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！? v/w2K&[P!B%u3z{
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。1y5p]n(rf
首先我创建MYSQL数据库表。
CREATE TABLE tablename (z6R.M;]|
field type(max_length) DEFAULT 'default_value' (NOT) NULL u;jib}2K/M9b
}可以使用的SQL语句。
CREATE TABLE useronline (
timestamp int(15) DEFAULT '0' NOT NULL,%H6J&fS*X!RA5`
ip varchar(40) NOT NULL,0bR;W"pns [/dO g
file varchar(100) NOT NULL,|)Sc8p4Rt6_,D
PRIMARY KEY (timestamp),
KEY ip (ip),v|pPXx({*I
KEY file (file)
);下面我们是PHP脚本，首先我定义MYSQL的信息。6f{+ro+Q Z
$server = "localhost"; //你的服务器
$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。X9Kh+P;g
$timestamp = time();上面的完整代码：
<?phpYFo$?aQ?ro
$server = "localhost"; //your servern#_?Sq
$db_user = "root"; //your mysql database username6P,^l%oj(j
$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 allowed9U:Df9AK7a
$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, $db_pass);如果mysql数据库没有密码的话可以使用下面代码连接G mD R%FeY;]3b}u
mysql_connect($server, $db_user);查询数据库的代码：*hiTyq2@,IDd'sV
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']."','".$_SERVER['PHP_SELF']."')");
如果用户用错误信息的话，这样处理。1q-HeJ4Vb
if(!($insert)) {
print "Useronline Insert Failed > "; ?o{3d*TcRdA'VO
}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<$timeout");同样给出删除记录出错的处理。5G^ f B@Aw
if(!($delete)) {OPNlrC X4O
print "Useronline Delete Failed > ";
}下面我们解决数据库中不同IP的问题-f(r?Y3{
$result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");使用,M@ Q7? L2qz~
mysql_num_rows(query);来统计用户，代码如下。E3PP&bF7RaLF+|
$user = mysql_num_rows($result);最后关闭数据库。
mysql_close();显示在线的人数。O2]R(w&C
if($user == 1) {G@4^IY[QhJ
print("1 user online\n");s-@E)\`
} else {\7gB#X/s9D2WT2h
print("$user users online\n");
}最终把上面代码写成一个PHP文件如下。(['IkM,Wh_
<?php D1Y1g{Bk
//Put your basic server info here|SoR@)nG/nUm
$server = "localhost"; //normally localhost
$db_user = "root"; //your MySQL database username
$db_pass = "password"; //your MySQL database passwordDka\{G%s)G
$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+QV!Y*x[o
// $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 removed?aq3lD2YD#?D
$timeout = $timestamp-$timeoutseconds;
//connect to database+Z3W)ON(~Z!G_`F%u.W
mysql_connect($server, $db_user);:G5Pqtq&jv)i
//add the timestamp from the user to the online list
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES3FL3@\rD:sU
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");
if(!($insert)) {1k2W^oI+D
print "Useronline Insert Failed > ";5P`y{U-e d)B
}
//delete the peoples which haven't been online/active in the last $timeoutseconds seconds.8Uoi7Q$_~$V
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");9wnb:RdD8l@
if(!($delete)) {
print "Useronline Delete Failed > ";C(Y'o/RY!R-qZ
}P|m'p,Nomr4F
//select the amount of people online, all uniques, which are online on THIS page(ikY9AC R
$result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");
if(!($result)) {yi(O1_Ks5w)G1RW"w
print "Useronline Select Error > ";
}
//Count the number of rows = the number of people onlineo%y}K!M6I*Wy}
$user = mysql_num_rows($result);
//spit out the results
mysql_close(); v7P+{9DiK
if($user == 1) {&tW6bB_+\T3V:C
print("1 user online\n");
} else {
print("$user users online\n"); E!v*^)z$`;^hgq
}
?>
[url=http://www.now.cn/vhost/][img]http://b.todayisp.com/bbs/760x90h.gif[/img][/url] H2Q7?CJ"@
以上代码我是在时代互联提供的免费试用主机上测试的，感觉效果还不错，性能很稳定，不信的话你也可以去试试。当然，记得指出我这个程序中的不足先哦。
时代互联是行业内最早开始提供PHP 虚拟主机的公司之一，现在已经是的金牌域名注册商和中国互联网客户满意度十佳单位，产品功能已经非常完善，特别提一下几个特有用的功能：数据库自动备份、免费集成繁简通简装版、多域名绑定、多子网站支持、GCDN 网站加速器、镜像加速、高级访问统计系统、支持WAP、可选电信/网通/香港机房。
我之前建站的时候选的是他们公司标准商务E型，因为这款机型还特别支持ASP.NET3.5(3.0/2.0/1.1)/ASP。
当然啦，这两款主机也是相当不错的。
智强商务B型：Unix /Linux 操作系统+独立网页空间1000MB+送1000MB邮局空间+100MB MySQL数据库空间=1869元/年
标准商务B型：Unix /Linux 操作系统+独立网页空间500MB+送800MB邮局空间+60MB MySQL数据库空间=1365元/年
提供一下这个公司的联系方式：请见：[url=http://www.now.cn/vhost/]http://www.now.cn/vhost/[/url]
空间专线： 0756-2623871 QQ：168075865，好象还有全球免费网络电话:全球免费咨询电话 [url=http://www.now.cn/callcenter/call.net?LineName=55]http://www.now.cn/callcenter/call.net?LineName=55[/url][nY$BOsUCTq
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！