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！g,c E}"i.|#`{+v
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。
首先我创建MYSQL数据库表。
CREATE TABLE tablename (
field type(max_length) DEFAULT 'default_value' (NOT) NULL+d6f+c1Gf B EK&h
}可以使用的SQL语句。{*y%R[p8m0e3M,Cf
CREATE TABLE useronline (
timestamp int(15) DEFAULT '0' NOT NULL,
ip varchar(40) NOT NULL,
file varchar(100) NOT NULL,8}^F+j {i5Mr
PRIMARY KEY (timestamp),x0[$V"~L#A*}:Q^
KEY ip (ip),O/I1J;h8QI
KEY file (file)
);下面我们是PHP脚本，首先我定义MYSQL的信息。1m8B Y*O*eV7pi
$server = "localhost"; //你的服务器"\ \#h3Si(x:Q{]
$db_user = "root"; //你的mysql的用户名t Qq"?k#v
$db_pass = "password"; //你的mysql的密码WQ0o{rtA;tw1X
$database = "users"; //表的名字设置统计的时间(多少秒内在线人数) _2~Wfa9@ig
$timeoutseconds = 300;取当前时间。
$timestamp = time();上面的完整代码：
<?php&OTF!jms.nG)q's
$server = "localhost"; //your server`%\8j(?$a2@c
$db_user = "root"; //your mysql database username
$db_pass = "password"; //your mysql database password if anyB&h'Jom)A~4qA I
$database = "users"; //the db name
$timeoutseconds = 300;//timeoutseconds limit
//get the current time
$timestamp = time();
//calculate the lowest timestamp allowed
$timeout = $timestamp-$timeoutseconds;
?>连接mysql
mysql_connect('localhost', 'username', 'password');也允许使用变量形式。G0zw"r7X$T%Y0I
mysql_connect($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。
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES9y.f WV"fn
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");
如果用户用错误信息的话，这样处理。
if(!($insert)) {:{W1X#QJka*b%b1F#C3^u
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<$timeout");同样给出删除记录出错的处理。9NL%tC3YP[RY7KUW
if(!($delete)) {
print "Useronline Delete Failed > ";A7wWuR n|i z!p3v
}下面我们解决数据库中不同IP的问题1`Rj F_ Eu
$result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");使用
mysql_num_rows(query);来统计用户，代码如下。)Z$z#j9Uha N
$user = mysql_num_rows($result);最后关闭数据库。;h&F f mrS
mysql_close();显示在线的人数。:b CDa HB8cm$L
if($user == 1) {9cs*pe|dRZ
print("1 user online\n");+@z ^zT UQ3J
} else {'k5QtC9k@B'e"o2Za
print("$user users online\n");
}最终把上面代码写成一个PHP文件如下。
<?php
//Put your basic server info hereU@?Q?l-h7x
$server = "localhost"; //normally localhost
$db_user = "root"; //your MySQL database usernameI4Om[?
$db_pass = "password"; //your MySQL database passwordoZ/}\^ f"j
$database = "users";
$timeoutseconds = 300; //it will delete all people which haven't refreshed(so probbably are o i;~y#LwJ%V7g#X
// offline or inactive) in $timieoutseconds time (so it actually checks the people that are active in the last
// $timeoutseconds seconds)WTfeRG \,C
//this is where PHP gets the time
$timestamp = time();YC7m+BVw5k H
//counts the timeout, all people which have been seen last online in earlier than this timestamp, will get removed~ T6u:J;fM*N
$timeout = $timestamp-$timeoutseconds;
//connect to databaseN@8s s KrU
mysql_connect($server, $db_user);i!DvV(c I#bKVh
//add the timestamp from the user to the online listj!U6f,|:G {3VIIN{yR
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");2U#xi^'n!LH(Up
if(!($insert)) {
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<$timeout");(x8h:A4bM_K] Ob
if(!($delete)) {
print "Useronline Delete Failed > ";0P o2G-T/Iie2_a0v
}
//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='".$_SERVER['PHP_SELF']."' ");QRIcG2H$`n \zgK
if(!($result)) {
print "Useronline Select Error > ";a}Il2^Z&_R%X
}
//Count the number of rows = the number of people online-o4XX*Tst]
$user = mysql_num_rows($result);
//spit out the results
mysql_close();vSzvA$I9a
if($user == 1) {;Qm$l;S S9jg.Qde
print("1 user online\n");6[9ztqj_Hk
} else {%R&z,~;_ p
print("$user users online\n");
}$inNO:RKX?/f
?> PD7SQe1L:j,?;SWl
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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。ni~i8U f
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。!vR%TwApzj
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。3y!~Y9e[C }A
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 fg*n*Z
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&~6Nn&L(V9Zk
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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！