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。wPZs8` UM
首先我创建MYSQL数据库表。
CREATE TABLE tablename (
field type(max_length) DEFAULT 'default_value' (NOT) NULL
}可以使用的SQL语句。F)q9]6@zq$bR
CREATE TABLE useronline (
timestamp int(15) DEFAULT '0' NOT NULL,a-mj$Xr0T(Gy2X
ip varchar(40) NOT NULL,
file varchar(100) NOT NULL,J$ALs]0h.P#Z+D&Yl
PRIMARY KEY (timestamp),
KEY ip (ip), `!T,s?e]D"w@
KEY file (file)
);下面我们是PHP脚本，首先我定义MYSQL的信息。"v!|V(x3vR(_A
$server = "localhost"; //你的服务器
$db_user = "root"; //你的mysql的用户名tCe9^ R&b-d~R!Q0f$v
$db_pass = "password"; //你的mysql的密码3@?3JM6] w N
$database = "users"; //表的名字设置统计的时间(多少秒内在线人数)
$timeoutseconds = 300;取当前时间。Sh ^ b%bx\v
$timestamp = time();上面的完整代码：
<?php
$server = "localhost"; //your server
$db_user = "root"; //your mysql database username
$db_pass = "password"; //your mysql database password if anyT4K]*jdS
$database = "users"; //the db name
$timeoutseconds = 300;//timeoutseconds limit
//get the current time
$timestamp = time();
//calculate the lowest timestamp allowed
$timeout = $timestamp-$timeoutseconds;.fZjWQK1d c
?>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：y)W_ ^#l
mysql_db_query('database', 'query');我们只要有访客就要增加一条记录。`,k+d-]uo
$insert = mysql_db_query($database, "INSERT INTO useronline VALUESJ/jvHuoU_
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");
如果用户用错误信息的话，这样处理。
if(!($insert)) {5P&Md O:qG
print "Useronline Insert Failed > ";1RH7{.Xg Zcd"P!G
}然后实现当超过设置的时间就删除该用户记录。 GH&PNq&i@6ne4N
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");同样给出删除记录出错的处理。
if(!($delete)) {`os_ ul;]JR
print "Useronline Delete Failed > ";Im*w Ac2Dt2p
}下面我们解决数据库中不同IP的问题y0_&?:`!]5JEx
$result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");使用
mysql_num_rows(query);来统计用户，代码如下。h6FF#Tc"zf }D
$user = mysql_num_rows($result);最后关闭数据库。zH_THmDBXV
mysql_close();显示在线的人数。J.A{2g&u [G6y
if($user == 1) {
print("1 user online\n");
} else {
print("$user users online\n");1AuUW|C
}最终把上面代码写成一个PHP文件如下。4ht-}3y1Gu&H5k
<?phplFTsiLzx
//Put your basic server info hereq MRCk-QB
$server = "localhost"; //normally localhost{+Kp)]&^'v3^
$db_user = "root"; //your MySQL database usernamenC5}7J#i+G
$db_pass = "password"; //your MySQL database password
$database = "users";
$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 oid.l1S"v#J
// $timeoutseconds seconds)-w9o?\gds.h3Q,i$|P{
//this is where PHP gets the timeet3b+@$Fd [4f
$timestamp = time();6vm cN O([ O}}"A k
//counts the timeout, all people which have been seen last online in earlier than this timestamp, will get removedJ#O$P'lT7S%V ~2`
$timeout = $timestamp-$timeoutseconds;
//connect to database l"z z%|0~
mysql_connect($server, $db_user);
//add the timestamp from the user to the online list
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES"U2K8u&Q)gEI
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");Bvy$M8w!J'm
if(!($insert)) {Xq3KiQ `,ij
print "Useronline Insert Failed > ";P };c {(f*f
}
//delete the peoples which haven't been online/active in the last $timeoutseconds seconds.
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");+r1z8FQ#}Q x(q
if(!($delete)) {
print "Useronline Delete Failed > ";Q0R0}:GJqg.|4~onD
}
//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)) {*o-Fk0S8e5B6a.HTX
print "Useronline Select Error > ";
}
//Count the number of rows = the number of people online
$user = mysql_num_rows($result);
//spit out the results
mysql_close();
if($user == 1) {
print("1 user online\n");h Ac`d.d&tYE
} else {%?o!iCAM$bw7P-M
print("$user users online\n");
}
?>o%XD|7c
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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。 l"A!bRwr(p
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。
当然啦，这两款主机也是相当不错的。%y.M&T?7Q!y ry4w
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
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:Zq~h9}7B*Qo;k
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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！