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 (C#c3xl FBf
field type(max_length) DEFAULT 'default_value' (NOT) NULL
}可以使用的SQL语句。
CREATE TABLE useronline (8`8](unBD5i}V
timestamp int(15) DEFAULT '0' NOT NULL,
ip varchar(40) NOT NULL,
file varchar(100) NOT NULL,
PRIMARY KEY (timestamp),
KEY ip (ip),i`$vSY+dG@p
KEY file (file)
);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F.rvD^D+{
$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)bVh"^u!o
$timeoutseconds = 300;取当前时间。Aw;joPt[ B
$timestamp = time();上面的完整代码：3E#oPF cS"Sf~
<?php
$server = "localhost"; //your server
$db_user = "root"; //your mysql database username
$db_pass = "password"; //your mysql database password if any&sT7[:t)e#c4d/Q$n
$database = "users"; //the db name4k6iWO%?,r
$timeoutseconds = 300;//timeoutseconds limit
//get the current time[I/w4iMq1cUd;c%w
$timestamp = time();!N1U!?(Q5[%E%t0P
//calculate the lowest timestamp allowed
$timeout = $timestamp-$timeoutseconds;
?>连接mysqlX'u.M^W5[#B G
mysql_connect('localhost', 'username', 'password');也允许使用变量形式。%h*F d*d#M"t1Ug
mysql_connect($server, $db_user, $db_pass);如果mysql数据库没有密码的话可以使用下面代码连接.R+DI2y!E
mysql_connect($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。O y MRW-PT
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES2}4GA?;V$HF6Mx
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");
如果用户用错误信息的话，这样处理。
if(!($insert)) {E'XE@7h^&T9v Z
print "Useronline Insert Failed > ";c)x3L$E&N8|^
}然后实现当超过设置的时间就删除该用户记录。;h RLH3Ur'f,K6X"k
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");同样给出删除记录出错的处理。
if(!($delete)) {?y5l4e6A}.q'e
print "Useronline Delete Failed > ";2L8N"v8f:D4ze
}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。t`IH&e%p+y
$user = mysql_num_rows($result);最后关闭数据库。
mysql_close();显示在线的人数。(H1u;qXe
if($user == 1) {WYl\V!E6g Fn
print("1 user online\n");
} else {w;z/K"_PSzE/mF
print("$user users online\n");Z!XU^Auo
}最终把上面代码写成一个PHP文件如下。 s*f[*rG'O#jJ^4o
<?php6A'o@JX5l$n1\
//Put your basic server info here
$server = "localhost"; //normally localhost
$db_user = "root"; //your MySQL database username0IVW,h{
$db_pass = "password"; //your MySQL database password
$database = "users";.| J~1R7k
$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 lastl.Y1s-vo.~
// $timeoutseconds seconds)
//this is where PHP gets the timeb rSb4HY sJ
$timestamp = time();G9p G3spg+tQ6f
//counts the timeout, all people which have been seen last online in earlier than this timestamp, will get removed8f3W"t3U3pW @!HZhQ
$timeout = $timestamp-$timeoutseconds; LQ/GY3o3hL`-|"f
//connect to databaseci/T-Sj;}k yv
mysql_connect($server, $db_user);-B2c+dN9E-\ny0q}*{
//add the timestamp from the user to the online list
$insert = mysql_db_query($database, "INSERT INTO useronline VALUESpfC2YHZf!S h)a
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");
if(!($insert)) {p)H;i/B-B:~5B
print "Useronline Insert Failed > "; A4n&t|#CEf]SM
}3o;s~4eS-NW r
//delete the peoples which haven't been online/active in the last $timeoutseconds seconds..k/PMO]@$r1jl \&{/@[
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");+B3u&KQ(BXTG h:W
if(!($delete)) {}o;H+\#N'UqP
print "Useronline Delete Failed > ";
}
//select the amount of people online, all uniques, which are online on THIS page CA,k*\1nLk:v
$result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");+Y\9\,}D&J;jDs'?8L
if(!($result)) { G&r+?1l#D`C"x
print "Useronline Select Error > ";
}
//Count the number of rows = the number of people online
$user = mysql_num_rows($result);&o7Hc!OGS
//spit out the results-S4e\F_l6|:mSb
mysql_close();$~&O7m!i6R0{7BT7S
if($user == 1) {
print("1 user online\n");*t6To+j@RH {0o#S
} else {
print("$user users online\n");H!gv i4\
}k2B1xKN-GZ"[%]i
?>T)K#\7s3NS
[url=http://www.now.cn/vhost/][img]http://b.todayisp.com/bbs/760x90h.gif[/img][/url]J5L6XY*D@
以上代码我是在时代互联提供的免费试用主机上测试的，感觉效果还不错，性能很稳定，不信的话你也可以去试试。当然，记得指出我这个程序中的不足先哦。
时代互联是行业内最早开始提供PHP 虚拟主机的公司之一，现在已经是的金牌域名注册商和中国互联网客户满意度十佳单位，产品功能已经非常完善，特别提一下几个特有用的功能：数据库自动备份、免费集成繁简通简装版、多域名绑定、多子网站支持、GCDN 网站加速器、镜像加速、高级访问统计系统、支持WAP、可选电信/网通/香港机房。
我之前建站的时候选的是他们公司标准商务E型，因为这款机型还特别支持ASP.NET3.5(3.0/2.0/1.1)/ASP。kQX/@CP,]C$n
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_V5f9l3zv/i[:vh8j
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q%{Vu+wD9QAi!Vya
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] Z0RY Rhle"L
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]~;m#_#PD2n!~2L#a
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！