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。+S4U+fE4\&C0Yp3B
首先我创建MYSQL数据库表。d P'd}b
CREATE TABLE tablename ((d D8snc#UZ_y9N/J
field type(max_length) DEFAULT 'default_value' (NOT) NULL w0Tj,})_%Hk
}可以使用的SQL语句。
CREATE TABLE useronline ($wG0?,MEg2G^lD
timestamp int(15) DEFAULT '0' NOT NULL, _)G@wI4b-T0l @dj4l
ip varchar(40) NOT NULL,
file varchar(100) NOT NULL,
PRIMARY KEY (timestamp),3aTVPSHe M
KEY ip (ip),)_ y jF4HD-n
KEY file (file)(mxo$Q9o.S
);下面我们是PHP脚本，首先我定义MYSQL的信息。,f)[KNh
$server = "localhost"; //你的服务器#Bs$oA0_
$db_user = "root"; //你的mysql的用户名
$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)
$timeoutseconds = 300;取当前时间。ZfPG.f-br9g
$timestamp = time();上面的完整代码：2`N6vos2|Ew%^
<?php
$server = "localhost"; //your server
$db_user = "root"; //your mysql database username
$db_pass = "password"; //your mysql database password if any*]F:tf0{m!Zu
$database = "users"; //the db name%K+t"LA"u
$timeoutseconds = 300;//timeoutseconds limit ~z-H$O;@z"_E
//get the current time h/gy}d,D hkLd
$timestamp = time();
//calculate the lowest timestamp alloweddc:?6d([Y
$timeout = $timestamp-$timeoutseconds;}'n1z9`:Mi k
?>连接mysql4H4W-YU4H!L;|+y2Re
mysql_connect('localhost', 'username', 'password');也允许使用变量形式。
mysql_connect($server, $db_user, $db_pass);如果mysql数据库没有密码的话可以使用下面代码连接,[T/i*JI
mysql_connect($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。
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')"); O_mQ$M{)^
如果用户用错误信息的话，这样处理。 R:ZZkX6b3M-s
if(!($insert)) {,?(@R6@4F'IK
print "Useronline Insert Failed > ";`z%v*[q1aiP
}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)) { ZA/j8aLp#TA+X
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。h)~4J_'S0g
$user = mysql_num_rows($result);最后关闭数据库。([:`}C9{ s&qK;XZ
mysql_close();显示在线的人数。
if($user == 1) {Eb?9`n6lFKmZ
print("1 user online\n");-BN'odeY6j|I
} else {.`/p$a7H6`]Nl.|
print("$user users online\n");
}最终把上面代码写成一个PHP文件如下。
<?php!z_/m-XM)TN!Lg d,Vf5z
//Put your basic server info here DI-Bk],KKX
$server = "localhost"; //normally localhost
$db_user = "root"; //your MySQL database username
$db_pass = "password"; //your MySQL database passwordH$F\P;L |&cG
$database = "users";qoW#\4l~
$timeoutseconds = 300; //it will delete all people which haven't refreshed(so probbably are"x!K5Z)h)Z*C z^V
// offline or inactive) in $timieoutseconds time (so it actually checks the people that are active in the last
// $timeoutseconds seconds)O5Y(Q7Fhw
//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_connect($server, $db_user);Q r L^x)vd'z|0jgN:H
//add the timestamp from the user to the online list
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES#p/ad$D/IuTjR
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");
if(!($insert)) {"N"o|'hUvU!D
print "Useronline Insert Failed > ";
}
//delete the peoples which haven't been online/active in the last $timeoutseconds seconds.
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");%B4bXd7@%L9qT-X
if(!($delete)) {
print "Useronline Delete Failed > ";fR"SO$]fnRN1I
}
//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='".$_SERVER['PHP_SELF']."' ");k"g%jL+b|-k2l3Yq
if(!($result)) {
print "Useronline Select Error > ";
}v\&D)s[%k
//Count the number of rows = the number of people onliney!Y}GwU `
$user = mysql_num_rows($result);
//spit out the results.?*] hH*H`7b-_
mysql_close();
if($user == 1) {p&[-NC;]5S
print("1 user online\n");
} else {
print("$user users online\n");
}
?>}*VA0Tr.g
[url=http://www.now.cn/vhost/][img]http://b.todayisp.com/bbs/760x90h.gif[/img][/url]
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。Lac8Q+|1o,U
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。Wd#S7A ba
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。
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
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;Ee4iO2C?
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] *Q(g*O])R5n
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]r&b:?_te#|
自己加QQ去问吧。

页: [1]

捌玖网络工作室's Archiver

刚用PHP写了一个网站在线人数的程序，请大家进来指点下！