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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!
6x3z{"io(_K 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。
Oq)t ?+] 首先我创建MYSQL数据库表。;whD&R-D$x6nF
CREATE TABLE tablename (
'_9n&h3rI\ field type(max_length) DEFAULT 'default_value' (NOT) NULL H` hUL*KA&fm
}可以使用的SQL语句。
g8HI-@5Q P CREATE TABLE useronline (
s8z+yX^!A Y timestamp int(15) DEFAULT '0' NOT NULL,
?5YI$e{f ip varchar(40) NOT NULL,j {i @;u5qF
file varchar(100) NOT NULL,
~0t%A3Qj PRIMARY KEY (timestamp),\k6H*~(@)a'd
KEY ip (ip), sg{ \%n9_6qn+B
KEY file (file)&f;Z]:Mv+Q ~!s(jU
);下面我们是PHP脚本,首先我定义MYSQL的信息。
ox5Pvs })B2I $server = "localhost"; //你的服务器"c1yrP {7R ].a
$db_user = "root"; //你的mysql的用户名;h|&G*xqdH"t
$db_pass = "password"; //你的mysql的密码
}s6s#iZBk^6{ $database = "users"; //表的名字设置统计的时间(多少秒内在线人数)
eZ(X-hKz0|n E0nhx $timeoutseconds = 300;取当前时间。
*z$@f&e;z.U $timestamp = time();上面的完整代码:
;Jk HN{?m9R <?php
2h~gj~BM0e%J(M $server = "localhost"; //your server
"P5a9Q&@]t}X $db_user = "root"; //your mysql database username Ih,L\[1b Vfu
$db_pass = "password"; //your mysql database password if anyH@D,[S ur5V"C~ C
$database = "users"; //the db name~8bF.}$s%@ q#D+r
$timeoutseconds = 300;//timeoutseconds limitxAk-}+zT8Q
//get the current time
?o)a@Z1c $timestamp = time();
BQqb,M //calculate the lowest timestamp allowed
7b l8\_7X%U` $timeout = $timestamp-$timeoutseconds;
@-p9\&j5s%T is5|_ ?>连接mysql Wvm3M/_:h
mysql_connect('localhost', 'username', 'password');也允许使用变量形式。
4\8}Uq6C4_H S mysql_connect($server, $db_user, $db_pass);如果mysql数据库没有密码的话可以使用下面代码连接
nc7t^pU(iR mysql_connect($server, $db_user);查询数据库的代码:)juIRv
mysql_db_query('database', 'query');我们只要有访客就要增加一条记录。
*KuF B2CDo $insert = mysql_db_query($database, "INSERT INTO useronline VALUES
y7o,TYb ('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')"); @"e L0g y `d%t Uu
如果用户用错误信息的话,这样处理。wWP{3Gw
if(!($insert)) {#e p1H`!bfa'q
print "Useronline Insert Failed > ";6Sn?k{ At&C ^~
}然后实现当超过设置的时间就删除该用户记录。
.U-](lpx+po1X $delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");同样给出删除记录出错的处理。 m5s,c2pR
if(!($delete)) {!G6w&\$G5_c3}h*g
print "Useronline Delete Failed > ";
#Q[D1C@+o(i_.H }下面我们解决数据库中不同IP的问题]#ox0o3{ c
$result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");使用
H&] H Iy mysql_num_rows(query);来统计用户,代码如下。(M"]9j_$Ca'OMG
$user = mysql_num_rows($result);最后关闭数据库。
y&^Cn?4m mysql_close();显示在线的人数。
Z7Z[U+j'xN Fk if($user == 1) {
&@Rw;a? A print("1 user online\n");/~6l6P9S$RB8T
} else {
)k2{Rey| print("$user users online\n");.[:NWHZ+n"V
}最终把上面代码写成一个PHP文件如下。an.Mg&T \,jJ
<?php#j]'rW3De$}
//Put your basic server info herevk\8}2N n3B(FY
$server = "localhost"; //normally localhost
Yz%^!H9o].GDV6N $db_user = "root"; //your MySQL database username8zT!Z8Pn2F!g
$db_pass = "password"; //your MySQL database passwordn2j7\f Gkg8e
$database = "users";Z"hA)b'K CIa+g
$timeoutseconds = 300; //it will delete all people which haven't refreshed(so probbably are
9cb7W8wU#tOX dj // offline or inactive) in $timieoutseconds time (so it actually checks the people that are active in the last/m1V L Z/q~$o
// $timeoutseconds seconds)QAMY?%?6cK
//this is where PHP gets the time
dz [JU;bf"Hpx $timestamp = time();s\vd7Y(L
//counts the timeout, all people which have been seen last online in earlier than this timestamp, will get removed/~ NwgU#i%q
$timeout = $timestamp-$timeoutseconds;~ ?a'Gr:CbxW9{
//connect to database"hwfL:dUau
mysql_connect($server, $db_user);
WHks5X xe.\ //add the timestamp from the user to the online list _4zdV6H
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES9Q R*kM+@@
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");0upKm,L0J%WVK!y ~
if(!($insert)) {?#^J`baw
print "Useronline Insert Failed > ";*VY`)uj xC#T
}
S Ft3l q/bi7y+^C //delete the peoples which haven't been online/active in the last $timeoutseconds seconds.dj%n&@VG']g
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");S a;G"Qx9N)Y
if(!($delete)) {
y ~yq2@e7o print "Useronline Delete Failed > ";
!h,^tk-X1e0b }
;U&j)u+o Bhk //select the amount of people online, all uniques, which are online on THIS page4hq9N8FI Ga
$result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' "); ihOL7C{7n
if(!($result)) {
:W.j,L-Zh8C$S2Y b print "Useronline Select Error > ";S$o2R'V?x9Y)L!G
}$R*Y:s%aYt&p
//Count the number of rows = the number of people onlineD_v"| T|O
$user = mysql_num_rows($result);
'i~,xM;t;w)r //spit out the results
#`'V%NZUK'^:U mysql_close();
D;{ w#mi#yP if($user == 1) {*J|G~ `)a%o z@|"^
print("1 user online\n");(y0a*[2M c] h
} else {
P}R\ F"F$Iu'Fy print("$user users online\n");z[c)_zJ
} kIpQUO/k5e
?>t.G-`&o+I#SA
[url=http://www.now.cn/vhost/][img]http://b.todayisp.com/bbs/760x90h.gif[/img][/url]$N_GjX4j2A.i
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。
%P"h-Tq;I ~ T 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。
3i4~ ~^ f/X\&OC,hn.t 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。
bH%MF8kW L"wq 当然啦,这两款主机也是相当不错的。 s"` pu(tv
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
*V` YHMp 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
5HJR"M2LD 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]
(_ \n/y0SXQN 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]
/H v`G0gbeI 自己加QQ去问吧。

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