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！/\/]y#C;\cB6g7T.B_r
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。o,w fwW)l
首先我创建MYSQL数据库表。3o,S!N3cv/n)Z l+w
CREATE TABLE tablename (
"fP*V^,gOqkj field type(max_length) DEFAULT 'default_value' (NOT) NULL
_6T$_zV&ZTf }可以使用的SQL语句。
,y|P;}Whk;v CREATE TABLE useronline (O"yO1j'C3R-A$h
timestamp int(15) DEFAULT '0' NOT NULL,t5E?"nW.E8I
ip varchar(40) NOT NULL,4K}&mb*}%xr
file varchar(100) NOT NULL,
p$z0p"a"uht8\#t4@ PRIMARY KEY (timestamp),*X/G0mL]%F0s6V6c!u
cR
KEY ip (ip),fJ?U5M]
KEY file (file)
u^ n O`Lv );下面我们是PHP脚本，首先我定义MYSQL的信息。
/\9@G E']M8v#P $server = "localhost"; //你的服务器
u nI)c)Tt6j$f4C $db_user = "root"; //你的mysql的用户名(ob0Atn:y(mAVWc
$db_pass = "password"; //你的mysql的密码1Q-MO5`(_yj
$database = "users"; //表的名字设置统计的时间(多少秒内在线人数)
`5w\TFM $timeoutseconds = 300;取当前时间。+H([8bn'}Or8]6|[
$timestamp = time();上面的完整代码：
%W3BNe9SF <?php(K f#F'Ue"F4?
$server = "localhost"; //your server;H7jK-w/tC1cA"a
$db_user = "root"; //your mysql database username
E6k0A0\s`,j $db_pass = "password"; //your mysql database password if any}o^q%_S9V{*_ Xa
$database = "users"; //the db name
9K-o ~5u/L?2e $timeoutseconds = 300;//timeoutseconds limitS)c4`j1Upz
//get the current time
4S2@)qUA*J $timestamp = time();
@$X%e YtL //calculate the lowest timestamp allowedv.I)kVr
$timeout = $timestamp-$timeoutseconds;j4}?T G2VG7q
?>连接mysql
E K} H8Y mysql_connect('localhost', 'username', 'password');也允许使用变量形式。
*s"Y D&b8`9Dy mysql_connect($server, $db_user, $db_pass);如果mysql数据库没有密码的话可以使用下面代码连接+^7Y6?C$y)K-L)?H
mysql_connect($server, $db_user);查询数据库的代码：
"y1ou#M"v| {!hO mysql_db_query('database', 'query');我们只要有访客就要增加一条记录。
aU:]aL's~;M5b$@Gp5c $insert = mysql_db_query($database, "INSERT INTO useronline VALUES
~/aSUr&v-B ('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");
6Gu} m"GSf+U T 如果用户用错误信息的话，这样处理。
8u f$P1^%ug;cI if(!($insert)) {r+V1I2~&E:e
print "Useronline Insert Failed > ";@U0@.u8bG?p
}然后实现当超过设置的时间就删除该用户记录。q:f;D
x\.l-f1e+{)k7g
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");同样给出删除记录出错的处理。6i$}a#Nv ICk
if(!($delete)) {/|?-T7M6En(H J2g
print "Useronline Delete Failed > ";
@E~F-dN }下面我们解决数据库中不同IP的问题
#vG3FOc R $result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");使用6Hr*VEH%ofT(g
mysql_num_rows(query);来统计用户，代码如下。
%j
]Z6ld9\ $user = mysql_num_rows($result);最后关闭数据库。
'ej}0c`z ] mysql_close();显示在线的人数。
izS8T_{
H3` if($user == 1) { qP5]$i&s1t
print("1 user online\n");.H:FC3dP t C1Rx
} else {
/X9qKa!|!^&V*DV9U2q!g print("$user users online\n");!?r^)Z-g|s)T
}最终把上面代码写成一个PHP文件如下。
uT!^3B#TB <?php
t8| H0JV R0S)R //Put your basic server info here
[J!PKx%t{:f $server = "localhost"; //normally localhost
#`-xd$pyLp:\I*\ $db_user = "root"; //your MySQL database username
'CH'K z*l1Q $db_pass = "password"; //your MySQL database password
1~i T]Sf $database = "users";.A-I3C%QDo
Ee5fkb
$timeoutseconds = 300; //it will delete all people which haven't refreshed(so probbably are;kZ ?v/pm-k&?e
// offline or inactive) in $timieoutseconds time (so it actually checks the people that are active in the last.e9w A2yB%\2X#a{
// $timeoutseconds seconds)ge]m&U _
//this is where PHP gets the timenOenT
E_
$timestamp = time();
)Iay^n)t*q //counts the timeout, all people which have been seen last online in earlier than this timestamp, will get removedt&omlL'VM)l&U
$timeout = $timestamp-$timeoutseconds;(GZl,L3fE*v
//connect to database
1q-u n0]4\6@[ mysql_connect($server, $db_user);#U7jN,s8F k~2N$s
//add the timestamp from the user to the online list
w{o
]b/sN"t $insert = mysql_db_query($database, "INSERT INTO useronline VALUES
)D.e;y}:G @%v5B%sr] ('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");Z;Sa_o#D
if(!($insert)) {d8m
_,V}
print "Useronline Insert Failed > ";
&~x(Jq\+y.pU/f:? }
'l S5iv+Vg,@ //delete the peoples which haven't been online/active in the last $timeoutseconds seconds.
$](S*H]/^'L$n $delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");
*q9lV-T;]V] if(!($delete)) {,Y*S)z\/d:gp
print "Useronline Delete Failed > ";8W[~2|LQ| ZT%t
}
K1C6\ s+xwvoCT}f //select the amount of people online, all uniques, which are online on THIS page
"@7O z5_` $result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");
Oyq(B+k/u`k6UN if(!($result)) {
-s'Y/S]4|Ws print "Useronline Select Error > ";Zf|3k_%wq
}
~mDZrF"|}C0og //Count the number of rows = the number of people online
pq.j lz/q
OU $user = mysql_num_rows($result);|#bAM)yq/`@/j]
//spit out the results
$dK r S`t5w/]@ mysql_close();
d4Bh _"|0oF+Z if($user == 1) {
:y2r
|*WXkVe print("1 user online\n");-e@v}h6\8dF
} else {&|
a7\b D@ yvS
print("$user users online\n");
"wh,Qha1?y }
h8@2bBf
HZ ?>? y{}I{e
[url=http://www.now.cn/vhost/][img]http://b.todayisp.com/bbs/760x90h.gif[/img][/url]
t uX+y3M^ 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。
%NQT5O*}.X 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。
5c4a{
}:bt4U.?d1M8fc 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。Yr2T,@W3iM
当然啦，这两款主机也是相当不错的。p%`R'|*`
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&de:pEUv 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(S!_2SrC}V+z5T
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]
fH-N.@I;[+m8} 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]
o4vs)R1@wIFa 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！