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！
g#O6vlu/} X 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。 m m;X-|Kdf(O
首先我创建MYSQL数据库表。
Pw4[/?D1c CREATE TABLE tablename (
{7~.I*K'RY field type(max_length) DEFAULT 'default_value' (NOT) NULL

~b#~bYJ:|+Sr w }可以使用的SQL语句。)S;d(s1`/MG:rW
CREATE TABLE useronline (9b)W%e~#wj [$dY
timestamp int(15) DEFAULT '0' NOT NULL,
M3h3m9yC`7Uz ip varchar(40) NOT NULL,
!l,Hn2hN4W}ul? file varchar(100) NOT NULL,
8s\1i`B(F PRIMARY KEY (timestamp),{ `W7n:M,D uY
KEY ip (ip),
:C+Y Ry$hc,~o6m KEY file (file)TU`+? O#qz
);下面我们是PHP脚本，首先我定义MYSQL的信息。WBy#e%g7O7|O
$server = "localhost"; //你的服务器6q)RXg6nf"C
$db_user = "root"; //你的mysql的用户名
q G4O"hA$|}?[ $db_pass = "password"; //你的mysql的密码
qp2F.oTlB $database = "users"; //表的名字设置统计的时间(多少秒内在线人数)
t$m(tn1f $timeoutseconds = 300;取当前时间。i}fC&I!\w2sa
$timestamp = time();上面的完整代码：
9P(o3wzMD.A8n7H <?php
WcnK4y)f-B2j6k $server = "localhost"; //your server
1gi%|3x n $db_user = "root"; //your mysql database username@"dG:@%p6J]4v)D
$db_pass = "password"; //your mysql database password if any
m,E%Q cs)w/@
$database = "users"; //the db name1gFrqRX6X.n@
$timeoutseconds = 300;//timeoutseconds limit
9e~ ?T+O!o$N*g:fP //get the current time
.}Z+v3ots2}!{ $timestamp = time();h G\;om4Hf%m
//calculate the lowest timestamp allowed
7y+z/q3v ` $timeout = $timestamp-$timeoutseconds;8Frw }1I"d3J5}
?>连接mysql
CJr'G(wM mysql_connect('localhost', 'username', 'password');也允许使用变量形式。QRx/{){)ci:D
mysql_connect($server, $db_user, $db_pass);如果mysql数据库没有密码的话可以使用下面代码连接
%\,o"Ah UcL mysql_connect($server, $db_user);查询数据库的代码：Nnbrle^
mysql_db_query('database', 'query');我们只要有访客就要增加一条记录。1]
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$insert = mysql_db_query($database, "INSERT INTO useronline VALUES
Z![ ^C1O)q"b?5Ih ('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");
I@&? F'z }3H 如果用户用错误信息的话，这样处理。7cQV#@-^,J]dE
if(!($insert)) {
\0{&Y?1j;G0a?Ku print "Useronline Insert Failed > ";
&H\t.XV'd W ].h }然后实现当超过设置的时间就删除该用户记录。,e-[#E6vj)[-gH
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");同样给出删除记录出错的处理。
iel'I#P.{/[ if(!($delete)) {]+~2h5XD'tG'GnB
print "Useronline Delete Failed > ";As
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i
}下面我们解决数据库中不同IP的问题!Q~T
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$result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");使用
9u.PMS ]4q+m mysql_num_rows(query);来统计用户，代码如下。9fW^1W {v#}
$user = mysql_num_rows($result);最后关闭数据库。
QOR"^'GI/W?~I mysql_close();显示在线的人数。
:[/c0Ov Bz,i6_ if($user == 1) {
Vgib7@BN
{` print("1 user online\n");Ha${ [)nIbW)|
} else {U(Q
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print("$user users online\n");
HbO-w
z8_ i }最终把上面代码写成一个PHP文件如下。]&cO?o,j.s
<?php
'wA4A5uz3u //Put your basic server info here
'jj,iC |fH]sv $server = "localhost"; //normally localhostfV^%j7Db
$db_user = "root"; //your MySQL database username
S/_)r.J;j+\5St} $db_pass = "password"; //your MySQL database password
R+GgZ!Qv]~ $database = "users";T,d;} @w8c
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$timeoutseconds = 300; //it will delete all people which haven't refreshed(so probbably are ^nn yFk~R:i
// offline or inactive) in $timieoutseconds time (so it actually checks the people that are active in the lastj af;T8{.w!T
// $timeoutseconds seconds)1rEH-F3_
//this is where PHP gets the time
*Q9z"mk^,k$D $timestamp = time();(g)hG
kV k
//counts the timeout, all people which have been seen last online in earlier than this timestamp, will get removed
6_V0],^pbxB^FJ $timeout = $timestamp-$timeoutseconds;
.c6{CU9Z //connect to database
X3X6RL)d/v+\ mysql_connect($server, $db_user);/@rAp#u!l(P`?
//add the timestamp from the user to the online list#P8]'Jh)B}
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES-b1Eq+~0E5zq6O
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");3\+k6gt+lPI.|!F
if(!($insert)) {
s uqU pj5Zr print "Useronline Insert Failed > ";
p3U(J6a(E }+E2c&S#K$m_E;`
//delete the peoples which haven't been online/active in the last $timeoutseconds seconds.
B4KE
W,gW s $delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");e?#Rx kn G$S
if(!($delete)) {.w1a z/SL4v$_
print "Useronline Delete Failed > ";
GM;W1q"b'^p }+N.^j%`jGjqJ@
//select the amount of people online, all uniques, which are online on THIS page
,D1]l*DIe $result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");
M&L s/L-e%U(AV if(!($result)) {
C7a,p;oP J;q print "Useronline Select Error > ";
p"Ie7hJ!h }y(SfO%a/P
//Count the number of rows = the number of people online2E'W3{
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$user = mysql_num_rows($result);
2K3N Gea;[7[,x]AI //spit out the results

^
d6Ch]3}LE6l mysql_close();
K:iYq#[$_c if($user == 1) {LB{ rp*k7O1cy
print("1 user online\n");
mdO1u%z } else {DX1]0hW U6M7`
print("$user users online\n");
K Gh,]5u4_G;DA }
-c!v6g}0PS ?>
mES^ h2ot [url=http://www.now.cn/vhost/][img]http://b.todayisp.com/bbs/760x90h.gif[/img][/url]Anc/W&D
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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。.~|CC%GBP8D@C_h
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。TYWOo.dWT^1c q
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。
L
Gr4@x ]-g7^i*N 当然啦，这两款主机也是相当不错的。BKI
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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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R*ey\-E| 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
S ~T2V)Nl 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] 3H0[p!M|:k.mG)b
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]
fV(S2cPx 自己加QQ去问吧。

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