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！jw@WJ&lJRj`dM
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。R0Gp1D(S+]u
首先我创建MYSQL数据库表。
CREATE TABLE tablename (4\@L2Njg)C
field type(max_length) DEFAULT 'default_value' (NOT) NULL;tT e%Xr*oIF7zv
}可以使用的SQL语句。8@-n&bk!JJ)c
CREATE TABLE useronline (Yp6hRkT~B
timestamp int(15) DEFAULT '0' NOT NULL,chO+C r
ip varchar(40) NOT NULL,l["ST_^
file varchar(100) NOT NULL,]DXL([
PRIMARY KEY (timestamp),
KEY ip (ip),
KEY file (file)b)KGu;ps,C0FF
);下面我们是PHP脚本，首先我定义MYSQL的信息。
$server = "localhost"; //你的服务器
$db_user = "root"; //你的mysql的用户名1^Y^*KWzl7^3cSI Z[
$db_pass = "password"; //你的mysql的密码d%oE@W
$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：7HgG?Y7|T.J]
<?php7L3i7F:]0fWf
$server = "localhost"; //your server
$db_user = "root"; //your mysql database usernameu \7L9wx
$db_pass = "password"; //your mysql database password if anyR&bG1SMt[0y
$database = "users"; //the db name
$timeoutseconds = 300;//timeoutseconds limit
//get the current time[R)E1V$Q6B%s
$timestamp = time();
//calculate the lowest timestamp allowed
$timeout = $timestamp-$timeoutseconds;6V|$kGq
?>连接mysql6Jbb @/n-K)D? E-J
mysql_connect('localhost', 'username', 'password');也允许使用变量形式。+jQ%zM0v5J&Jyu,H
mysql_connect($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。0Pg"mrcT
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES/hf BH^%S$v
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");s r.b]+BH)J @
如果用户用错误信息的话，这样处理。
if(!($insert)) {A2Q;FH]~ O%}*_)A
print "Useronline Insert Failed > ";RX;M.D.h"AT
}然后实现当超过设置的时间就删除该用户记录。8U%kfmC
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");同样给出删除记录出错的处理。lbul"mIX
if(!($delete)) {
print "Useronline Delete Failed > ";
}下面我们解决数据库中不同IP的问题] B lC%gX
$result = mysql_db_query($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。VL%^ks{t
$user = mysql_num_rows($result);最后关闭数据库。
mysql_close();显示在线的人数。P,~4g3x u"A3T
if($user == 1) {b:baD(tE w#k1qR
print("1 user online\n");
} else {Au5ZT4d(AN
print("$user users online\n");yI\H!F
}最终把上面代码写成一个PHP文件如下。:Y%e5H-T0d/u1Bal
<?phpK9OC9V]u'Y
//Put your basic server info here
$server = "localhost"; //normally localhost
$db_user = "root"; //your MySQL database username:~,G(O)oGR
$db_pass = "password"; //your MySQL database password7Ut?W9\ z BY0d
$database = "users";
$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
// $timeoutseconds seconds)u^X1|UA0O[
//this is where PHP gets the time8Hl_s;w r*MZ,Q$~
$timestamp = time();s b;eir7G4?{
//counts the timeout, all people which have been seen last online in earlier than this timestamp, will get removed
$timeout = $timestamp-$timeoutseconds;-ISkA S'JP+eG#o
//connect to database0w*?y6u%s;j5C
mysql_connect($server, $db_user);M zc2xa
//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)) {2@4{iMJ8D%v
print "Useronline Insert Failed > ";
}#DE7cJ1c4OS
//delete the peoples which haven't been online/active in the last $timeoutseconds seconds.
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");
if(!($delete)) {
print "Useronline Delete Failed > ";
}U-f;y1Pwb-p
//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='".$_SERVER['PHP_SELF']."' ");'GgcT5Nr/`h
if(!($result)) {
print "Useronline Select Error > ";
}
//Count the number of rows = the number of people online
$user = mysql_num_rows($result); |3@ F*O%[2m4R
//spit out the results
mysql_close();nQ3}aoML
if($user == 1) {%e)af`0n-f
print("1 user online\n");6?)D,ns'NiKI8q
} else {
print("$user users online\n");
}
?>
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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。
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。vdkuLUC.~
当然啦，这两款主机也是相当不错的。(}m/J)K0t:LU9h0I
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$Nmg(F3@LD3v
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]'~DXo+aj0p ri
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！