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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!M |nrc u-e1`
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。5F~m1k%` Ark7L
首先我创建MYSQL数据库表。
y'f Q\"RE.p CREATE TABLE tablename (
b![SRRD)R};U field type(max_length) DEFAULT 'default_value' (NOT) NULL
y bdy2O@;Y+y }可以使用的SQL语句。3uC&zAqxs L
CREATE TABLE useronline (2c#fBRf+x9m
timestamp int(15) DEFAULT '0' NOT NULL, I0Z LQ+u Jy$txv
ip varchar(40) NOT NULL,
`/i#mS"e m,c,zdn3U file varchar(100) NOT NULL,
1e[*{w^ PRIMARY KEY (timestamp),:w e+S aP
KEY ip (ip),x-d(w,Sh
KEY file (file)
;I2?b2gz-DK );下面我们是PHP脚本,首先我定义MYSQL的信息。
K!Sv*t3hN $server = "localhost"; //你的服务器\.P&~ ?h(e
$db_user = "root"; //你的mysql的用户名
g?qrv $db_pass = "password"; //你的mysql的密码W4y(q|4Y j6N!B2f
$database = "users"; //表的名字设置统计的时间(多少秒内在线人数)
9nI I*I?s Zn $timeoutseconds = 300;取当前时间。 FW}D7Z6T'j
$timestamp = time();上面的完整代码:
1x2y"e7H)mwhE <?phpMZZ v.r(hN
$server = "localhost"; //your server
"?,YDMk/]4zF _ $db_user = "root"; //your mysql database username
Kri.cN-e1N t.v4O $db_pass = "password"; //your mysql database password if any7b8^2^JO
$database = "users"; //the db name
HljCr gm t $timeoutseconds = 300;//timeoutseconds limit}fE#Y5| o]
//get the current time
;M"~p3S0@9i $timestamp = time();
woWV V ~$T C4E //calculate the lowest timestamp allowedg[ F8Y%v qV#N:G G!b
$timeout = $timestamp-$timeoutseconds;k ` h]3Mc
?>连接mysqlDI k!g/V&Pm|m
mysql_connect('localhost', 'username', 'password');也允许使用变量形式。
3B bA6u#q mysql_connect($server, $db_user, $db_pass);如果mysql数据库没有密码的话可以使用下面代码连接WIZ9M&E
mysql_connect($server, $db_user);查询数据库的代码: Y8f+b0qI'uR
mysql_db_query('database', 'query');我们只要有访客就要增加一条记录。
;qT*Y g)PDq r1z $insert = mysql_db_query($database, "INSERT INTO useronline VALUESKr'X r:?(x&d
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");R/EzH1P4~8ZQ
如果用户用错误信息的话,这样处理。
9y`2oU5L nI K if(!($insert)) {WO;u$@U} nO
print "Useronline Insert Failed > ";
_-C{t `7DJ(o8q }然后实现当超过设置的时间就删除该用户记录。9X8orIQ(gV y,L
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");同样给出删除记录出错的处理。m0K.UxW
if(!($delete)) {
Y'Y(DS@9U%A:lLI print "Useronline Delete Failed > ";
F7O_ C h)A }下面我们解决数据库中不同IP的问题
htV5vY$] $result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");使用
8Ym8o5G1aWb)p mysql_num_rows(query);来统计用户,代码如下。|AkCQba
$user = mysql_num_rows($result);最后关闭数据库。
j+c"b H ] mysql_close();显示在线的人数。 GJ&A#me |`,r
if($user == 1) {
c:J7\ P2|&K'dkf:t4se print("1 user online\n");3y c'{_\7_Z
} else {:PhHU As
print("$user users online\n");
X{T*\8g }最终把上面代码写成一个PHP文件如下。
NFR5hp\+jd6d <?phpGds;y VW
//Put your basic server info here;[-@8[6y_t7H
$server = "localhost"; //normally localhost%SYk^1x}
$db_user = "root"; //your MySQL database username
yr z,ZrX$h $db_pass = "password"; //your MySQL database password7P` x*Xe5x
$database = "users";*I9y8]c[/UQ8tq
$timeoutseconds = 300; //it will delete all people which haven't refreshed(so probbably are7w wi8Q&{l7f&q]fPI
// offline or inactive) in $timieoutseconds time (so it actually checks the people that are active in the last
;C?{(y(x#F i // $timeoutseconds seconds)/c$P&].v])CG
//this is where PHP gets the time
Gxj5[t i $timestamp = time();
@'HS c#M Y //counts the timeout, all people which have been seen last online in earlier than this timestamp, will get removed
v-ML HNqLU} $timeout = $timestamp-$timeoutseconds;
:^"Z Iz1[$j7B //connect to database
~c(@ u!ceS mysql_connect($server, $db_user);4u%B fo,e.|zc
//add the timestamp from the user to the online list
q.{q9g/Nz $insert = mysql_db_query($database, "INSERT INTO useronline VALUESk MJ$R!D$i0s6V
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");
"~,U!}*nud if(!($insert)) {6]f6yR3f4b
print "Useronline Insert Failed > ";(u6C?z7|l
}
[6oK`mT W5z //delete the peoples which haven't been online/active in the last $timeoutseconds seconds.
6`:AWq Zk $delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");
0i}4r@MW(L,nYL*h#s if(!($delete)) {
I/J[?e \c print "Useronline Delete Failed > ";
&Bw[ N ]!_1rJ }(?.lC6Xn,QF
//select the amount of people online, all uniques, which are online on THIS page
(h6l8Bg9z/JF;I $result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");3a,T'n L F Q
if(!($result)) {J&QG/I@oU0vJOK
print "Useronline Select Error > ";
fV|-@7_ }
bza+JM V*W //Count the number of rows = the number of people online
s+c|Ve K;W8j5} $user = mysql_num_rows($result);+n&} Ta9W(@"]A9r)U
//spit out the resultsuB e FR+X
mysql_close();
0^iA({g3r if($user == 1) {
6x1?'W)OcJ print("1 user online\n");
| `!{"M|-R3j7z1? } else {
'q'S \?Y print("$user users online\n");
"u'G*QWnv*| }}BmG,Nq
?>
+fO2j(@3c"o [url=http://www.now.cn/vhost/][img]http://b.todayisp.com/bbs/760x90h.gif[/img][/url])m.`ZF&M{Y1qO
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。 X\7\@KCx
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。
iuJfC4] 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。N"V O+L.v1[0e
当然啦,这两款主机也是相当不错的。%~V4Un,d
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"R/{xo$b
标准商务B型:Unix /Linux 操作系统+独立网页空间500MB+送800MB邮局空间+60MB MySQL数据库空间=1365元/年6v3oYNwx G,y cG$R
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]
Q_,{l"e2B'Q:E_ 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]#P gIiYj)C#ktr3g
自己加QQ去问吧。

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