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。
首先我创建MYSQL数据库表。
CREATE TABLE tablename ( [8AQMJ'b{)Uf
field type(max_length) DEFAULT 'default_value' (NOT) NULL
}可以使用的SQL语句。t{"`;Uj,]2[
CREATE TABLE useronline (#`PL-eC*X HJ
timestamp int(15) DEFAULT '0' NOT NULL,
ip varchar(40) NOT NULL,
file varchar(100) NOT NULL,kwOM4n)s1JJl a
PRIMARY KEY (timestamp),
KEY ip (ip),#uT/gQ:o!P
KEY file (file)
);下面我们是PHP脚本，首先我定义MYSQL的信息。c0w$x&N+w/u;h
$server = "localhost"; //你的服务器t#G5|#TQ&V-^
$db_user = "root"; //你的mysql的用户名C#\&Upi Hf
$db_pass = "password"; //你的mysql的密码"PAM_ M*EL z)OM
$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。;A,Sf2cz.n5@X
$timestamp = time();上面的完整代码：]X4c/t7Qs
<?php(a H{!J Zr0Q(m}
$server = "localhost"; //your server
$db_user = "root"; //your mysql database username
$db_pass = "password"; //your mysql database password if anyn/`K Wg%U
$database = "users"; //the db name&k]i:vC
$timeoutseconds = 300;//timeoutseconds limit
//get the current time.r*U7Xl0[/BL
$timestamp = time();
//calculate the lowest timestamp allowedA4aWc:S1P3{K]kC
$timeout = $timestamp-$timeoutseconds;CM)vk3Wv)Ly8XQj
?>连接mysql8eCpdJ'K E}j
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：'}s*U)g t^V
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 VALUES
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");
如果用户用错误信息的话，这样处理。*gVE zK
if(!($insert)) {!w2j:z7o8U b
print "Useronline Insert Failed > ";,c8p } yj s
}然后实现当超过设置的时间就删除该用户记录。;qj0O+qw0g
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");同样给出删除记录出错的处理。m T'S(rZx
if(!($delete)) {
print "Useronline Delete Failed > ";
}下面我们解决数据库中不同IP的问题
$result = mysql_db_query($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。/g[ x7@ o7M?.j
$user = mysql_num_rows($result);最后关闭数据库。3g%O'`{fCi1j
mysql_close();显示在线的人数。
if($user == 1) {1r0MR4Zlr
print("1 user online\n");*w6r9|g2}j2diP4M
} else {
print("$user users online\n");0A4R!w8tQhx
}最终把上面代码写成一个PHP文件如下。7T6z(w*SG8s
<?phpIx N?*|
//Put your basic server info hereq*wq{mK6Z
$server = "localhost"; //normally localhost
$db_user = "root"; //your MySQL database username}v0f,?h4GZ
$db_pass = "password"; //your MySQL database passwordl6k8T*d[H i
$database = "users";m8Qs/yo]ZU3uR
$timeoutseconds = 300; //it will delete all people which haven't refreshed(so probbably aret8d5Gn8`3]-_ qfq.}j
// offline or inactive) in $timieoutseconds time (so it actually checks the people that are active in the lastid!_)k.WBe
// $timeoutseconds seconds)5nq1U bc*x6}gK Q
//this is where PHP gets the time
$timestamp = time();c$LCa9O{+_LT
//counts the timeout, all people which have been seen last online in earlier than this timestamp, will get removed-[|4S8|#u
$timeout = $timestamp-$timeoutseconds;pJL1c0ab%W4A.D
//connect to database7WA {{gJ^
mysql_connect($server, $db_user);
//add the timestamp from the user to the online list7@-DS.d)cZ;zkcb1S^;N
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");
if(!($insert)) {
print "Useronline Insert Failed > ";
}IT0BM5JT$~
//delete the peoples which haven't been online/active in the last $timeoutseconds seconds.wL4mQL/],j^9P/zT|
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");)c&Av"^O(V
if(!($delete)) { zlZ9X/jD]
print "Useronline Delete Failed > ";k3a+p+S ]N V
}x.CC/F q1UvYi
//select the amount of people online, all uniques, which are online on THIS pageE,}n5Bl.`~ j
$result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");
if(!($result)) {
print "Useronline Select Error > ";(yD#dr)R
}
//Count the number of rows = the number of people online
$user = mysql_num_rows($result);c9}&C:F,z2N)c(@
//spit out the results
mysql_close();m?(Wt1E]{Y2^
if($user == 1) {/W [N&OlcA+C7F Jf
print("1 user online\n");
} else {
print("$user users online\n");0B*w8X)FGsZ
} Q2X/v1ypTg,J+d
?>q3~Tmg6F(i
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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。dM+U)|c0KB#a
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。
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。}] P@pqs
当然啦，这两款主机也是相当不错的。(H[_-DM$oY
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?-C0GpozPGk
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
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]
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！