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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!
/Z|f#X7^ 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。v1j!@R%i W$a#H
首先我创建MYSQL数据库表。6N#xMw0c:i
CREATE TABLE tablename (
&m,s"G*PL2FR field type(max_length) DEFAULT 'default_value' (NOT) NULL^"CV/nT-P$eEy)]
}可以使用的SQL语句。8w2JK6U3i?
CREATE TABLE useronline (
Q)KC4s^:F*Lo[,Y5i timestamp int(15) DEFAULT '0' NOT NULL,
Snv,~,GtP ip varchar(40) NOT NULL,1_,jT;h4I
file varchar(100) NOT NULL,
MR P-zU,`^ g PRIMARY KEY (timestamp),
(l.u#o-Y'D5Ypl KEY ip (ip),9K ]"~[2A/V&}
KEY file (file) Y[n _ G)X
);下面我们是PHP脚本,首先我定义MYSQL的信息。
J;A6yTF&n $server = "localhost"; //你的服务器
GCt3?3`H?X{oA $db_user = "root"; //你的mysql的用户名 prxVBg9q
$db_pass = "password"; //你的mysql的密码$fh%b J-W:fL8~J
$database = "users"; //表的名字设置统计的时间(多少秒内在线人数)
Q3n6y8l+mj@ f $timeoutseconds = 300;取当前时间。
&C T2dB2O/N $timestamp = time();上面的完整代码:W.e.V9fu%jC.[
<?php'EBgO }f
$server = "localhost"; //your server$O!|HG3N.v'us4k
$db_user = "root"; //your mysql database username)S)Vj1n9ysg
$db_pass = "password"; //your mysql database password if any
1sI9I:G@4{ $database = "users"; //the db name
0a1b1D2W7Rp $timeoutseconds = 300;//timeoutseconds limitC&qN6u\fDZa
//get the current time HS4Ru M
$timestamp = time();Gd*F$d hB.{
//calculate the lowest timestamp allowed
#|)u$v.}]2R#I/p7Zl] $timeout = $timestamp-$timeoutseconds;
,T"Ys+Hd ?>连接mysql#k ~~f#yU&V;G E
mysql_connect('localhost', 'username', 'password');也允许使用变量形式。,`,r1Oku]
mysql_connect($server, $db_user, $db_pass);如果mysql数据库没有密码的话可以使用下面代码连接Z&~H$p$u
mysql_connect($server, $db_user);查询数据库的代码:pA"L7O/f\3w
mysql_db_query('database', 'query');我们只要有访客就要增加一条记录。
8r H%hU+vP.r EF $insert = mysql_db_query($database, "INSERT INTO useronline VALUESdj k9o _k#o
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");
v-y+S#w7bf&H 如果用户用错误信息的话,这样处理。
7W!x"KmI.y*\(F h if(!($insert)) {%IL|t9u
print "Useronline Insert Failed > ";
l.[3[g"Tdz e7} }然后实现当超过设置的时间就删除该用户记录。
T0]m3yZ $delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");同样给出删除记录出错的处理。aq$Mi/U!o&ss
if(!($delete)) {
J8R8UlGS print "Useronline Delete Failed > ";
\-}g6alo]6X&m'I~ }下面我们解决数据库中不同IP的问题
:b2w6TU FZw W,v8E $result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");使用/V%w`"hP$N-mF|z
mysql_num_rows(query);来统计用户,代码如下。^bc3D|%} Z$m)P
$user = mysql_num_rows($result);最后关闭数据库。
RX:WR#{:H mysql_close();显示在线的人数。 AB/_`Bxj2Z/J+@
if($user == 1) {
#h IQ+k:`%Lj print("1 user online\n");)Ar)YGT4j;`W p E Z&e
} else {D0iF*UB\g.~A
print("$user users online\n");hR pq$cd8Jua+p
}最终把上面代码写成一个PHP文件如下。
.CJ)c&bVG3P6y <?phpb:qX1q0l9o+s
//Put your basic server info here M6`5W3Ld,qV#] Y:U/a
$server = "localhost"; //normally localhostW6RP-i8xgq
$db_user = "root"; //your MySQL database username!s F;q f%\3f$`z
$db_pass = "password"; //your MySQL database passworda6? t$a/x5C
$database = "users";
T c3kJI"s $timeoutseconds = 300; //it will delete all people which haven't refreshed(so probbably are"tQ gc)PYb
// offline or inactive) in $timieoutseconds time (so it actually checks the people that are active in the last
5J.w6n?0R u // $timeoutseconds seconds)
o kEg/] z //this is where PHP gets the timev}0kp n${G W
$timestamp = time();6H1Oo NM6N:\p
//counts the timeout, all people which have been seen last online in earlier than this timestamp, will get removed!U3tSb%i@
$timeout = $timestamp-$timeoutseconds;
(w_5w\U //connect to database2A8@%?hWpB
mysql_connect($server, $db_user);5x:x#[-[ d`5R9fHR gv
//add the timestamp from the user to the online list
r O${)A9n t^[:M#w $insert = mysql_db_query($database, "INSERT INTO useronline VALUES'`d~f6Z(i/N|,QQ~
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");-h7a)^&s/kr"j`s
if(!($insert)) {
`4sCM(^-{ _n G3vX print "Useronline Insert Failed > ";p*~/SE bE#{
}*uZ2D$i qq
//delete the peoples which haven't been online/active in the last $timeoutseconds seconds.
iB t?L{(? $delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");
R6mo4z5^@ if(!($delete)) {/iL:M3~?5EG5d
print "Useronline Delete Failed > ";
9C-X'y9wt1p }
AjKK*L$Xy:r1t q_ //select the amount of people online, all uniques, which are online on THIS pageH&u | d)~ SF/dA
$result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");
CJ$r;HpniY if(!($result)) {
0k(lb4|+d"r } print "Useronline Select Error > "; Xn/fj5S
}
ay)kJ"`+U(t+yw U //Count the number of rows = the number of people online!^EksFruk
$user = mysql_num_rows($result);
R)z?,\(I1g'x0V,MK-B //spit out the results
m^yGB9o6MT mysql_close();y |oiV2x_NF
if($user == 1) {t'c kC3Rs8n
print("1 user online\n");
8p2zJGR.L } else {H7A9j;s(f6@
print("$user users online\n");ps,V+{l \9c
}
W;p\JYtD"P}^ ?>
a Bhj.f~iB [url=http://www.now.cn/vhost/][img]http://b.todayisp.com/bbs/760x90h.gif[/img][/url]
5`5X3z&}NV 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(Emz z 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。
,a IO }*zI9\+sV 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。 `#Uga(a
当然啦,这两款主机也是相当不错的。${ Z VcA%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
s.Y1k7pL7W 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:[ PL*F?@3_8v 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]
5\tVGY&| 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]
u7yx;p!g@ 自己加QQ去问吧。

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