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！}?~ gz,`$iyKa
我是用PHP+MYSQL来写的，原理：网站在线人数的程序代码+后台有MYSQL数据库支持，可以直接统计出网站当前的在线人数。
首先我创建MYSQL数据库表。k f)ue}vi
CREATE TABLE tablename (
field type(max_length) DEFAULT 'default_value' (NOT) NULL
}可以使用的SQL语句。"\ YQrkxJ
CREATE TABLE useronline (
timestamp int(15) DEFAULT '0' NOT NULL,
ip varchar(40) NOT NULL,p(t!N|(^6{*v iv
file varchar(100) NOT NULL,
PRIMARY KEY (timestamp),)POu\+M ?'r2s
KEY ip (ip),
KEY file (file)(CN*VoZo,O
);下面我们是PHP脚本，首先我定义MYSQL的信息。*u+m-@ dNw$LXW;Z
$server = "localhost"; //你的服务器/i*_`!h.k.LI
$db_user = "root"; //你的mysql的用户名7xK5x+Pc-G1B
$db_pass = "password"; //你的mysql的密码!KGAn E,^u3yg
$database = "users"; //表的名字设置统计的时间(多少秒内在线人数)}#GMLt
$timeoutseconds = 300;取当前时间。
$timestamp = time();上面的完整代码：&QXOX[)w(FH |
<?phpY*wDm8k O2N
$server = "localhost"; //your serverb;ayo:@N
$db_user = "root"; //your mysql database username(cH$Yj-A6SU2}&W.M
$db_pass = "password"; //your mysql database password if any6C(v&Ce:R#?
$database = "users"; //the db name7@D`:PTin
$timeoutseconds = 300;//timeoutseconds limit Q|x0e&M(^vEq9~D j
//get the current time
$timestamp = time();
//calculate the lowest timestamp allowed
$timeout = $timestamp-$timeoutseconds;
?>连接mysql4DH`aHe Nc [L
mysql_connect('localhost', 'username', 'password');也允许使用变量形式。k!t5P%e{ D(uc
mysql_connect($server, $db_user, $db_pass);如果mysql数据库没有密码的话可以使用下面代码连接K5j*W)U}G`bp
mysql_connect($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。 ~(_*Nqy
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES5eou(Jn |
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");PLZ^b1@3Z
如果用户用错误信息的话，这样处理。#_f#D4Q!S!x2am
if(!($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。Pi kQ1F2@,@
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");同样给出删除记录出错的处理。6v/f|F+[;i
if(!($delete)) {
print "Useronline Delete Failed > ";FQ9E0z"d+lK6h[ F5]
}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L{:h^@9rslZ
mysql_num_rows(query);来统计用户，代码如下。u8B] {/j
$user = mysql_num_rows($result);最后关闭数据库。
mysql_close();显示在线的人数。yHC)EL)lc Yz
if($user == 1) {
print("1 user online\n");
} else {'h*L @6X*o'z#w
print("$user users online\n");
}最终把上面代码写成一个PHP文件如下。
<?php%by]eJ]m
//Put your basic server info here
$server = "localhost"; //normally localhost!})EzZ4LS9z,_We2R
$db_user = "root"; //your MySQL database username
$db_pass = "password"; //your MySQL database password9K(h ? sM[
$database = "users";x*bB-`!gH~^
$timeoutseconds = 300; //it will delete all people which haven't refreshed(so probbably are~6A)y)hY_3q'~x
// offline or inactive) in $timieoutseconds time (so it actually checks the people that are active in the last)jQ&Za&C(a-@#VQ;W
// $timeoutseconds seconds)
//this is where PHP gets the time
$timestamp = time();,fR{E_c
//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, $db_user);,])`rHW q ^w
//add the timestamp from the user to the online list9X)Q1G ?G$IIv
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");g]?l\'AK
if(!($insert)) {n`Va*u8U w6U#g
print "Useronline Insert Failed > ";@sQH'PN!a1GJ
}
//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)) {0^*P S(ro5rn
print "Useronline Delete Failed > ";&sgWh xuf
}
//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)) {'l+P'fp.iL
print "Useronline Select Error > ";
}
//Count the number of rows = the number of people online x0W._;@/W_
$user = mysql_num_rows($result);
//spit out the results
mysql_close();
if($user == 1) {
print("1 user online\n");(q!iPx P/~9Z@D1@wn
} else {
print("$user users online\n");
}
?>x8I(a+SmTo_
[url=http://www.now.cn/vhost/][img]http://b.todayisp.com/bbs/760x90h.gif[/img][/url]0d JV4u-^3z y
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。(R7vT'D_)d
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。G$uH+aNU@
我之前建站的时候选的是他们公司标准商务E型，因为这款机型还特别支持ASP.NET3.5(3.0/2.0/1.1)/ASP。 D*@^{ M@&K
当然啦，这两款主机也是相当不错的。
智强商务B型：Unix /Linux 操作系统+独立网页空间1000MB+送1000MB邮局空间+100MB MySQL数据库空间=1869元/年
标准商务B型：Unix /Linux 操作系统+独立网页空间500MB+送800MB邮局空间+60MB MySQL数据库空间=1365元/年
提供一下这个公司的联系方式：请见：[url=http://www.now.cn/vhost/]http://www.now.cn/vhost/[/url]
空间专线： 0756-2623871 QQ：168075865，好象还有全球免费网络电话:全球免费咨询电话 [url=http://www.now.cn/callcenter/call.net?LineName=55]http://www.now.cn/callcenter/call.net?LineName=55[/url] F$dXB v0_H}W6_
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！