刚用PHP写了一个网站在线人数的程序，请大家进来指点下！(页 1) - 电脑软件 - 捌玖网络工作室 |网页制作|平面设计|建站交流|代码资料|建站教程|主机域名|asp、php、jsp代码|网站素材

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！
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。F5c2Q HgBhNP
首先我创建MYSQL数据库表。
CREATE TABLE tablename (PV0N.a-B2I
field type(max_length) DEFAULT 'default_value' (NOT) NULL
}可以使用的SQL语句。
CREATE TABLE useronline (p'I6i6Ap.TW
timestamp int(15) DEFAULT '0' NOT NULL,
ip varchar(40) NOT NULL,1s6vdL|)C-?6X
file varchar(100) NOT NULL,,M4z0?]v
PRIMARY KEY (timestamp),
KEY ip (ip),9E prDusi VI0Z
KEY file (file)2T0Pn~4u
);下面我们是PHP脚本，首先我定义MYSQL的信息。
$server = "localhost"; //你的服务器
$db_user = "root"; //你的mysql的用户名
$db_pass = "password"; //你的mysql的密码N-HwB|
$database = "users"; //表的名字设置统计的时间(多少秒内在线人数)&H4X_x(r.I;F
$timeoutseconds = 300;取当前时间。_bLs2g7a[b
$timestamp = time();上面的完整代码：/\n$^!^)^\3{pg
<?php
$server = "localhost"; //your server
$db_user = "root"; //your mysql database username d$q.lc4ff(Y U$rs
$db_pass = "password"; //your mysql database password if any
$database = "users"; //the db name2Q^^q/?0] P$aVBb
$timeoutseconds = 300;//timeoutseconds limit
//get the current time
$timestamp = time();
//calculate the lowest timestamp allowedl8M2_Q0n-?It
$timeout = $timestamp-$timeoutseconds;
?>连接mysql4s"F6[b9B"x M!w/S
mysql_connect('localhost', 'username', 'password');也允许使用变量形式。
mysql_connect($server, $db_user, $db_pass);如果mysql数据库没有密码的话可以使用下面代码连接M[4p%\Wd
mysql_connect($server, $db_user);查询数据库的代码：
mysql_db_query('database', 'query');我们只要有访客就要增加一条记录。&Xp:}E!`+P
$insert = mysql_db_query($database, "INSERT INTO useronline VALUESk"J#IZ:t+s!U8p
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");
如果用户用错误信息的话，这样处理。
if(!($insert)) {P7GA HW
print "Useronline Insert Failed > ";2]M!em"d!ZA
}然后实现当超过设置的时间就删除该用户记录。
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");同样给出删除记录出错的处理。
if(!($delete)) {i/x^ S"_&M:Hy
print "Useronline Delete Failed > ";
}下面我们解决数据库中不同IP的问题
$result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");使用4Ac^"D~(SFq
mysql_num_rows(query);来统计用户，代码如下。 T;GQ-W`%Y
$user = mysql_num_rows($result);最后关闭数据库。3S(s@ub
mysql_close();显示在线的人数。
if($user == 1) {
print("1 user online\n");
} else {ZPj.G)ORJ
print("$user users online\n");'tJ F%~ cE+Feg
}最终把上面代码写成一个PHP文件如下。(C2Z2cP8`&px
<?php
//Put your basic server info heredVY:@-x;D;fN"yb
$server = "localhost"; //normally localhost,{1A$V+l8`]h
$db_user = "root"; //your MySQL database usernameaH6y${yy*A)U
$db_pass = "password"; //your MySQL database password
$database = "users";9T3P)sL)n`o
$timeoutseconds = 300; //it will delete all people which haven't refreshed(so probbably are8q;oV g!F)HE9{.~/|B
// offline or inactive) in $timieoutseconds time (so it actually checks the people that are active in the last-[6o)J6Qv*r1l3{x
// $timeoutseconds seconds)
//this is where PHP gets the time
$timestamp = time();
//counts the timeout, all people which have been seen last online in earlier than this timestamp, will get removed1_Z4F\;B7DK;[
$timeout = $timestamp-$timeoutseconds;3ml'_2~'b
//connect to database
mysql_connect($server, $db_user);,Q\JV Xa%N!U
//add the timestamp from the user to the online list
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES}3Xq7UQ6s
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");3i4Lf0Zt;]W6E
if(!($insert)) {t j#nep+cz
print "Useronline Insert Failed > ";
}q|n,]zZ1A
//delete the peoples which haven't been online/active in the last $timeoutseconds seconds.
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");
if(!($delete)) {
print "Useronline Delete Failed > ";
}5_-z2y.M0])L*LA?
//select the amount of people online, all uniques, which are online on THIS page]3vDw?W
$result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");
if(!($result)) {!^h,q8};Z,o
print "Useronline Select Error > ";&ZM'lm8ea%Z\
}Xc)?],Zm V
//Count the number of rows = the number of people online
$user = mysql_num_rows($result);1y;J#h-YI?i5w e
//spit out the results(B{t\V)|2A~
mysql_close();
if($user == 1) {Y'c9? i%f+?.B
print("1 user online\n");#n F;d5KvG T+Dt!J
} else {
print("$user users online\n");
}
?>Iq9a;}`+TW
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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。
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。g2O`DV!q*m
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。
当然啦，这两款主机也是相当不错的。[p-F$S(Kk ^
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5TK1[A%fPgU3?
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;FX(NQ0NXS:Ea
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] o/a^a7zsI)\;k CP
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自己加QQ去问吧。

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刚用PHP写了一个网站在线人数的程序，请大家进来指点下！