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！c|4TX1z/B,Y0Ol
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。
2V&fLqi`.G 首先我创建MYSQL数据库表。.CQxz:H'Sz)`'_
CREATE TABLE tablename (
:IKaeZnA field type(max_length) DEFAULT 'default_value' (NOT) NULLK{7cs&T]
}可以使用的SQL语句。
S:jqb$o)F(Rj CREATE TABLE useronline (
.bhT2h4HC }EKZ timestamp int(15) DEFAULT '0' NOT NULL,
h"cb6ZX2EjPO
ip varchar(40) NOT NULL,i7F!q!Q0R0};gS+r$e3Fh
file varchar(100) NOT NULL,
WF'n"j,G)?(Or? PRIMARY KEY (timestamp),
Qu0@C0hR:s%Y KEY ip (ip),|.Ak'E a.Th
KEY file (file)"B,d w L7k'kEO` e
);下面我们是PHP脚本，首先我定义MYSQL的信息。tmcIl;j&yL
$server = "localhost"; //你的服务器%u)X!M*o6A$C
$db_user = "root"; //你的mysql的用户名1k5u:V@@A
$db_pass = "password"; //你的mysql的密码
8k5p?vJ6v![c $database = "users"; //表的名字设置统计的时间(多少秒内在线人数)
.C)J h.a*g0LR.?@F $timeoutseconds = 300;取当前时间。2W l]"};R3UiM$@
$timestamp = time();上面的完整代码：
\S%H REo <?php
$Uz}!Q6~{.C#z $server = "localhost"; //your server^Q:W r"~
$db_user = "root"; //your mysql database username
0cA { Q"o o $db_pass = "password"; //your mysql database password if any$P!KADZu_
$database = "users"; //the db name'{M-u |8@*hx
$timeoutseconds = 300;//timeoutseconds limit*d[$j%B!vtP
//get the current time
5N4H%Qjz v&B $timestamp = time();
wR:bp
@j^#U //calculate the lowest timestamp allowed'n~`"q{2?tu
$timeout = $timestamp-$timeoutseconds;
%P{]'ar(m ?>连接mysql5E4Wt#](~Td*}e
mysql_connect('localhost', 'username', 'password');也允许使用变量形式。fHtu@mh!e
mysql_connect($server, $db_user, $db_pass);如果mysql数据库没有密码的话可以使用下面代码连接
&_O5i$uY5Cd mysql_connect($server, $db_user);查询数据库的代码：
9l#u[&oc/c Y0] mysql_db_query('database', 'query');我们只要有访客就要增加一条记录。WjCk-{ZK
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES9t`-R*~{)~^3X,~
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");-[r,?p4YC`5Z
如果用户用错误信息的话，这样处理。
Ma0A t7tc j if(!($insert)) {
$Z.G|OC.Q print "Useronline Insert Failed > "; WoR Fp`
}然后实现当超过设置的时间就删除该用户记录。
7ScF,wSw!z_t $delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");同样给出删除记录出错的处理。
8X/e*} M~g,m if(!($delete)) {
U(PvQN^z print "Useronline Delete Failed > ";Cpm1@l"fpi
}下面我们解决数据库中不同IP的问题%D8L&b(W"J$]
$result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");使用B%x9K h8bE"~
mysql_num_rows(query);来统计用户，代码如下。
;DQ~t~0JH)dA*kK $user = mysql_num_rows($result);最后关闭数据库。
\Byf-e/yL9h4yo mysql_close();显示在线的人数。
"kJV%`m \8s/P if($user == 1) {
Wz`*UTLyig4V*G print("1 user online\n");2ay @IH6ynj%Z,X'Uw
} else {
j,T4LFa
fD print("$user users online\n");A'A-uz,X"kY]
}最终把上面代码写成一个PHP文件如下。
.i9TOr{M <?php
] ? OC(p^
r{B //Put your basic server info here
/S q:}r/v1^+M-j`} $server = "localhost"; //normally localhost#@2og&EX2z%Rs
$db_user = "root"; //your MySQL database username[I4K&@]j_A j
$db_pass = "password"; //your MySQL database password#~O\d!D}I
$database = "users";
?-~E0\F| $timeoutseconds = 300; //it will delete all people which haven't refreshed(so probbably are
%I1Y;@&mh // offline or inactive) in $timieoutseconds time (so it actually checks the people that are active in the last
I9p(s~p-e // $timeoutseconds seconds) cq0UQO2y0eC9t0rc
//this is where PHP gets the time6{];b'Fh1k
$timestamp = time();"[6SZh5x
{6?K `,e?
//counts the timeout, all people which have been seen last online in earlier than this timestamp, will get removed
;O3] rIu qZN(glBt $timeout = $timestamp-$timeoutseconds;N!N*d7bu~6h}%o
//connect to database{3bP){
B
mysql_connect($server, $db_user);
6x+[2f,E1WFO //add the timestamp from the user to the online list
pp6tM*^'Y $insert = mysql_db_query($database, "INSERT INTO useronline VALUES
F2V%JiXY ('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");
TstLA+p/j*RIb;P if(!($insert)) {
?$kr)Lx print "Useronline Insert Failed > ";
noK$rgHN
}
0tD(nae5c9|U!v //delete the peoples which haven't been online/active in the last $timeoutseconds seconds..H/E/l;kin
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");V1UYy){4]fB
if(!($delete)) {
3|&I`@oQ8^Q-Z:k-u print "Useronline Delete Failed > ";
5Vz?7D;r }
4D H*ALw#e //select the amount of people online, all uniques, which are online on THIS pageF8{M7^)j7jp
$result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");m
]D6C[}:u
if(!($result)) {n`9nP,d JlFl[Y
H
print "Useronline Select Error > ";9_%^H2\c%B;Z'P
}
G#a4KAY(ftY'k //Count the number of rows = the number of people online
(J)VPBh $user = mysql_num_rows($result);qgc2_ ^]u5Y0D
//spit out the results
'snsfL [ t&A.T!G mysql_close();
-Q"Q D#Xtt,e#I if($user == 1) {2KMpzm(J6Ib&j
print("1 user online\n");
,OD7M;e0`.S-_1i9c } else {
'JSuS8u&a@
l print("$user users online\n");"r_Bcd1bY]
U O
}
$^n&]S)o ?> F#oj;Xfiw1kh R ?
[url=http://www.now.cn/vhost/][img]http://b.todayisp.com/bbs/760x90h.gif[/img][/url]iT9[!\PV/Q6|
以上代码我是在时代互联提供的免费试用主机上测试的，感觉效果还不错，性能很稳定，不信的话你也可以去试试。当然，记得指出我这个程序中的不足先哦。ge%Uzn|C1a
时代互联是行业内最早开始提供PHP 虚拟主机的公司之一，现在已经是的金牌域名注册商和中国互联网客户满意度十佳单位，产品功能已经非常完善 ，特别提一下几个特有用的功能：数据库自动备份、免费集成繁简通简装版、多域名绑定、多子网站支持、GCDN 网站加速器、镜像加速、高级访问统计系统、支持WAP、可选电信/网通/香港机房。4ucJf-jp#\4~6oA5\
我之前建站的时候选的是他们公司标准商务E型，因为这款机型还特别支持ASP.NET3.5(3.0/2.0/1.1)/ASP。
M,X j
D(Y Y 当然啦，这两款主机也是相当不错的。(sA,T ?$a.l#_
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Y7KDt K1DDz9_
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H$]-Tr#uSZ2^(DD
提供一下这个公司的联系方式：请见：[url=http://www.now.cn/vhost/]http://www.now.cn/vhost/[/url] hu8G)v$PVY
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]

f0P4?n+Zd)K$U 自己加QQ去问吧。

查看完整版本: 刚用PHP写了一个网站在线人数的程序，请大家进来指点下！