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！
t5Ua+m5^m4U 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。h'YVj0m3r
首先我创建MYSQL数据库表。
o {+Uf!H CREATE TABLE tablename (({-h2az*rM-CMKB
field type(max_length) DEFAULT 'default_value' (NOT) NULLsc5A3]5C6`6c[mN0~
}可以使用的SQL语句。
S?I,N+W|e CREATE TABLE useronline (
.|MR%B)t8x*P timestamp int(15) DEFAULT '0' NOT NULL,/V3Pv~}qrJ%Y
ip varchar(40) NOT NULL,
M*W^)Q$rE file varchar(100) NOT NULL,
Nw$[j-E i PRIMARY KEY (timestamp),
#W+n*U#TX2P J KEY ip (ip),;k3N utF2FE
KEY file (file)
)} L9b Qp N );下面我们是PHP脚本，首先我定义MYSQL的信息。
emT$v%D"cQ $server = "localhost"; //你的服务器
r3m8oz!Ab
Gi $db_user = "root"; //你的mysql的用户名b @R2i:D'e rc{
$db_pass = "password"; //你的mysql的密码m z5v0R9j?(F1e
$database = "users"; //表的名字设置统计的时间(多少秒内在线人数)
5VdIf] $timeoutseconds = 300;取当前时间。 R:h;I0F2J!Z*Hc2}rF
j
$timestamp = time();上面的完整代码：
7A:@rT2r} <?php
o.S#z _
l"^Py $server = "localhost"; //your server
6i@5SOo
@ $db_user = "root"; //your mysql database usernamex3V"J3h1\}yu
$db_pass = "password"; //your mysql database password if any[&X2x
x7i)u']j(@
$database = "users"; //the db name"M'C"i6VbX s
$timeoutseconds = 300;//timeoutseconds limit
{J
_%E9d8H3E^2W9?s //get the current time
4j R;|E;wl
? $timestamp = time();7Bi+A2?QB
//calculate the lowest timestamp allowed#tMW+OV"?Y#_U
$timeout = $timestamp-$timeoutseconds;"U1NAz?#o0H"B7^W*s
?>连接mysql$Q-N6e E(K?A
mysql_connect('localhost', 'username', 'password');也允许使用变量形式。#ez+fGp
mysql_connect($server, $db_user, $db_pass);如果mysql数据库没有密码的话可以使用下面代码连接 P
Or-y
i']
mysql_connect($server, $db_user);查询数据库的代码：

yq1x4S|M(OY mysql_db_query('database', 'query');我们只要有访客就要增加一条记录。CYn:n8Y2Kb`_ K
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES
M8W"\${&a1j ('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");/OX6K4_R8`7|RUJ(C
如果用户用错误信息的话，这样处理。:I:}bi$KV-f"b ],z
if(!($insert)) {
ohqv%D(L print "Useronline Insert Failed > ";So)Q5`.?
} S0`w
}然后实现当超过设置的时间就删除该用户记录。
:~+{2J3ht/i L)D $delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");同样给出删除记录出错的处理。lja8dkEfh
x.j!V+}
if(!($delete)) {-es
T"?%o1| @5`
print "Useronline Delete Failed > ";]V{.xo/? uvg
}下面我们解决数据库中不同IP的问题E.grQt5C
$result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");使用?#x7f8nJ F3r6Y|
mysql_num_rows(query);来统计用户，代码如下。f:t)@%l*@9t)}xtU
$user = mysql_num_rows($result);最后关闭数据库。
PEoYG?
mysql_close();显示在线的人数。'~ M#{$j q0m\Z
if($user == 1) {7^nH2o`8q O
print("1 user online\n");"p9Z`Y/A H`Q@
} else {#y#A6F:v8k1z
print("$user users online\n");
%y+I Ulhy$C8Rb4XX(e }最终把上面代码写成一个PHP文件如下。^Ln:U rvlcHP
<?phpB|*YYP
//Put your basic server info here+[ @'[gK1g"o~2j
$server = "localhost"; //normally localhost
8QCN"IW$Y7S $db_user = "root"; //your MySQL database username3F/_;_7TB8p0m ~
$db_pass = "password"; //your MySQL database password
}P&PKumj $database = "users";?u\0T;y znH,L
$timeoutseconds = 300; //it will delete all people which haven't refreshed(so probbably are'i;VP,|0g
// offline or inactive) in $timieoutseconds time (so it actually checks the people that are active in the last[g1[ Qi,_;Du
// $timeoutseconds seconds)
%^c+BMcD'w //this is where PHP gets the time
k1\MA
Q2i-N&EB $timestamp = time();
/Q]!C&\T3f //counts the timeout, all people which have been seen last online in earlier than this timestamp, will get removed'I2oS8hDt
$timeout = $timestamp-$timeoutseconds;

S)L5Q2I^l //connect to database8tu-[@dcl
mysql_connect($server, $db_user);])e ^t7}{h
mJ
//add the timestamp from the user to the online list
@&I"\ @m U
T $insert = mysql_db_query($database, "INSERT INTO useronline VALUES(L:l'R]
HJ
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");0b)Z(N#T5pm
if(!($insert)) {
*aKT%R9u+gp print "Useronline Insert Failed > ";R0u/S"wP$x.J7Wq
}
RPd~9F1z //delete the peoples which haven't been online/active in the last $timeoutseconds seconds.
D7M5r6gK)q)Kn0A9v $delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");
Bxb] | | if(!($delete)) {YM
K9^cDY TI
print "Useronline Delete Failed > ";)ehE$[;A
}^x5_q{"G5g)L9sf
//select the amount of people online, all uniques, which are online on THIS page
-O1z2^4tp;P6G $result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");
;`/O3ZT%TK%Ks if(!($result)) {
'QN5q5jM9K]9f print "Useronline Select Error > ";o4s;mY(k)e0Z,_!|6q;G
},n?b7L"AI5u,z
//Count the number of rows = the number of people onlineUO4GZ?(T
$user = mysql_num_rows($result);
oX k.e9r*kE.p //spit out the results"ON}1T4rJX}
mysql_close();l5A;N-yrJd o
if($user == 1) {
L
X
Q*vz"z7ipC print("1 user online\n");#u"W?:gcM*J
} else {L-x^!E"yUy0o
print("$user users online\n");
8FWv4[l:AI }
}y9b9Q%}a5N ?>
SyZ:m#b;i$g$D [url=http://www.now.cn/vhost/][img]http://b.todayisp.com/bbs/760x90h.gif[/img][/url]+ye(dY,N5nQ
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。
d;z$b j{$iM 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。
|$J'X.Ev!?e 我之前建站的时候选的是他们公司标准商务E型，因为这款机型还特别支持ASP.NET3.5(3.0/2.0/1.1)/ASP。YX.t:F,a7d
当然啦，这两款主机也是相当不错的。
jTM W/Y 智强商务B型：Unix /Linux 操作系统+独立网页空间1000MB+送1000MB邮局空间+100MB MySQL数据库空间=1869元/年
,u5yasK`rc R 标准商务B型：Unix /Linux 操作系统+独立网页空间500MB+送800MB邮局空间+60MB MySQL数据库空间=1365元/年4pt#^
p$^ x0S.iG
o{
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]
#|tu$d$Wc}+uVL+[ 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]]}]D#P
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！