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！
*{&UzB6f+B&W$ZT 我是用PHP+MYSQL来写的，原理：网站在线人数的程序代码+后台有MYSQL数据库支持，可以直接统计出网站当前的在线人数。 ?NQ4H*kI6U
首先我创建MYSQL数据库表。
F)y-_*w_-UN'f%|Be CREATE TABLE tablename (J3sf)Sd k!x`b
field type(max_length) DEFAULT 'default_value' (NOT) NULLp vJ(h(T
}可以使用的SQL语句。*\#r2]ANX&R
CREATE TABLE useronline (@&A o~?
timestamp int(15) DEFAULT '0' NOT NULL,
T:@P
F/B ip varchar(40) NOT NULL, lp2y$|'wL-Q2u
file varchar(100) NOT NULL,&koU8W.v&pC
PRIMARY KEY (timestamp),
D#Ctt1gQ KEY ip (ip),({T\dh
KEY file (file)8y!OPa/iwc
);下面我们是PHP脚本，首先我定义MYSQL的信息。WMn]*O(pK
$server = "localhost"; //你的服务器
TUE^C WA(z-CU0Z $db_user = "root"; //你的mysql的用户名
9wTu
C0Z$om,g+tn\ $db_pass = "password"; //你的mysql的密码%NM#`^K;W6]+z+X
$database = "users"; //表的名字设置统计的时间(多少秒内在线人数)
R!Vldg e^ $timeoutseconds = 300;取当前时间。MM%dm/o5Pk
$timestamp = time();上面的完整代码：
#Z.}Kx#uAD1B@!u(l6XF <?php
7rG)P2j5mYb-ny i}zS $server = "localhost"; //your server3Rz'Cb5I"L
$db_user = "root"; //your mysql database username1b3Q&NG RGR#Ps*oA
$db_pass = "password"; //your mysql database password if any
"g6?!k:s;SN $database = "users"; //the db name
7Y?M)z-Kw@4T+OB $timeoutseconds = 300;//timeoutseconds limitu~6M,V7rM5A
//get the current time0a`*N]}]l(r@y
$timestamp = time();#ZF!?p;he)Q1q-e3g
k"d
//calculate the lowest timestamp allowed
sfx? Z,] $timeout = $timestamp-$timeoutseconds;_E\V1{S g5F
?>连接mysql-v'E3m5L Txo{V;N
mysql_connect('localhost', 'username', 'password');也允许使用变量形式。$~"Ga;TIB
mysql_connect($server, $db_user, $db_pass);如果mysql数据库没有密码的话可以使用下面代码连接
s)GW,Mqk#C mysql_connect($server, $db_user);查询数据库的代码：R^R3V%{,uVn[
mysql_db_query('database', 'query');我们只要有访客就要增加一条记录。
QLbd'?,V,@ $insert = mysql_db_query($database, "INSERT INTO useronline VALUES
#Q6D+|HNZMe"p ('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");
K2l:N1d7BI)P 如果用户用错误信息的话，这样处理。
;g3_h*H1H3m d if(!($insert)) {
e;N[UI\h print "Useronline Insert Failed > ";D{3\$v{]
}然后实现当超过设置的时间就删除该用户记录。
z,BH0ZwR-yk(~ $delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");同样给出删除记录出错的处理。Q9H2a9p+`n;|c$VF{
if(!($delete)) {
b8Px~"t#}6z8hN print "Useronline Delete Failed > ";&NC`+O6Q%@
}下面我们解决数据库中不同IP的问题 [1~)aW,x8Pi
$result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");使用D4_.r3z1cw
mysql_num_rows(query);来统计用户，代码如下。
.Y'L$W:TD4G2m)L $user = mysql_num_rows($result);最后关闭数据库。
3}2a#C-WzQ {LPL y mysql_close();显示在线的人数。
?N_!w^3sPq*xP if($user == 1) {
AJp!c
P(te print("1 user online\n");T+}FC"Hc
} else {
`OB~ z x5FfR9k print("$user users online\n");V/xb,Vt0l/f)I
}最终把上面代码写成一个PHP文件如下。+AG {7q6yB
<?php#n?7@?F2ry*d$A5A5O
//Put your basic server info hereM}SdX
$server = "localhost"; //normally localhost
(a^,]*iVQ/k $db_user = "root"; //your MySQL database username"gol/Wj u\;f
$db_pass = "password"; //your MySQL database password
T
{B&\?Ef2G $database = "users";3id4|aw H.V1R5S
$timeoutseconds = 300; //it will delete all people which haven't refreshed(so probbably are^ q.l9qt
bn5XJO
// offline or inactive) in $timieoutseconds time (so it actually checks the people that are active in the laste1_Cv2wC
// $timeoutseconds seconds)7h"L&Z YE
//this is where PHP gets the timeTK%}.B2Ee;Y6s^qV
$timestamp = time();[~1B5j0fp$mWSM
//counts the timeout, all people which have been seen last online in earlier than this timestamp, will get removed#Kc#R)P(}4H&k
$timeout = $timestamp-$timeoutseconds;r T;~C(ID
//connect to database
}$N;E)YKw8\!Rp
o mysql_connect($server, $db_user);
/} ``5H$kH
O //add the timestamp from the user to the online list
aWAzn[ $insert = mysql_db_query($database, "INSERT INTO useronline VALUES?W:MOE Wt
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");
0@u3js q/^ if(!($insert)) {{^9o*l:Z5W
print "Useronline Insert Failed > ";
%LlxQ;~0K }d[BXy2J
//delete the peoples which haven't been online/active in the last $timeoutseconds seconds.
/o2V7_!}s,w:BO.F $delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");F&?ViN-ap*{*H
if(!($delete)) {
fED;r6O1ZP print "Useronline Delete Failed > ";;L6d]#fG*?y cl
}
"a@CJ@ //select the amount of people online, all uniques, which are online on THIS page
^ Q-{)A$C+E!M b+X $result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");
4O"O3oH {^$F if(!($result)) {@sT8KS,I|
print "Useronline Select Error > ";3Bj3q(}ep
w
}x4{;NmF4`
//Count the number of rows = the number of people online
G4U+hD$O,R7j}yM,U $user = mysql_num_rows($result);

HA5n FGO| //spit out the results
(mc6Ak/G"O}.A mysql_close();
,\[7Q'c1\T4^E if($user == 1) {
A&H6KF*g
~ y8VnSo print("1 user online\n");
Z0fF!s S } else {i4q)NU3}1QIGv
print("$user users online\n");X7idy%ocK
}
v|&a9E0^
F ?>Is4Ks{
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"W_L}%Sldd@r 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。
KI},n
}I4qb 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。
cY}7gw5Zp 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。)BOt5_0U?'v-o(^
当然啦，这两款主机也是相当不错的。3|,BTs;BO LC
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
!s-brI7tv 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
HQH5]Z!d 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] HT
MR8{0MRA
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_$xkth
N7I 自己加QQ去问吧。

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