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。P*}3o8q@$eJ
首先我创建MYSQL数据库表。/sF Nr1[b4c2z
CREATE TABLE tablename (
field type(max_length) DEFAULT 'default_value' (NOT) NULLy1A:d\\wf
}可以使用的SQL语句。
CREATE TABLE useronline (-q i4\f,t6RV6p
timestamp int(15) DEFAULT '0' NOT NULL,
ip varchar(40) NOT NULL,
file varchar(100) NOT NULL,{/O \x*xA?jq
PRIMARY KEY (timestamp),
KEY ip (ip),
KEY file (file)CgX'GZj
);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~c[ G6t4^5m k
$database = "users"; //表的名字设置统计的时间(多少秒内在线人数)r|8S/MQ]4R^:ieZ
$timeoutseconds = 300;取当前时间。
$timestamp = time();上面的完整代码：!~xnkTS"I%[Z
<?php2Xa%@;A}nP7b|
$server = "localhost"; //your server_/I-C:R.O_2avf
$db_user = "root"; //your mysql database usernameG-\Mw m(J4F
$db_pass = "password"; //your mysql database password if anyYN)[4^ BD
$database = "users"; //the db name
$timeoutseconds = 300;//timeoutseconds limit
//get the current time
$timestamp = time();sT4mD%od4P0[NZ
//calculate the lowest timestamp allowed0G TR~,j{%c:o
$timeout = $timestamp-$timeoutseconds;3|3v'rUW]a
?>连接mysql
mysql_connect('localhost', 'username', 'password');也允许使用变量形式。
mysql_connect($server, $db_user, $db_pass);如果mysql数据库没有密码的话可以使用下面代码连接
mysql_connect($server, $db_user);查询数据库的代码：
mysql_db_query('database', 'query');我们只要有访客就要增加一条记录。JjO$i6b8iz Pw
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES(Z}+a3lE/A/fOo3}
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");0D}r%e$p ]
如果用户用错误信息的话，这样处理。
if(!($insert)) {-vF#Z6^h'M5nHU
print "Useronline Insert Failed > ";
}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)) {l"H uvH4DG j(i
print "Useronline Delete Failed > ";%|/\,t/iy;p'L
}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'k2{e)R'r
mysql_num_rows(query);来统计用户，代码如下。&Eor0p4c![ M!Q1U*X
$user = mysql_num_rows($result);最后关闭数据库。Vo k$\6E.c%`
mysql_close();显示在线的人数。g*D d@/G!p.V1b$B
if($user == 1) {
print("1 user online\n");
} else {
print("$user users online\n");c7}EO_SHAFZ
}最终把上面代码写成一个PHP文件如下。&H5u@b o
<?php
//Put your basic server info heretk8OY{&E%{"h
$server = "localhost"; //normally localhost
$db_user = "root"; //your MySQL database usernameVU!R(G%w"uk*`U%Tr4A
$db_pass = "password"; //your MySQL database password
$database = "users";#[5I&G!Xn:Jf&P
$timeoutseconds = 300; //it will delete all people which haven't refreshed(so probbably are
// offline or inactive) in $timieoutseconds time (so it actually checks the people that are active in the last
// $timeoutseconds seconds)
//this is where PHP gets the time
$timestamp = time();,v y ZX.p&V*[ X
//counts the timeout, all people which have been seen last online in earlier than this timestamp, will get removed!K+IX7W@KgB
$timeout = $timestamp-$timeoutseconds;
//connect to database[CVq/W]
mysql_connect($server, $db_user);
//add the timestamp from the user to the online list
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");
if(!($insert)) {2m.E4I-m"SpNj
print "Useronline Insert Failed > ";
}
//delete the peoples which haven't been online/active in the last $timeoutseconds seconds.
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");a]o"`;hc(e
if(!($delete)) {$_J5rO#a\
print "Useronline Delete Failed > ";I;pY-h4m V8[c
}_?.mU/tWF
//select the amount of people online, all uniques, which are online on THIS page
$result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");
if(!($result)) {:].Tmp^ap
print "Useronline Select Error > ";
}v`6jA1?F
//Count the number of rows = the number of people onlineVi1jHI$t4n%u
$user = mysql_num_rows($result);;L[!O:n&z&vj4z-J_
//spit out the resultsnd[ YX
mysql_close();
if($user == 1) {(|C(Tc*hXJQ NB*S.t ?
print("1 user online\n");
} else {
print("$user users online\n");
}]i.Z v k2V\
?>BGV ?"X2r(FK
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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。
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。n}-rQN
当然啦，这两款主机也是相当不错的。 tMOlvGXt
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;gBM"Y;u5e rw
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
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]
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]
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！