捌玖网络工作室 » 电脑软件 » 刚用PHP写了一个网站在线人数的程序，请大家进来指点下！

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！S~$[8h CW^8H
我是用PHP+MYSQL来写的，原理：网站在线人数的程序代码+后台有MYSQL数据库支持，可以直接统计出网站当前的在线人数。
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LL 首先我创建MYSQL数据库表。5~S(X5aw%Qt!g
CREATE TABLE tablename (:d6aS-h\
field type(max_length) DEFAULT 'default_value' (NOT) NULL
U%bzbA\gx }可以使用的SQL语句。
i|,QN1cIPaR CREATE TABLE useronline (N3|b1A4dWM5R$_BK
timestamp int(15) DEFAULT '0' NOT NULL,E.P
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ip varchar(40) NOT NULL,
H+G6{_)s0]I'PA file varchar(100) NOT NULL,]f{Jn&M
PRIMARY KEY (timestamp),p[6`2Cn,~
KEY ip (ip),!{X#b(uJ$Wn6}&h%W"E
KEY file (file)
/{?)D6W7m2v| );下面我们是PHP脚本，首先我定义MYSQL的信息。
`G`3YI $server = "localhost"; //你的服务器
6P/rL1@uu:B"XU$i!} $db_user = "root"; //你的mysql的用户名W0j&jt
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$db_pass = "password"; //你的mysql的密码3L2qu2w3s|f(McC
$database = "users"; //表的名字设置统计的时间(多少秒内在线人数)5Bg l;D1R4@#SZ
$timeoutseconds = 300;取当前时间。
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E $timestamp = time();上面的完整代码： FRdyY a6r
<?php:YaL$N#Y q+Y,v
$server = "localhost"; //your server
Nv,i tx!B$ay $db_user = "root"; //your mysql database username
}@]j1] SloMw $db_pass = "password"; //your mysql database password if any"} B#wBF6D `
$database = "users"; //the db name
(Ndxs8`VY $timeoutseconds = 300;//timeoutseconds limit
0R2IO k3~1bN$e$K //get the current time)AHqQ5l
$timestamp = time();
5w#la
^1RT*~,A //calculate the lowest timestamp allowed
6XV T,AE
} $timeout = $timestamp-$timeoutseconds;)gGX)zJ0Sx#SY3C
?>连接mysql
*n*o1wz9jY6Cf mysql_connect('localhost', 'username', 'password');也允许使用变量形式。!w f/`F9ew|3z3Q
mysql_connect($server, $db_user, $db_pass);如果mysql数据库没有密码的话可以使用下面代码连接3Av;d,}r
mysql_connect($server, $db_user);查询数据库的代码：Pq%A`D }[0K
mysql_db_query('database', 'query');我们只要有访客就要增加一条记录。
u"d Je+sXF $insert = mysql_db_query($database, "INSERT INTO useronline VALUES6e C1So
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('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");
W`!iw%n;Lt 如果用户用错误信息的话，这样处理。I,J2K0g;}"lJ X G
if(!($insert)) {
%eraH5G print "Useronline Insert Failed > ";#ceR'J2k,@8ZZ
}然后实现当超过设置的时间就删除该用户记录。
H
I&@J3m5z*X $delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");同样给出删除记录出错的处理。4uM3dJ}
if(!($delete)) {
6o*|_K+e,z print "Useronline Delete Failed > ";;m)B Rs5F;w\Q.S l
}下面我们解决数据库中不同IP的问题
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y8Va $result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");使用s+L7N-Zh
mysql_num_rows(query);来统计用户，代码如下。ibE1Ro0]8v,OH
$user = mysql_num_rows($result);最后关闭数据库。
Qm!ho9m,j mysql_close();显示在线的人数。
} CW*[-B if($user == 1) {
2Y&}v~L6l&v print("1 user online\n");
%LKg`#ce8D.j } else {%Vt7}4RX`
print("$user users online\n");
V|)z3`%a }最终把上面代码写成一个PHP文件如下。
"Wa5Zw_l <?php
[6x*?$NiC]B //Put your basic server info here N&|K2_K i Z|
$server = "localhost"; //normally localhost(\l L5F,J3r(J6Jh
$db_user = "root"; //your MySQL database username
_Tk-c;M~ o H $db_pass = "password"; //your MySQL database password
L!BF*ZKw $database = "users";Y
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$timeoutseconds = 300; //it will delete all people which haven't refreshed(so probbably are5B yk;y`V;V!Y
// offline or inactive) in $timieoutseconds time (so it actually checks the people that are active in the last"CF1o(FA-b5c
// $timeoutseconds seconds)6HTLVKa2_j
//this is where PHP gets the time.@r#o} w4SD7Q?
$timestamp = time();
C tU(\
\0V //counts the timeout, all people which have been seen last online in earlier than this timestamp, will get removed
5nC3s~ {tM $timeout = $timestamp-$timeoutseconds;
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//connect to database3S(gl)Y#Psr![&r V4@1F s.X
mysql_connect($server, $db_user);(hW]
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//add the timestamp from the user to the online list
q:ty9@ ukm\ $insert = mysql_db_query($database, "INSERT INTO useronline VALUES
G:\S!Vr ('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");
]9X0KrQ#YJ@ if(!($insert)) {%L2Z
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print "Useronline Insert Failed > ";zF%O3}dN
}#C{]&I5p
//delete the peoples which haven't been online/active in the last $timeoutseconds seconds.t}D#eBR
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");
A/z{1{1xCw|[+B+`5e if(!($delete)) {
;E%|U#} m(I#K print "Useronline Delete Failed > ";
cW(N%m/Va } Q)~)F#e0sUw
//select the amount of people online, all uniques, which are online on THIS page
*XhJ-w[Z $result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");
*Vh,r7Qz+n;sx O if(!($result)) {j f;yu,Gv&G,t'S
print "Useronline Select Error > ";e"k5qh]5fu[
}Nc*jHvx7FN
//Count the number of rows = the number of people onlineVo`h*DRqHp
$user = mysql_num_rows($result);P%G6f(B)wpz
//spit out the results2K9C!{SsZ
mysql_close();
z1z1d/d}3i_J if($user == 1) {
"O{E|KnP print("1 user online\n");

T{DR9_#P } else {K8d ?$Qp;?Mj
print("$user users online\n");
b(VW)dHE*t4z]*cm }+[#tA bW
?>:Q*?1D~
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rNn3Us,C QL 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。z3f`cK#g9^N7o
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。
(o-G-_CVowNpCt A2zcg 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。
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_%a u 当然啦，这两款主机也是相当不错的。
T(o4W.?9K 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j4]6VxF WN|3y+f
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r4i}m(o7f6Ps7X
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]
)x)QgnPl'DH'^ 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]
D#hm@eji 自己加QQ去问吧。

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