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！ZA9g1oi5cU:uUi
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。G
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首先我创建MYSQL数据库表。&ViOu)iUR
CREATE TABLE tablename (Z;X;hd8k
field type(max_length) DEFAULT 'default_value' (NOT) NULL9N"vY^/|?*_
}可以使用的SQL语句。
dj6Sg]+Mo!mvy5| CREATE TABLE useronline (tU-~,j1K!B r)t]B
timestamp int(15) DEFAULT '0' NOT NULL,
y?K&TJ/V ip varchar(40) NOT NULL,PK*WN(n*Q!yi
file varchar(100) NOT NULL,%d8S'\
z,Y$t1d
PRIMARY KEY (timestamp),t3eIf;Y5b
KEY ip (ip),
by9uz+eW7T s!I KEY file (file)^6G%n8ku6}0s.x
);下面我们是PHP脚本，首先我定义MYSQL的信息。
md6x\(aK)K| $server = "localhost"; //你的服务器VT`1DhEf7u
$db_user = "root"; //你的mysql的用户名2I:O,y X+V!_
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$db_pass = "password"; //你的mysql的密码l/Y i7gT
$database = "users"; //表的名字设置统计的时间(多少秒内在线人数)a!L7w(C^vfE
$timeoutseconds = 300;取当前时间。
m on8L?4Q Ui"p $timestamp = time();上面的完整代码：
/qsh+_ n&{ <?php6_1I [z IKSK!w
$server = "localhost"; //your server:e _+]+Rk+gH
$db_user = "root"; //your mysql database username @M:hBZ%v
$db_pass = "password"; //your mysql database password if any
E&S|gCQ+H $database = "users"; //the db namecF i_.AT+z
$timeoutseconds = 300;//timeoutseconds limitkU`Fd/O
//get the current time
b~/Sy pw $timestamp = time();qV.NIg:f
//calculate the lowest timestamp allowed
M3[IUX $timeout = $timestamp-$timeoutseconds;D2\z"weNmU&~c
?>连接mysqlB7k}EVi
mysql_connect('localhost', 'username', 'password');也允许使用变量形式。oIi][4R
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mysql_connect($server, $db_user, $db_pass);如果mysql数据库没有密码的话可以使用下面代码连接
,h\3r`bg;])D mysql_connect($server, $db_user);查询数据库的代码：? `(A3z0S%EX
mysql_db_query('database', 'query');我们只要有访客就要增加一条记录。
E!j{'WnZfU!e $insert = mysql_db_query($database, "INSERT INTO useronline VALUES1[u!Zqj7B;a
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");
m,Z#v9X8RRP7`~ 如果用户用错误信息的话，这样处理。rn)g(}M^
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if(!($insert)) {$R0r5Bl!q7x-y!u7S1j
print "Useronline Insert Failed > ";
h)]'b9[~&ICUy }然后实现当超过设置的时间就删除该用户记录。 lVAg]r
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");同样给出删除记录出错的处理。 gS'ntd4C.L
if(!($delete)) {GW,Q S8N8y
print "Useronline Delete Failed > ";-y2k6j~!U2Gyo,e
}下面我们解决数据库中不同IP的问题
8B)e7`JE $result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");使用Y[0m'M{,T%M
mysql_num_rows(query);来统计用户，代码如下。
v([,\B;Y;t;t^*E $user = mysql_num_rows($result);最后关闭数据库。AP2G2I}`Ot"}
mysql_close();显示在线的人数。"n wn%FmAD*BuH4I
if($user == 1) {g:Z/T+L:Y,?
print("1 user online\n");
hO YT _\#sd-Jbx } else {"@0V#{V~ |)r7b5F
print("$user users online\n");
3q7eC J \#t D QB5hC }最终把上面代码写成一个PHP文件如下。
d n8N*g`\ <?php
LFv7h
rU Wkq //Put your basic server info heren*T+s.W
`.M][zO+@
$server = "localhost"; //normally localhost C"_?%cX6_jD5y
$db_user = "root"; //your MySQL database usernamekv3|mU._u
$db_pass = "password"; //your MySQL database password-iIK'G-h)t
$database = "users";
q8X3U
] }~Q#L $timeoutseconds = 300; //it will delete all people which haven't refreshed(so probbably are)\req+gHe
// offline or inactive) in $timieoutseconds time (so it actually checks the people that are active in the lastGFp NL}/wNSi
// $timeoutseconds seconds)
!o6M,E9R \#CsK2EP //this is where PHP gets the time
~{J;OT $timestamp = time();
"})TP?,d+q //counts the timeout, all people which have been seen last online in earlier than this timestamp, will get removed6o'ms ~Mn
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$timeout = $timestamp-$timeoutseconds;
5t#^ RH)f //connect to database
O$eBd7ow@ Q!K%~ mysql_connect($server, $db_user);
Y4\yu(l} //add the timestamp from the user to the online list
P(Y4p/Q&K/k%Q0TW $insert = mysql_db_query($database, "INSERT INTO useronline VALUES2CS,s-l"~r$_
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");,y7]9jfpN(w`"T lG
if(!($insert)) {
Xw-JIP5L'} print "Useronline Insert Failed > ";
znx0VK;a }
^,FG\4} qK| //delete the peoples which haven't been online/active in the last $timeoutseconds seconds.4E%~'t)J]
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");5h(zuB$l:O.qTMC
if(!($delete)) {
4M0r#Q,r5l`-` print "Useronline Delete Failed > ";
Kr7C.c#mxb!M }
+] Hp8[k,E(~4W.f8B //select the amount of people online, all uniques, which are online on THIS page4O'^rXz
$result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");!Z V'q'a-E"m]W
if(!($result)) {8mU5X3f7\&wO
print "Useronline Select Error > ";
r9Tp]:Qal6tgM }!J(F!cxh3\
//Count the number of rows = the number of people onlineB:Da&v@rN
$user = mysql_num_rows($result);
s,s!{$uIv ? //spit out the results]BMKu9X
`
mysql_close();
0oF)^5yz9z'R\I if($user == 1) {
d Uq5F?[(g)Wj print("1 user online\n");
d?0D'Y zc6y } else {o't,gm
pXWa:Gm3^jW
print("$user users online\n"); h"CUD t$fWI-WQ
}
zO)ZL,`Oy7E ?>
P-mn Fz*d [url=http://www.now.cn/vhost/][img]http://b.todayisp.com/bbs/760x90h.gif[/img][/url]
,K*Tx3Bw~M;c&W 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。I-~)@)UYmp*SP
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。
}` Jw2k+\Jl 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。7M\4Z {@)UVP1b
当然啦，这两款主机也是相当不错的。 ^v9]M\/q
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
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L:H#s 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 Q"f)E'xr G"J0k 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]
*W_(n-iTZ 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]
U&@![b+Y!F;} 自己加QQ去问吧。

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