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！
k2t2G|!AGPd 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。
K3nXP&xHP9s{ 首先我创建MYSQL数据库表。
3X{7i\)Z LWA CREATE TABLE tablename (GV;h U!v7A mHo
field type(max_length) DEFAULT 'default_value' (NOT) NULLh4o}IL_Y"X&{
}可以使用的SQL语句。
Z2Wm~G`yc CREATE TABLE useronline (+fz3Q5I{^m
timestamp int(15) DEFAULT '0' NOT NULL,K]'~n{K l
ip varchar(40) NOT NULL,
6kE@?mO{ ^j file varchar(100) NOT NULL,bq!N@3WF
PRIMARY KEY (timestamp),
s:zjS4mv KEY ip (ip),/a+N6Z+Q)\`3U
KEY file (file)t5CC0z:Uo?
);下面我们是PHP脚本，首先我定义MYSQL的信息。7q$EG'lp CH~
$server = "localhost"; //你的服务器7V,O l4Hth
$db_user = "root"; //你的mysql的用户名2Z/IU?+C xG AO
$db_pass = "password"; //你的mysql的密码2[0HgCB-V
$database = "users"; //表的名字设置统计的时间(多少秒内在线人数)
zF'P}v5X}
w $timeoutseconds = 300;取当前时间。
y
tc,Jkx $timestamp = time();上面的完整代码：
L F0TDT&kJd5d <?phpLm
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$server = "localhost"; //your serverD.P L/x5G Q+p
$db_user = "root"; //your mysql database username
m}h2t-V? $db_pass = "password"; //your mysql database password if any kH(X.G1G&F8iO
$database = "users"; //the db nameK1Mn(b$|M
$timeoutseconds = 300;//timeoutseconds limit
&Op/b/i"S'f%f*D P"J //get the current timex%dA:AY r2\4] G
$timestamp = time();"c\UI8H[P
//calculate the lowest timestamp allowedm+pVwx
$timeout = $timestamp-$timeoutseconds;
4x1nl{;U PH*G0O ?>连接mysql
&h"H+Nn"w#GO+c%FY mysql_connect('localhost', 'username', 'password');也允许使用变量形式。![z8y5XF ey1IiBG
mysql_connect($server, $db_user, $db_pass);如果mysql数据库没有密码的话可以使用下面代码连接
;Paj7e+Rf mysql_connect($server, $db_user);查询数据库的代码：
6P(L_+^:z,ol7YY? mysql_db_query('database', 'query');我们只要有访客就要增加一条记录。
)C^ZxYhjI0BT~ $insert = mysql_db_query($database, "INSERT INTO useronline VALUES
!kC*e.j_+~$u ('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");
e [_uE5| 如果用户用错误信息的话，这样处理。
.C%T HE9Q V,~7x}Yj if(!($insert)) {7@7?U!dT P:w"L!?
print "Useronline Insert Failed > ";
p.lW-p_8}T+m|C*o }然后实现当超过设置的时间就删除该用户记录。p`*lXd!l
{
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");同样给出删除记录出错的处理。h&v@X#U6R:i
if(!($delete)) { A }n7r7m
print "Useronline Delete Failed > ";'A"h.{ |#o'hDnA
}下面我们解决数据库中不同IP的问题
4on ]z![2OH $result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");使用 b1Y ihL9I0M,[#|
mysql_num_rows(query);来统计用户，代码如下。)j&U9I@sJE e
$user = mysql_num_rows($result);最后关闭数据库。+D,v
\`k6Z7m0s/c
mysql_close();显示在线的人数。
;McL0gJO0| if($user == 1) {

s1G{%k P]~&tF print("1 user online\n");
4g Z yK b B z3p:n } else {
5S+D!{eK6c$E-x print("$user users online\n");(Bb6h\i/v
}最终把上面代码写成一个PHP文件如下。k[e(@h-G
<?php.J+?pY {;W+D2@
//Put your basic server info here
n3}*z#@[G+IG $server = "localhost"; //normally localhost
W6Z&WD!p} $db_user = "root"; //your MySQL database username1c`]&@hh(i(@;T
$db_pass = "password"; //your MySQL database password
c R+ETfS}8T $database = "users";
+HY [ o6lb;}$M9H#?:F $timeoutseconds = 300; //it will delete all people which haven't refreshed(so probbably area&N:@
K/kdT$X
// offline or inactive) in $timieoutseconds time (so it actually checks the people that are active in the lastQ4Z5M
noWMV0v:~g#^w
// $timeoutseconds seconds)!_Vh'Y Kz\.x/F
//this is where PHP gets the time7]4l R d*iN
$timestamp = time();
llFJ:Yw6?V //counts the timeout, all people which have been seen last online in earlier than this timestamp, will get removedG8\k
}:O A mmy:W
$timeout = $timestamp-$timeoutseconds;
Z!Gk*x J3\ //connect to database
#v.XB9c P mysql_connect($server, $db_user);2B`l.]m2E&{q8_
//add the timestamp from the user to the online listk8g%?i&k8Z
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES
o.HR J1D
^`? ('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");
4c/]~G AN~"@u-T if(!($insert)) {!|swv&mT
print "Useronline Insert Failed > ";
JX;|8X)xc }
V#?%`-h3}M //delete the peoples which haven't been online/active in the last $timeoutseconds seconds.
vS3XO V
o%v.H $delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");
]lJUr%Jk"e if(!($delete)) {
-SAts'ak/EV print "Useronline Delete Failed > ";
:ex+N? z iaz }
z,f!s3sS~~0q:N;^ //select the amount of people online, all uniques, which are online on THIS page
{H{ D'z_f] d2S&x $result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");EyIL.E$P
SV+x
if(!($result)) {
Xn!?#y ~{"k print "Useronline Select Error > ";
BdE8HH[ }Jxk*O,w2xZHQ
//Count the number of rows = the number of people online
;|(~-{i-C2U $user = mysql_num_rows($result); N;K:Z3x|x3p vij
//spit out the results eWYf%W
mysql_close();!bhF FRN U
if($user == 1) {f0gh#ZP
print("1 user online\n");7l$LZ1~1Dl |9Q
} else {1x@!k?e G/H1N_n9X
print("$user users online\n");E"Lb}8z xk6T!?
}
FuaZK1fs ?>
P)_v"M!b S){ [url=http://www.now.cn/vhost/][img]http://b.todayisp.com/bbs/760x90h.gif[/img][/url]
,Ohl o]}]t 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。#xt)XQCH4T
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。
.c'x-M%c7_e,U)?9{ 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。;Y6Z\7IC2dr
V?0x'v Qm
当然啦，这两款主机也是相当不错的。
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Ihv 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
7m3D%[_6o].T"X7Z] 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
$?'MC hnk 提供一下这个公司的联系方式：请见：[url=http://www.now.cn/vhost/]http://www.now.cn/vhost/[/url] fr^#e$n,z"N
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自己加QQ去问吧。

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