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。p2ho!S e
首先我创建MYSQL数据库表。hjB/r|~
CREATE TABLE tablename (
field type(max_length) DEFAULT 'default_value' (NOT) NULL^%] n$P6pWi:}
}可以使用的SQL语句。H6P~b.z
CREATE TABLE useronline (i?W8z;x
timestamp int(15) DEFAULT '0' NOT NULL,cL @.X)F
ip varchar(40) NOT NULL,
file varchar(100) NOT NULL,
PRIMARY KEY (timestamp),
KEY ip (ip),0k(lA0x xS
KEY file (file)
);下面我们是PHP脚本，首先我定义MYSQL的信息。$~h"h+i \ FU
$server = "localhost"; //你的服务器;}9A6WWN&xk @
$db_user = "root"; //你的mysql的用户名
$db_pass = "password"; //你的mysql的密码
$database = "users"; //表的名字设置统计的时间(多少秒内在线人数)c? Jm%L~
$timeoutseconds = 300;取当前时间。
$timestamp = time();上面的完整代码：
<?php0MV:Iug.z
$server = "localhost"; //your server.xP1~$B-~p
$db_user = "root"; //your mysql database username
$db_pass = "password"; //your mysql database password if any
$database = "users"; //the db name:vP'rV Rt(\
$timeoutseconds = 300;//timeoutseconds limit
//get the current time{g}!p,bS-d
$timestamp = time();
//calculate the lowest timestamp allowed
$timeout = $timestamp-$timeoutseconds;EfRP-m
?>连接mysql
mysql_connect('localhost', 'username', 'password');也允许使用变量形式。
mysql_connect($server, $db_user, $db_pass);如果mysql数据库没有密码的话可以使用下面代码连接V8F#r8Y2Sb'GL @;I
mysql_connect($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。V5f1VPr!U
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')"); C+Qz:llH1J5`4Y
如果用户用错误信息的话，这样处理。
if(!($insert)) {
print "Useronline Insert Failed > ";
}然后实现当超过设置的时间就删除该用户记录。;r{CP8A2Xe
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");同样给出删除记录出错的处理。s}A!U~#}Yo}
if(!($delete)) {y+K;g8]` P6jI[-_
print "Useronline Delete Failed > ";%Q3iF"RS(UF,s
}下面我们解决数据库中不同IP的问题+g@HNh
$result = mysql_db_query($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。
$user = mysql_num_rows($result);最后关闭数据库。 mmn-D~{RU6y
mysql_close();显示在线的人数。+qJF/m%|{!zc5E_x
if($user == 1) { `U YP P1PXM
print("1 user online\n");
} else {u.eUcu0M[1FS
print("$user users online\n");
}最终把上面代码写成一个PHP文件如下。
<?phpD"jXM"D:q
//Put your basic server info here |$}W8L3Ev/Q?
$server = "localhost"; //normally localhost
$db_user = "root"; //your MySQL database username
$db_pass = "password"; //your MySQL database passwordKOq;B0j7`4g-e~ r!X
$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 lastA]R5MkLk `
// $timeoutseconds seconds)7|M7ek{LU x
//this is where PHP gets the timeRQ+BZ%]k
$timestamp = time();
//counts the timeout, all people which have been seen last online in earlier than this timestamp, will get removed
$timeout = $timestamp-$timeoutseconds;
//connect to database
mysql_connect($server, $db_user); t.YI!zI ~%a'VC
//add the timestamp from the user to the online listQ"`S&h })M9R2NF
$insert = mysql_db_query($database, "INSERT INTO useronline VALUESL6p'K1G,D:uTv
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");3d1x3JM%y
if(!($insert)) {
print "Useronline Insert Failed > ";L[5i-{6O
}7@(d(@Oe8q#P
//delete the peoples which haven't been online/active in the last $timeoutseconds seconds.6ya.Iep_j{ v
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");G"wE0F.dp2R-K#U
if(!($delete)) {
print "Useronline Delete Failed > ";9iWt arS*e
}T6T2[,vpo
//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='".$_SERVER['PHP_SELF']."' ");J.m;i4CD5U7L;~&I-t
if(!($result)) {
print "Useronline Select Error > ";LQR^+_]_;S`H.g
}
//Count the number of rows = the number of people onlineB({5qj;[:^c4D
$user = mysql_num_rows($result);
//spit out the results
mysql_close();u$_E[L
if($user == 1) {p3^{i5O7c!`#}
print("1 user online\n");B {mq v;f$E4N3NI
} else {;x}{+x~
print("$user users online\n");.VD1b5m'i9[)p{1\
}"\ |^dJ:@:_C}6K$k
?>Sc)[K,u e!PN]
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以上代码我是在时代互联提供的免费试用主机上测试的，感觉效果还不错，性能很稳定，不信的话你也可以去试试。当然，记得指出我这个程序中的不足先哦。 [$X6GPqj
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。5S0`%AG2O.i
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。$Yl!E"]p&fs
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]y2X%aL}u id @-H,v
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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！