PHP+MYSQL实现 网站在线人数统计[代码]
2007-11-12 08:11:23 来源:WEB开发网核心提示: PHP实例教程:网站在线人数的程序代码,后台有MySQL(和PHP搭配之最佳组合)数据库支持,PHP+MYSQL实现 网站在线人数统计[代码],可以直接统计出网站当前的在线人数, 首先是创建MySQL(和PHP搭配之最佳组合)数据库表,代码如下: 以下是引用片段:$user = MySQL(和PHP搭配
PHP实例教程:网站在线人数的程序代码,后台有MySQL(和PHP搭配之最佳组合)数据库支持。可以直接统计出网站当前的在线人数。
首先是创建MySQL(和PHP搭配之最佳组合)数据库表。
以下是引用片段: CREATE TABLE tablename ( field type(max_length) DEFAULT 'default_value' (NOT) NULL } |
可以使用的SQL语句。
以下是引用片段: CREATE TABLE useronline ( timestamp int(15) DEFAULT '0' NOT NULL, ip varchar(40) NOT NULL, file varchar(100) NOT NULL, Prima(最完善的虚拟主机管理系统)RY KEY (timestamp), KEY ip (ip), KEY file (file) ); |
下面我们开始使用PHP脚本,首先定义MySQL(和PHP搭配之最佳组合)的信息。
以下是引用片段: $server = "localhost"; //你的服务器 $db_user = "root"; //你的MySQL(和PHP搭配之最佳组合)的用户名 $db_pass = "password"; //你的MySQL(和PHP搭配之最佳组合)的密码 $database = "users"; //表的名字 |
设置统计的时间(多少秒内在线人数)
以下是引用片段: $timeoutseconds = 300; |
取当前时间。
以下是引用片段: $timestamp = time(); |
上面的完整代码:
以下是引用片段: <?php $server = "localhost"; //your server $db_user = "root"; //your MySQL(和PHP搭配之最佳组合) database username $db_pass = "password"; //your MySQL(和PHP搭配之最佳组合) database password if any $database = "users"; //the db name $timeoutseconds = 300;//timeoutseconds limit //get the current time $timestamp = time(); //calculate the lowest timestamp allowed $timeout = $timestamp-$timeoutseconds; ?> |
连接MySQL(和PHP搭配之最佳组合)
以下是引用片段: MySQL(和PHP搭配之最佳组合)_connect('localhost', 'username', 'password'); |
也允许使用变量形式。
以下是引用片段: MySQL(和PHP搭配之最佳组合)_connect($server, $db_user, $db_pass); |
如果MySQL(和PHP搭配之最佳组合)数据库没有密码的话可以使用下面代码连接(当然建议大家一定要设置好自己的密码,这样起码黑客得要解密啊)
以下是引用片段: MySQL(和PHP搭配之最佳组合)_connect($server, $db_user); |
查询数据库的代码:
以下是引用片段: MySQL(和PHP搭配之最佳组合)_db_query('database', 'query'); |
我们只要有访客就要增加一条记录。
以下是引用片段: $insert = MySQL(和PHP搭配之最佳组合)_db_query($database, "INSERT INTO useronline VALUES ('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')"); |
然后我们给出如果用户用错误信息的处理方式。
以下是引用片段: if(!($insert)) { print "Useronline Insert Failed > "; } |
然后我们得实现当超过我们设置的时间我们就要删除该用户记录。
以下是引用片段: $delete = MySQL(和PHP搭配之最佳组合)_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout"); |
同样给出删除记录出错的处理。
以下是引用片段: if(!($delete)) { print "Useronline Delete Failed > "; } |
下面我们显示数据库中有多少个不同的IP
以下是引用片段: $result = MySQL(和PHP搭配之最佳组合)_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' "); |
我们使用MySQL(和PHP搭配之最佳组合)_num_rows(query);来统计用户,代码如下:
以下是引用片段: $user = MySQL(和PHP搭配之最佳组合)_num_rows($result); |
最后我们要关闭数据库。
以下是引用片段: MySQL(和PHP搭配之最佳组合)_close(); |
显示在线的人数。
以下是引用片段: if($user == 1) { print("1 user online\n"); } else { print("$user users online\n"); } |
最终把上面代码写成一个PHP文件如下。
以下是引用片段: <?php //Put your basic server info here $server = "localhost"; //normally localhost $db_user = "root"; //your MySQL(和PHP搭配之最佳组合) database username $db_pass = "password"; //your MySQL(和PHP搭配之最佳组合) database password $database = "users"; $timeoutseconds = 300; //it will delete all people which haven't refreshed(so probbably are // offline or inactive) in $timieoutseconds time (so it actually checks the people that are active in the last // $timeoutseconds seconds) //this is where PHP gets the time $timestamp = time(); //counts the timeout, all people which have been seen last online in earlier than this timestamp, will get removed $timeout = $timestamp-$timeoutseconds; //connect to database MySQL(和PHP搭配之最佳组合)_connect($server, $db_user); //add the timestamp from the user to the online list $insert = MySQL(和PHP搭配之最佳组合)_db_query($database, "INSERT INTO useronline VALUES ('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')"); if(!($insert)) { print "Useronline Insert Failed > "; } //delete the peoples which haven't been online/active in the last $timeoutseconds seconds. $delete = MySQL(和PHP搭配之最佳组合)_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout"); if(!($delete)) { print "Useronline Delete Failed > "; } //select the amount of people online, all uniques, which are online on THIS page $result = MySQL(和PHP搭配之最佳组合)_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' "); if(!($result)) { print "Useronline Select Error > "; } //Count the number of rows = the number of people online $user = MySQL(和PHP搭配之最佳组合)_num_rows($result); //spit out the results MySQL(和PHP搭配之最佳组合)_close(); if($user == 1) { print("1 user online\n"); } else { print("$user users online\n"); } ?> |
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