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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！
!B1Lo"`y\%mjN 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。)L |[&`T tQNq6~.sgd
首先我创建MYSQL数据库表。
|[D/F#C(V4Hq/{M CREATE TABLE tablename (;p9]/dS5g~l/Y?
field type(max_length) DEFAULT 'default_value' (NOT) NULL(q!J6`9W7u
}可以使用的SQL语句。
I_J-G$G X7Zr CREATE TABLE useronline (C7jFUHJl"H3R9U
timestamp int(15) DEFAULT '0' NOT NULL,
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`/_'A'A[%w ip varchar(40) NOT NULL,
%v7TL:m}pC@4R file varchar(100) NOT NULL,%~,Z9r3Z8xKJ d3}w
PRIMARY KEY (timestamp),
~a!gpP{ KEY ip (ip),N}.fqQ1V
KEY file (file)
#j'\ N1~9I!\9L );下面我们是PHP脚本，首先我定义MYSQL的信息。v_o y7^/[9ud
$server = "localhost"; //你的服务器%P-cD0B9w/J7U/VG
$db_user = "root"; //你的mysql的用户名;S:Fi4?~;c
$db_pass = "password"; //你的mysql的密码
!`|PW v(d $database = "users"; //表的名字设置统计的时间(多少秒内在线人数)
#PK9EG hP $timeoutseconds = 300;取当前时间。
+Y,kv|4^:? $timestamp = time();上面的完整代码：%x3`X5Z;^J8zF4o
<?php
8`"ngWpsB $server = "localhost"; //your server6e"t$o^dQ6j
$db_user = "root"; //your mysql database username
y+tO K.O+^ $db_pass = "password"; //your mysql database password if anyej%hAbQ*\~@S
$database = "users"; //the db name,|OAx$b:E
$timeoutseconds = 300;//timeoutseconds limitp#I6z9b#?g4s'MN i
//get the current time
4JJj kA@,oU $timestamp = time();
V1qK3z
Nr"e //calculate the lowest timestamp allowed
)T;]/?*Mw
DG`(L $timeout = $timestamp-$timeoutseconds;.LI-NNP p"oI
?>连接mysql%|
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mysql_connect('localhost', 'username', 'password');也允许使用变量形式。
5qgY,P}jd mysql_connect($server, $db_user, $db_pass);如果mysql数据库没有密码的话可以使用下面代码连接x*FV3vkatl
mysql_connect($server, $db_user);查询数据库的代码：
q(Y|'OvRM)R mysql_db_query('database', 'query');我们只要有访客就要增加一条记录。
;ctZC3C;O#i:V $insert = mysql_db_query($database, "INSERT INTO useronline VALUES'I:@'nRQ?
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");'u{#F C pH&SX`/v
如果用户用错误信息的话，这样处理。7?*Z$he&U'O^F
if(!($insert)) {d`)_%LV?F
Y0h a
print "Useronline Insert Failed > ";
*US.B'? v.j }然后实现当超过设置的时间就删除该用户记录。q)Web|t8ifV
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");同样给出删除记录出错的处理。
-@W&?%b&KFzd"W if(!($delete)) {
#|}WK+\-p:oc print "Useronline Delete Failed > ";u#~yu/Z
j i\
}下面我们解决数据库中不同IP的问题
J
ML*XM $result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");使用
{(O7U+g]f4wB mysql_num_rows(query);来统计用户，代码如下。Nm1]3dq"tdR1xCq0U
$user = mysql_num_rows($result);最后关闭数据库。
M*G9xCqXyN mysql_close();显示在线的人数。
[F4P+}xB/b |;k
if($user == 1) { XX|U/]W
print("1 user online\n");
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} else {
#FH7gG YF5K%{q:Pc print("$user users online\n");PusE/o!m*f}Iw
}最终把上面代码写成一个PHP文件如下。
}e:g_N5KL <?php$t)X3H%{h|,~j2q b I7oj
//Put your basic server info here g!|N8_/M\$be9S V
$server = "localhost"; //normally localhost
Y`NI8Y{;p $db_user = "root"; //your MySQL database usernameJ;h f/V!FSE
$db_pass = "password"; //your MySQL database password
1? s-J+[0| `;i*e $database = "users";
Oyz[_xDA)P-F:K $timeoutseconds = 300; //it will delete all people which haven't refreshed(so probbably arek?0VD)Z&mG
// offline or inactive) in $timieoutseconds time (so it actually checks the people that are active in the last.y!C&OG3q3_2A
// $timeoutseconds seconds)
'@-|0OP+\#b //this is where PHP gets the timec5b!Z3W9d'Kg
$timestamp = time(); o.hl*AK;Z ke
//counts the timeout, all people which have been seen last online in earlier than this timestamp, will get removed qz0w1j(AYAz
$timeout = $timestamp-$timeoutseconds;6{g{_i?
//connect to databaseD3U6}z{kL r
mysql_connect($server, $db_user);
Y/y]O!m9} c-}\$q //add the timestamp from the user to the online list/~&PnH6aG6Rf/i+j
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES*]:P!C:H,V-^~2\
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");-p#^)k%uC@ H$R8Y|G
if(!($insert)) {
QBH _3V7kK print "Useronline Insert Failed > ";-`1w+? \ o
}
Yq[Bz:qx //delete the peoples which haven't been online/active in the last $timeoutseconds seconds.
-lByH
MKVw $delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");9s|{
Vk
if(!($delete)) {
hGFO;?4w print "Useronline Delete Failed > ";
!| z%z*rHV8X ig&y }z1t EG,e8fMK
//select the amount of people online, all uniques, which are online on THIS page
uz`'?ER $result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");
D!t0e o#Ou{Z%|s+y;B if(!($result)) {
4r|N!U:E[ print "Useronline Select Error > ";
hu1}OD?S },k\.K M6aKD3G^m^o
//Count the number of rows = the number of people online[ Q)P ~$`r
$user = mysql_num_rows($result);$N$autw
{6n#o
//spit out the results!CILS6N u!y;R+g/yq
mysql_close();K_I{1A&|@s0HL
if($user == 1) {
&J9[6rn/x$f!~4a print("1 user online\n");
WXa4F1j&Xaq'Y U } else {
|Rd)`#E3x print("$user users online\n");jDTUR
}3pm8Bp-e|
?>
;Qu1rE+|| [url=http://www.now.cn/vhost/][img]http://b.todayisp.com/bbs/760x90h.gif[/img][/url]
xyHGO8?\ 以上代码我是在时代互联提供的免费试用主机上测试的，感觉效果还不错，性能很稳定，不信的话你也可以去试试。当然，记得指出我这个程序中的不足先哦。`^4ab/al
时代互联是行业内最早开始提供PHP 虚拟主机的公司之一，现在已经是的金牌域名注册商和中国互联网客户满意度十佳单位，产品功能已经非常完善 ，特别提一下几个特有用的功能：数据库自动备份、免费集成繁简通简装版、多域名绑定、多子网站支持、GCDN 网站加速器、镜像加速、高级访问统计系统、支持WAP、可选电信/网通/香港机房。
-vc"p:DC(M8k4b} 我之前建站的时候选的是他们公司标准商务E型，因为这款机型还特别支持ASP.NET3.5(3.0/2.0/1.1)/ASP。
M9C
H$Du2q 当然啦，这两款主机也是相当不错的。
I7cv'R3@3|!z&I 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
0j`:G"tv 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
P2}'~f&e0kAi 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]
1K*]:WWri8s8Z 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]
rb)?6ftum 自己加QQ去问吧。

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