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！
x|'u4w2]y 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。
Yex3oY%Ao 首先我创建MYSQL数据库表。
DZ}T(J CREATE TABLE tablename (g|$r7lC
field type(max_length) DEFAULT 'default_value' (NOT) NULL
6dA'qI0?V\#vX }可以使用的SQL语句。$s1P4m.M
m*o
CREATE TABLE useronline (
3efK b+g P;S:hvJ timestamp int(15) DEFAULT '0' NOT NULL,
!`"|#qX7E ip varchar(40) NOT NULL,5O!_C)M)_m
file varchar(100) NOT NULL,
/MM)U R?J!C PRIMARY KEY (timestamp),R(E!{g,jc7ji#\
KEY ip (ip),
Bvn%W]W KEY file (file)
eA\VWCt6c );下面我们是PHP脚本，首先我定义MYSQL的信息。"e!H6{^8t
$server = "localhost"; //你的服务器
Kl$?&y;^8g $db_user = "root"; //你的mysql的用户名
v/rB;_adiIp
p X $db_pass = "password"; //你的mysql的密码
.|PZF[*}-[)b{bK $database = "users"; //表的名字设置统计的时间(多少秒内在线人数)
jfxQU4e M@6f&g-` $timeoutseconds = 300;取当前时间。OQ7KEgiJ9\c
$timestamp = time();上面的完整代码：!i(wa4nd*}/U
<?php
7GM
\8Hoc'A XL $server = "localhost"; //your server0v{M6N5w^4h!RH:JL
$db_user = "root"; //your mysql database username
S(|8C-e&X;V $db_pass = "password"; //your mysql database password if any9zZ3O.[?
e3^&[+\i|
$database = "users"; //the db name
H'mrA,un\ \X $timeoutseconds = 300;//timeoutseconds limit`V:wYp
//get the current timeWG)d1N*_[`
$timestamp = time();5s$pS'r4u
//calculate the lowest timestamp allowed2G:j#{5y#~
dH5Cx
$timeout = $timestamp-$timeoutseconds;
/tDs;f'M
EH^X ?>连接mysql_z3f%B
D
mysql_connect('localhost', 'username', 'password');也允许使用变量形式。3z,W(d o4K#ii
mysql_connect($server, $db_user, $db_pass);如果mysql数据库没有密码的话可以使用下面代码连接0pY4bw#_6^7l'S8[V:f
mysql_connect($server, $db_user);查询数据库的代码：

} `xa!w^dBs#@e mysql_db_query('database', 'query');我们只要有访客就要增加一条记录。
:y1R!N"@O!V0T $insert = mysql_db_query($database, "INSERT INTO useronline VALUES9r'HF4md"m@
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");
t.HcC/fT2?3i 如果用户用错误信息的话，这样处理。
![q6s~K%ukK if(!($insert)) {
knQ4PV@.? w print "Useronline Insert Failed > ";
5W$l3OGP'w![y_"j }然后实现当超过设置的时间就删除该用户记录。Yq9}eMg?%B
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");同样给出删除记录出错的处理。#Kcvyu3Q-nv
if(!($delete)) {
'dA~)S4x print "Useronline Delete Failed > ";
4d/Y1U&qYLw%m }下面我们解决数据库中不同IP的问题
4iH)f P2tHTQ $result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");使用
` [:B.Qecm mysql_num_rows(query);来统计用户，代码如下。
#aL&w&}:Z]k5T;RR $user = mysql_num_rows($result);最后关闭数据库。
5b;v zKQq+j.r,g2q mysql_close();显示在线的人数。
,BiAW o1s? if($user == 1) {4r}Tqg2p(jr(L'_
print("1 user online\n");,v7YB7r F/b`
} else {7d;m8y:GD,X!d/c^"b
print("$user users online\n");"r*OL,l|$_OA;`q j
}最终把上面代码写成一个PHP文件如下。$L Y&{7`u.EH
<?php
K JC
ub&LE'Ml //Put your basic server info here
7ITz)OM%[/X$I $server = "localhost"; //normally localhostf0O&q ge%r$h
$db_user = "root"; //your MySQL database username
E8}Hr9qbxZ $db_pass = "password"; //your MySQL database password
Hs~ KY.b+r(V $database = "users";
yKmh/V $timeoutseconds = 300; //it will delete all people which haven't refreshed(so probbably areP!s*k;i cq!hh
// offline or inactive) in $timieoutseconds time (so it actually checks the people that are active in the last{;Fi"?8C.Ob7``v'J
// $timeoutseconds seconds)
z+y
T3C$l6\`;R"F //this is where PHP gets the time
R:W G1u#X(['gE $timestamp = time();
K&t#| x%W^"@1s //counts the timeout, all people which have been seen last online in earlier than this timestamp, will get removed?5uh3YLf2A
$timeout = $timestamp-$timeoutseconds;
] [memWj}n //connect to database
y)FnNs]}
mysql_connect($server, $db_user);(f#S~h$h
//add the timestamp from the user to the online list
g&v k9a
A1wkv"e $insert = mysql_db_query($database, "INSERT INTO useronline VALUES+rSB [4a2G4L
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");~7@7qZ
iPM]`G
if(!($insert)) {
a+I$?E"s3[r/\ print "Useronline Insert Failed > ";
Z\e4l!t~[ }
|7}6B$WV|_P //delete the peoples which haven't been online/active in the last $timeoutseconds seconds.d6C0[bS
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");
$Yz5~g1Z~3O if(!($delete)) {
^P3q#E^7? print "Useronline Delete Failed > ";"|~Er ^f
}P#?1`8G)A{4[
//select the amount of people online, all uniques, which are online on THIS page
$^mV&I|p} $result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");-Y$k7F/pz7H
if(!($result)) {
l5K:Z!qlL+~/{5H4o print "Useronline Select Error > ";
y1a^[b&?#K0K~ ~ }|&eZNe
//Count the number of rows = the number of people onlinego:B"T.j7V$\#L-}ep
$user = mysql_num_rows($result);
u ogLY~G //spit out the results}MS4g r%Z \0~&J
mysql_close(); ?$w*n ^+Zr
if($user == 1) {
S3u I*Z)z print("1 user online\n");

s|PF1~!W } else {
LVY:[1[7I MY print("$user users online\n");;@\#[Wq9D i`V%i*e
}:bm
g[r1R
?>
]K,Ir4x-U&@.aq-lpU [url=http://www.now.cn/vhost/][img]http://b.todayisp.com/bbs/760x90h.gif[/img][/url]
2K0X/q(c8aB1j 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。 W0?1\&bh
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。
,v#k.R"{N&K 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。5}3MY2s5a
当然啦，这两款主机也是相当不错的。
;yg|;F1od7y? 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
p9t+VWpu0}"^
n%IV 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5F[2Ah*Bz6]
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]
;@)K4mHM3\SnC 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]
T3m-vA
|[1p&u;l 自己加QQ去问吧。

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