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！$ajoAzd[_[2Q
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。
首先我创建MYSQL数据库表。
CREATE TABLE tablename (
field type(max_length) DEFAULT 'default_value' (NOT) NULL*wO}0ph Pvx
}可以使用的SQL语句。
CREATE TABLE useronline (0x|0zpDk/i
timestamp int(15) DEFAULT '0' NOT NULL,j_xLG3uXY
ip varchar(40) NOT NULL,
file varchar(100) NOT NULL,
PRIMARY KEY (timestamp),6] m w:W1}{.Z
KEY ip (ip),&iv9B8J?pS
KEY file (file)
);下面我们是PHP脚本，首先我定义MYSQL的信息。~U6dFe5}LH5c
$server = "localhost"; //你的服务器8]mF4Z/S|Ca
$db_user = "root"; //你的mysql的用户名1r c NX'}q
$db_pass = "password"; //你的mysql的密码M-rp }0e7\a5Fb#J
$database = "users"; //表的名字设置统计的时间(多少秒内在线人数)
$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
$database = "users"; //the db nameMS^b{YlK7y
$timeoutseconds = 300;//timeoutseconds limitJ8j RS:e xEd&b&N
//get the current timet.?2[pi6~]3j
$timestamp = time();4[c;l8L'I
//calculate the lowest timestamp allowed*\%ER Kv
$timeout = $timestamp-$timeoutseconds;
?>连接mysql
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：
mysql_db_query('database', 'query');我们只要有访客就要增加一条记录。l8j*V(_v
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");7Kf E]/n1\F2T
如果用户用错误信息的话，这样处理。
if(!($insert)) {
print "Useronline Insert Failed > ";){&dk(?MO1|%}1tk;T
}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)) {
print "Useronline Delete Failed > ";8Hti}"|1O"I6HG
}下面我们解决数据库中不同IP的问题dDa)U5`4sP@7pj
$result = mysql_db_query($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。
mysql_close();显示在线的人数。UX"L-oF&xr&bt
if($user == 1) {
print("1 user online\n");H0k^??
} else {
print("$user users online\n");
}最终把上面代码写成一个PHP文件如下。
<?php;L3p;O1p`xqz
//Put your basic server info here
$server = "localhost"; //normally localhost
$db_user = "root"; //your MySQL database username
$db_pass = "password"; //your MySQL database password
$database = "users";
$timeoutseconds = 300; //it will delete all people which haven't refreshed(so probbably arez&hy1o6y
// offline or inactive) in $timieoutseconds time (so it actually checks the people that are active in the last)V(h9z tM-H
// $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 removedBub(vj,FA
$timeout = $timestamp-$timeoutseconds;d&O#Hq2NJKeBl%g
//connect to database/rikl A8h
mysql_connect($server, $db_user);!X E!my*N&sx ?;N8s
//add the timestamp from the user to the online listV kQ#CIX"O
$insert = mysql_db_query($database, "INSERT INTO useronline VALUESQ{dZ v.jq&x
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");
if(!($insert)) {%UvOxYH$N1j
print "Useronline Insert Failed > "; xXe;S7dR;E4xb] a
}
//delete the peoples which haven't been online/active in the last $timeoutseconds seconds.q nTDFU){
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");
if(!($delete)) { fA]x8IlQ;i
print "Useronline Delete Failed > ";
}
//select the amount of people online, all uniques, which are online on THIS page'E3r\2Y7WN _x!i
$result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");"]f%fw%n4F
if(!($result)) {9CoK)`2T)x#d+vEZ
print "Useronline Select Error > ";#n'C5pVL:jGeL
} K.d%? h6O+r#q9{
//Count the number of rows = the number of people onlinemqiH@'y$Ab
$user = mysql_num_rows($result);
//spit out the results
mysql_close();$^b@9\w
if($user == 1) {
print("1 user online\n");
} else {:wiRhy_]!L#x
print("$user users online\n");
}
?>h9`[%@3A-? @
[url=http://www.now.cn/vhost/][img]http://b.todayisp.com/bbs/760x90h.gif[/img][/url]:d*Tr7A&a
以上代码我是在时代互联提供的免费试用主机上测试的，感觉效果还不错，性能很稳定，不信的话你也可以去试试。当然，记得指出我这个程序中的不足先哦。
时代互联是行业内最早开始提供PHP 虚拟主机的公司之一，现在已经是的金牌域名注册商和中国互联网客户满意度十佳单位，产品功能已经非常完善，特别提一下几个特有用的功能：数据库自动备份、免费集成繁简通简装版、多域名绑定、多子网站支持、GCDN 网站加速器、镜像加速、高级访问统计系统、支持WAP、可选电信/网通/香港机房。'cor)fW!aN:[1B
我之前建站的时候选的是他们公司标准商务E型，因为这款机型还特别支持ASP.NET3.5(3.0/2.0/1.1)/ASP。j/En @i2G)ry
当然啦，这两款主机也是相当不错的。8B@Lr7?&Z8f
智强商务B型：Unix /Linux 操作系统+独立网页空间1000MB+送1000MB邮局空间+100MB MySQL数据库空间=1869元/年*{t6PQn)kO-tk^?
标准商务B型：Unix /Linux 操作系统+独立网页空间500MB+送800MB邮局空间+60MB MySQL数据库空间=1365元/年4|6\0{Bz&\3A2j
提供一下这个公司的联系方式：请见：[url=http://www.now.cn/vhost/]http://www.now.cn/vhost/[/url] !h.[d$W"K
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]
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！