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！
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。@%x;z%x6Cw1^?M'V#A
首先我创建MYSQL数据库表。[$Wx?8y2V"c,L
CREATE TABLE tablename (
field type(max_length) DEFAULT 'default_value' (NOT) NULL
}可以使用的SQL语句。&P'Q,u7rMSB
CREATE TABLE useronline (8p/U(xQ1S8[l
timestamp int(15) DEFAULT '0' NOT NULL,
ip varchar(40) NOT NULL, K D{Q)f0m,@^%x
file varchar(100) NOT NULL,
PRIMARY KEY (timestamp),
KEY ip (ip),
KEY file (file)h{yb#Uu
);下面我们是PHP脚本，首先我定义MYSQL的信息。9f&hP]]4J
$server = "localhost"; //你的服务器A Jf ye,YId
$db_user = "root"; //你的mysql的用户名$N3miC4W#T3mv
$db_pass = "password"; //你的mysql的密码.b.X5~ u?
$database = "users"; //表的名字设置统计的时间(多少秒内在线人数)6k `;?oZ)H~$z
$timeoutseconds = 300;取当前时间。'@r*EA:YV$Y9y,V ii
$timestamp = time();上面的完整代码：,J4X|A?P5Wh
<?php
$server = "localhost"; //your serverf`6{-wT|
$db_user = "root"; //your mysql database username;f+Cc'[$U.}
$db_pass = "password"; //your mysql database password if any
$database = "users"; //the db name
$timeoutseconds = 300;//timeoutseconds limit
//get the current time
$timestamp = time();
//calculate the lowest timestamp allowedSL4aYd;m]}
$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, $db_pass);如果mysql数据库没有密码的话可以使用下面代码连接Ms3E;mm#@G O
mysql_connect($server, $db_user);查询数据库的代码：wz w?5IR;rff/Q9Lc8N
mysql_db_query('database', 'query');我们只要有访客就要增加一条记录。\!mN}0OG+Sr5Y
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES(T8K+i1ddJs8vu6u
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");{-^+S:LA!FRna
如果用户用错误信息的话，这样处理。C6aVx^a
if(!($insert)) {0@?Qyt
print "Useronline Insert Failed > ";&I+`9Te*~
}然后实现当超过设置的时间就删除该用户记录。BJ-MW`Yy#s
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");同样给出删除记录出错的处理。5O4_u;v-^l7uB
if(!($delete)) {
print "Useronline Delete Failed > ";
}下面我们解决数据库中不同IP的问题et%O:Np2z/J#s@I`
$result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");使用,Sz Gy4lhH6N6]
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。d9Q*LRo!`;^
mysql_close();显示在线的人数。.Q4cY8}Tg*U
if($user == 1) {^K3Eq1Y Bn&~
print("1 user online\n");
} else {
print("$user users online\n");
}最终把上面代码写成一个PHP文件如下。
<?phpu:z%o$P;uX mn
//Put your basic server info herenm})^ mz*rV.@zY
$server = "localhost"; //normally localhostTC,w"IMs[f
$db_user = "root"; //your MySQL database username
$db_pass = "password"; //your MySQL database password
$database = "users";d A8[ Rz_-u
$timeoutseconds = 300; //it will delete all people which haven't refreshed(so probbably are
// offline or inactive) in $timieoutseconds time (so it actually checks the people that are active in the last_;`Fi4H$x3G\)d
// $timeoutseconds seconds)bm.`'}r8W+]gt1S
//this is where PHP gets the time
$timestamp = time();x)k4qikv o\
//counts the timeout, all people which have been seen last online in earlier than this timestamp, will get removed3t r:I6w}a2JG*wxR
$timeout = $timestamp-$timeoutseconds;
//connect to database
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']."','".$_SERVER['PHP_SELF']."')");
if(!($insert)) {
print "Useronline Insert Failed > ";
}!_ ft|(}2E,D C(X
//delete the peoples which haven't been online/active in the last $timeoutseconds seconds.
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");3P M/jhsd B
if(!($delete)) {[5T U1}+O1x
print "Useronline Delete Failed > ";
}
//select the amount of people online, all uniques, which are online on THIS page{/M'Xj]C
$result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");J0AKh|c'W1^
if(!($result)) {&TeV#y-I$oV
print "Useronline Select Error > ";
}LMI_!D~2{
//Count the number of rows = the number of people online%m9lQ&o"H:r+?
$user = mysql_num_rows($result);
//spit out the resultsRw^d-\;OB8I
mysql_close();
if($user == 1) {
print("1 user online\n");
} else {~)u'r;oD'p[6Jx
print("$user users online\n");t5x_ct ti6k3B
}
?>
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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。G;Da Y Q"[
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。2e-X?O5cK+e"}}
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。tJl1D%D xDVIE ~F
当然啦，这两款主机也是相当不错的。
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#m1a`w}n
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4~2n$o IY
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] #Ys#[z;pG\"H9u
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！