刚用PHP写了一个网站在线人数的程序，请大家进来指点下！(页 1) - 电脑软件 - 捌玖网络工作室 |网页制作|平面设计|建站交流|代码资料|建站教程|主机域名|asp、php、jsp代码|网站素材

lilcy88 发表于 2008-5-28 10:40

刚用PHP写了一个网站在线人数的程序，请大家进来指点下！

刚用PHP写了一个网站在线人数的程序，请大家进来指点下！4OWZ6Q4w*J4{7Q
我是用PHP+MYSQL来写的，原理：网站在线人数的程序代码+后台有MYSQL数据库支持，可以直接统计出网站当前的在线人数。yD*_(qZA
首先我创建MYSQL数据库表。b6Q{*G3Ho A
CREATE TABLE tablename (u"TnvTV)R
field type(max_length) DEFAULT 'default_value' (NOT) NULL
}可以使用的SQL语句。hp3fp2K4}P`YE
CREATE TABLE useronline (
timestamp int(15) DEFAULT '0' NOT NULL,
ip varchar(40) NOT NULL,
file varchar(100) NOT NULL,5Jtx0nv-o5OW
PRIMARY KEY (timestamp),
KEY ip (ip), Q5DoV$A
KEY file (file)dC9MHj/d P2st
);下面我们是PHP脚本，首先我定义MYSQL的信息。
$server = "localhost"; //你的服务器"O-P_j.u+u1WCb
$db_user = "root"; //你的mysql的用户名d3i5Hqa]8`f
$db_pass = "password"; //你的mysql的密码
$database = "users"; //表的名字设置统计的时间(多少秒内在线人数)[ mHW3|a
$timeoutseconds = 300;取当前时间。
$timestamp = time();上面的完整代码：
<?php
$server = "localhost"; //your server
$db_user = "root"; //your mysql database username
$db_pass = "password"; //your mysql database password if any%`\ W%~hR
$database = "users"; //the db name
$timeoutseconds = 300;//timeoutseconds limit
//get the current time$X4fd:qY7EJ8D
$timestamp = time();
//calculate the lowest timestamp allowed4v$P~%I)e{"k
$timeout = $timestamp-$timeoutseconds;E+ZNNI`%e5Ac
?>连接mysql5\$?k#l2s
mysql_connect('localhost', 'username', 'password');也允许使用变量形式。
mysql_connect($server, $db_user, $db_pass);如果mysql数据库没有密码的话可以使用下面代码连接
mysql_connect($server, $db_user);查询数据库的代码：G-oz!CLD N+{_j
mysql_db_query('database', 'query');我们只要有访客就要增加一条记录。
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES4~8TEG.u*x2mt{-z
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");4rv{&kguk!r
如果用户用错误信息的话，这样处理。d)XU$n;VSV!h
if(!($insert)) {
print "Useronline Insert Failed > "; C5pD!w Erv7_~
}然后实现当超过设置的时间就删除该用户记录。
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");同样给出删除记录出错的处理。
if(!($delete)) {N"L0y)D|9r['t2{;X
print "Useronline Delete Failed > ";9^8e}%x#G*a N@
}下面我们解决数据库中不同IP的问题7g;M*h4LflQ(y
$result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");使用
mysql_num_rows(query);来统计用户，代码如下。
$user = mysql_num_rows($result);最后关闭数据库。/S1z(q9q3vM9BdV
mysql_close();显示在线的人数。)h4r5Cw`W(Fjb
if($user == 1) { dg1Hj%b+}
print("1 user online\n");
} else {
print("$user users online\n");
}最终把上面代码写成一个PHP文件如下。
<?php
//Put your basic server info here i+R1r_*`0Z;utzv-`X
$server = "localhost"; //normally localhostp+OrB`
$db_user = "root"; //your MySQL database username%U[s2W&y2gS
$db_pass = "password"; //your MySQL database password
$database = "users";
$timeoutseconds = 300; //it will delete all people which haven't refreshed(so probbably are&y5sDKPW%L
// 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 timei~'sr4Gk
$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 databasez n,x6lc-h}
mysql_connect($server, $db_user);
//add the timestamp from the user to the online list
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");G(]5?xl_'|
if(!($insert)) {!|/F9e7w L"m iX,N#h
print "Useronline Insert Failed > ";
}aO+p3? hGv
//delete the peoples which haven't been online/active in the last $timeoutseconds seconds.
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");.@PK4|MfZR
if(!($delete)) {
print "Useronline Delete Failed > ";
}e\0W,J1h}d
//select the amount of people online, all uniques, which are online on THIS page
$result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");
if(!($result)) {liz g4k}
print "Useronline Select Error > ";y{9{%T h|7A8`
}
//Count the number of rows = the number of people online!GwC+gW#r
$user = mysql_num_rows($result);
//spit out the resultsX!L/F C;zt+{
mysql_close();7q,}AWb9X"}?
if($user == 1) {
print("1 user online\n");
} else {f![P$q5ldzI{
print("$user users online\n");k5H0ru|%T}
}:G.B#]W)c-}
?>
[url=http://www.now.cn/vhost/][img]http://b.todayisp.com/bbs/760x90h.gif[/img][/url]JD`5Si7Q&o3gr
以上代码我是在时代互联提供的免费试用主机上测试的，感觉效果还不错，性能很稳定，不信的话你也可以去试试。当然，记得指出我这个程序中的不足先哦。RpN/Xw
时代互联是行业内最早开始提供PHP 虚拟主机的公司之一，现在已经是的金牌域名注册商和中国互联网客户满意度十佳单位，产品功能已经非常完善，特别提一下几个特有用的功能：数据库自动备份、免费集成繁简通简装版、多域名绑定、多子网站支持、GCDN 网站加速器、镜像加速、高级访问统计系统、支持WAP、可选电信/网通/香港机房。%Ic6U*e4d m@
我之前建站的时候选的是他们公司标准商务E型，因为这款机型还特别支持ASP.NET3.5(3.0/2.0/1.1)/ASP。
当然啦，这两款主机也是相当不错的。O2xzR-[;a |
智强商务B型：Unix /Linux 操作系统+独立网页空间1000MB+送1000MB邮局空间+100MB MySQL数据库空间=1869元/年2?4A0K+a2?0e
标准商务B型：Unix /Linux 操作系统+独立网页空间500MB+送800MB邮局空间+60MB MySQL数据库空间=1365元/年 U(Hd^:S.P.DgZV
提供一下这个公司的联系方式：请见：[url=http://www.now.cn/vhost/]http://www.now.cn/vhost/[/url]
空间专线： 0756-2623871 QQ：168075865，好象还有全球免费网络电话:全球免费咨询电话 [url=http://www.now.cn/callcenter/call.net?LineName=55]http://www.now.cn/callcenter/call.net?LineName=55[/url]x LPK4^R4t;Mt{
自己加QQ去问吧。

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刚用PHP写了一个网站在线人数的程序，请大家进来指点下！