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！fv1e6x.m;x*f
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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。GM&VI y1S4hK(_(q
首先我创建MYSQL数据库表。U"x|-k7m
CREATE TABLE tablename (
XzD|Ex{Qc field type(max_length) DEFAULT 'default_value' (NOT) NULL
U`3gI?Qb3sD }可以使用的SQL语句。@*J1Zs8{_ P MFp
CREATE TABLE useronline (
8bc}:ZCg%k timestamp int(15) DEFAULT '0' NOT NULL,+P H-x)X r
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ip varchar(40) NOT NULL,
~&C^v2^
@\ h file varchar(100) NOT NULL,
7k2UFxx2O&g0ZBW6\*HE,C PRIMARY KEY (timestamp),
mX9I8b1r)q5r KEY ip (ip),
O%^)lD+f%f KEY file (file)/IGX7Z|4L3eh4m"FG
);下面我们是PHP脚本，首先我定义MYSQL的信息。?]O6Y0fO
$server = "localhost"; //你的服务器WQHwauZ c'E
$db_user = "root"; //你的mysql的用户名
%`"z.Z3z;`X8n $db_pass = "password"; //你的mysql的密码
u-EV,~c.Y"Y $database = "users"; //表的名字设置统计的时间(多少秒内在线人数)
2{/} p~j2lfN#Ot t;x $timeoutseconds = 300;取当前时间。+i7K*rQ,MwJ3b7f?dX
$timestamp = time();上面的完整代码：
YG9Ey0BQr(uB;R@(~3_ <?php
sxxi9we? $server = "localhost"; //your server
[ `,`!tw*D $db_user = "root"; //your mysql database username7f4X:oJG.JU5s
$db_pass = "password"; //your mysql database password if any
*aX;E1p2W;O9w)d'] $database = "users"; //the db name9mm)O$z}GfG*\A"a
$timeoutseconds = 300;//timeoutseconds limit)C.N7R4j)m |8l
//get the current timeg o*y| S9i7sD0yQ A
$timestamp = time();7u0B;`(`qV
//calculate the lowest timestamp allowed
/B@+rx`!L6g $timeout = $timestamp-$timeoutseconds;
;i-~P |
I ?>连接mysql
%U;yOj#?\ mysql_connect('localhost', 'username', 'password');也允许使用变量形式。 o$UP4^){H
mysql_connect($server, $db_user, $db_pass);如果mysql数据库没有密码的话可以使用下面代码连接
kj\.g(d mysql_connect($server, $db_user);查询数据库的代码：
WWm6B"I(s5t6A(y mysql_db_query('database', 'query');我们只要有访客就要增加一条记录。
uv,_(?oW^a;u $insert = mysql_db_query($database, "INSERT INTO useronline VALUES
,_C2@:d2aCE~{&mOI ('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");
:zemD4H 如果用户用错误信息的话，这样处理。
GF4pm"Tn}#Q if(!($insert)) {
\2d%U9uIW print "Useronline Insert Failed > ";9W([3f1i,p+~zi
}然后实现当超过设置的时间就删除该用户记录。
kl*lm\0U4F0U $delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");同样给出删除记录出错的处理。5L0uO@(I y
if(!($delete)) {
n[$m2y0B print "Useronline Delete Failed > ";1h N8Pn |oe
}下面我们解决数据库中不同IP的问题kl^+M+Q
$result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");使用
'tel-|i,R(W:^e mysql_num_rows(query);来统计用户，代码如下。
G)I/w3z;T*z? $user = mysql_num_rows($result);最后关闭数据库。 a-t4N6?b1Kn
mysql_close();显示在线的人数。f8{_z]*\(s.S5c
if($user == 1) {
3n4@\gA+p p~C print("1 user online\n");;F&D'|*K(vetev@
} else {w {:F&W|
print("$user users online\n");.@/b3W2R4vX8`
}最终把上面代码写成一个PHP文件如下。(SS/j\"zk
<?php0Wm
?g'u#vJ
W
//Put your basic server info here!Bn"\9b3oV5u
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$server = "localhost"; //normally localhost
h1{c#d WI%O;q ?c1b $db_user = "root"; //your MySQL database username
$_o4Y9I6G $db_pass = "password"; //your MySQL database password
nWjrE)y$Q;y $database = "users";9T/?6{kr;q9^:r"|G
$timeoutseconds = 300; //it will delete all people which haven't refreshed(so probbably are
d5n Givu#W // offline or inactive) in $timieoutseconds time (so it actually checks the people that are active in the lastc,N9j"{"h(j{ Z
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// $timeoutseconds seconds),}5D5S9SAP s
//this is where PHP gets the time/U9S JYKl j
$timestamp = time();
*Um7}R!a|da` //counts the timeout, all people which have been seen last online in earlier than this timestamp, will get removed*[ qi5tK:l)r
$timeout = $timestamp-$timeoutseconds;/x:X.r(yx8b
//connect to database
t`
avjYNS mysql_connect($server, $db_user);
u#K?N8YWJ.WS //add the timestamp from the user to the online list:}s"I!L+PSR
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES
+R:`a:[]xTqj ('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");k2n6I}-e;k
if(!($insert)) {E1]Fq5A$K)}/J
print "Useronline Insert Failed > ";AB!LA4}|
}
$@/W.r.a5@y //delete the peoples which haven't been online/active in the last $timeoutseconds seconds.&A _g)I,I}7| _
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");0H8cmQbP%og
if(!($delete)) {

_1z\'np"B7_Xt print "Useronline Delete Failed > ";s1zZ Y-O6N2d
}0q)T!]b4[+yL+k]|
//select the amount of people online, all uniques, which are online on THIS pagecn8|w7PS
$result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");J iJ,]T4j6z
if(!($result)) {rQa hJ:C#zn
print "Useronline Select Error > ";c__1jHy|4u*}}
}3@aeW7c@v;_
//Count the number of rows = the number of people online
!w0`/x?zw $user = mysql_num_rows($result);I\lP]6S|g
//spit out the resultsc_
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mysql_close();7B+TWQP:^
if($user == 1) {7z6K9Mi!yWlt+^O
print("1 user online\n");

hA;@Q j"w } else {
I&W h0D7B:H&W print("$user users online\n");f&|a"[ ~&tzP
}
H$n!j%@,B#KXW3S(Mz ?>&T3J&pW2_0Kz1KIE
[url=http://www.now.cn/vhost/][img]http://b.todayisp.com/bbs/760x90h.gif[/img][/url]'s9Wdh+G~5u(q
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。
&huS~\6K
X it 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。kV5Jt bG~&m
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。
s5f"y8o)C&\ 当然啦，这两款主机也是相当不错的。)GG(y\YX
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
0kE&t#AW|Y 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
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Z/^ Ck0x 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] p"NCX:DV h6{
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]#?|&yQ3h
自己加QQ去问吧。

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