取注册时间,也就是数据写入到用户表的时间$bijiao="select max(current) from online";$max=@mysql_query($bijiao,$link_id);$most= intval( @mysql_result($max,0) );$current= intval($_SESSION['current']);$query="insert into online(current,mostcount,time) values('".$current."','".$most."','$Datetime')";$result=mysql_query($query);echo $most;?>
第二段:
- PHP code
<!---ecms Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/--><?php@session_start();date_default_timezone_set('Asia/Shanghai');$link_id =@ mysql_connect('localhost', 'root', 'password');if ($link_id) { mysql_select_db('database'); mysql_query("set names 'utf8'"); //select 数据库之后加多这一句} else{ echo "数据库连接错误!";}$bijiao="select max(mostcount) from online";$max=@mysql_query($bijiao,$link_id);$most= intval( @mysql_result($max,0) );$time="select time from online where mostcount='$most'";$time=@mysql_query($time,$link_id);$time=@mysql_result($time,0);$already="select max(mostcount) from record";$already=@mysql_query($already,$link_id);$already= intval( @mysql_result($already,0) );if($most>$already){ $query="insert into record(mostcount,time) values('".$most."','$time')"; $result=@mysql_query($query);}?>
——解决方案——————–
第一段与第二端的算法大致相同
第二段的算法有点胡闹
如果你对未加索引的 current 或 mostcount 做 max 操作,势必占用大量的时间
——解决方案——————–
你在数据库中给current和mostcount加上索引就行了