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！
7rZ ?$Wd` 我是用PHP+MYSQL来写的，原理：网站在线人数的程序代码+后台有MYSQL数据库支持，可以直接统计出网站当前的在线人数。
#z:Gp C_FX 首先我创建MYSQL数据库表。
@t8{YM}`k a CREATE TABLE tablename (
a)@9Z(vB ] field type(max_length) DEFAULT 'default_value' (NOT) NULL
ay:y[~1j$[vj[k!s+d }可以使用的SQL语句。
0c lN;FY(N CREATE TABLE useronline (
~F1pD1}.IX timestamp int(15) DEFAULT '0' NOT NULL,
&ylx7_U\?kW7|/T ip varchar(40) NOT NULL,
8K/X @H"p-|.r?"k ]z file varchar(100) NOT NULL,ykFpV'^
PRIMARY KEY (timestamp),3TPZz7^g
KEY ip (ip),Mw]!Zr Q3p Z
KEY file (file)&I+~^ Y5Q tB!a_
);下面我们是PHP脚本，首先我定义MYSQL的信息。
iOvX6Z1tg
_ $server = "localhost"; //你的服务器
p8}fx@5~3v,T $db_user = "root"; //你的mysql的用户名I/M!o4D!D_
$db_pass = "password"; //你的mysql的密码
b#][(P(V$X $database = "users"; //表的名字设置统计的时间(多少秒内在线人数)
0CLLE"hM]5I8B $timeoutseconds = 300;取当前时间。
$pIY)s'~$}.o $timestamp = time();上面的完整代码：
n?o_#PD|J,Y$b <?phpH\Q(}3AsV
$server = "localhost"; //your server
$Dw,`
GY,C Cy1t(O9RK $db_user = "root"; //your mysql database usernameG8\.j_7l`;n
$db_pass = "password"; //your mysql database password if any
]!I ve"I $database = "users"; //the db namebE0`V_)y O2F!A
$timeoutseconds = 300;//timeoutseconds limit
k
g ?.R1m3IM#pN //get the current time
.Y R;~;f:Y8u $timestamp = time();`})l^FI1{X
//calculate the lowest timestamp allowed{i0f%S e~@ n
$timeout = $timestamp-$timeoutseconds;
Db-In x{5QG ?>连接mysqly&T IlD}
mysql_connect('localhost', 'username', 'password');也允许使用变量形式。;a'd?$T3Gta L
mysql_connect($server, $db_user, $db_pass);如果mysql数据库没有密码的话可以使用下面代码连接
:w8e-I-X9HntljL6o mysql_connect($server, $db_user);查询数据库的代码：
gLD#s fj mysql_db_query('database', 'query');我们只要有访客就要增加一条记录。4Z9j lkV&|,q
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES8m$qpOa+EY
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");
$Hhmmt5D3_R 如果用户用错误信息的话，这样处理。nwb1\C
if(!($insert)) {s^X*rK Ju[
print "Useronline Insert Failed > ";
/Jm*i'Hk:b }然后实现当超过设置的时间就删除该用户记录。
?
B4Y)gH)F!} $delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");同样给出删除记录出错的处理。DBOf L%N!^9j
if(!($delete)) {_)z%r2j&dUF
print "Useronline Delete Failed > ";*k fc7K{
}下面我们解决数据库中不同IP的问题Q1q^t1N1VE
$result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");使用
r'QrhS'J!eJae mysql_num_rows(query);来统计用户，代码如下。
nxn,u M8D6l{xn+c/a $user = mysql_num_rows($result);最后关闭数据库。
d;N_YWG mysql_close();显示在线的人数。cFy$Z9m!M2S9E
if($user == 1) {
_[$j5Qpm,[? print("1 user online\n");
.FDk(WtB } else {
D'O2{7o}^ print("$user users online\n");
H+t)|7@4o)Z(X }最终把上面代码写成一个PHP文件如下。
*AGvk4yO;H o <?phpn&}^)q'Id p
//Put your basic server info here
%W5M@ vZp $server = "localhost"; //normally localhost:F-M:^5l2UX){0b
$db_user = "root"; //your MySQL database usernameV*GB;~h2|%i4qI
$db_pass = "password"; //your MySQL database password
r7nO.~`#o,Y*q $database = "users";
8ra"}:r,G1q $timeoutseconds = 300; //it will delete all people which haven't refreshed(so probbably are
9?(oaP6H:p!a // offline or inactive) in $timieoutseconds time (so it actually checks the people that are active in the lastuO LM^bJB
// $timeoutseconds seconds)
;W9e"E5{ v[Y //this is where PHP gets the time
;G}Yt:CUK.O $timestamp = time();E!pncu:o_t'L#]
//counts the timeout, all people which have been seen last online in earlier than this timestamp, will get removedr"}J)VP#A*FA
$timeout = $timestamp-$timeoutseconds;
kf%s^7x!B[X-L} //connect to database
,j[a#R-Ao mysql_connect($server, $db_user);
b"n.Q8W6`Mta!UvmO //add the timestamp from the user to the online listW0i(g'd+tV9R
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES
6tJ^"^r_g ('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");
-e2H0VN?FKj] if(!($insert)) {,|3G8Ti.sAvV
print "Useronline Insert Failed > ";
fT4BZn }IP)bl3{GOjt
//delete the peoples which haven't been online/active in the last $timeoutseconds seconds.6mbs"a;lDU)].Y5f
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");.N#A!]?7Q9w ^$E
if(!($delete)) {v1Lk;gF.Qg
print "Useronline Delete Failed > ";!oK%@ytA"iN
}
!M!hb&v"\^ //select the amount of people online, all uniques, which are online on THIS page*PY:Ic8s8W
$result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");}n%U2G*teTO.|
if(!($result)) {
Tr;KUM.Ev r{d print "Useronline Select Error > ";
s.g6wV'y;V(F }2{q&G&Snt$`7?c L
//Count the number of rows = the number of people online2y*h6f9u{Vkf
$user = mysql_num_rows($result);
*U-~'J3h j~.bP6J //spit out the results1YA+[i)Y4j4p;o:l;H
S
mysql_close();9x]d0a$LE,R*SF:I
if($user == 1) {
U iI-z
g4y` print("1 user online\n"); F
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} else {AAaJ"]6L
print("$user users online\n");
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[url=http://www.now.cn/vhost/][img]http://b.todayisp.com/bbs/760x90h.gif[/img][/url] {9D!A:|8r Z-e/J
以上代码我是在时代互联提供的免费试用主机上测试的，感觉效果还不错，性能很稳定，不信的话你也可以去试试。当然，记得指出我这个程序中的不足先哦。fF9QnP P8it8Q
时代互联是行业内最早开始提供PHP 虚拟主机的公司之一，现在已经是的金牌域名注册商和中国互联网客户满意度十佳单位，产品功能已经非常完善 ，特别提一下几个特有用的功能：数据库自动备份、免费集成繁简通简装版、多域名绑定、多子网站支持、GCDN 网站加速器、镜像加速、高级访问统计系统、支持WAP、可选电信/网通/香港机房。
5W5e5N5jY$@2z 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。,E/om `R`m*K(n
当然啦，这两款主机也是相当不错的。
!l3Q-M*i%VM[y 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
z,B$i'yc@0} Rg.E 标准商务B型：Unix /Linux 操作系统+独立网页空间500MB+送800MB邮局空间+60MB MySQL数据库空间=1365元/年1`F1_$W,{#{f)l
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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]
!N6T1u&c$]e M6I A+Sox 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]
H-|Z5TH g 自己加QQ去问吧。

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