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。
首先我创建MYSQL数据库表。+p(xh)lap
CREATE TABLE tablename (
field type(max_length) DEFAULT 'default_value' (NOT) NULLt9Q {}bR]
}可以使用的SQL语句。
CREATE TABLE useronline (
timestamp int(15) DEFAULT '0' NOT NULL,duO)qm+S3t!SE%n
ip varchar(40) NOT NULL,b,~ Q.e^"^%z
file varchar(100) NOT NULL,}*wCk o [
PRIMARY KEY (timestamp), k8Zt1KgK xQ:P
KEY ip (ip),:IA2\'`k(GO
KEY file (file)
);下面我们是PHP脚本，首先我定义MYSQL的信息。b _{bk,p
$server = "localhost"; //你的服务器7Yt};N/W
$db_user = "root"; //你的mysql的用户名
$db_pass = "password"; //你的mysql的密码 R,^,ON&eA"H? `
$database = "users"; //表的名字设置统计的时间(多少秒内在线人数)fuVTUN8H?3Fs
$timeoutseconds = 300;取当前时间。aJ*{|b0j
$timestamp = time();上面的完整代码：gw,B-H7h.uN
<?phpg1^+Au;Dw
$server = "localhost"; //your servere^b K)H j4Y2q
$db_user = "root"; //your mysql database username
$db_pass = "password"; //your mysql database password if any
$database = "users"; //the db name
$timeoutseconds = 300;//timeoutseconds limit
//get the current timeg&v`y:g#i.o%U;T
$timestamp = time(); g/pak"E` f$}
//calculate the lowest timestamp allowed
$timeout = $timestamp-$timeoutseconds; M@ zj5w#GH A
?>连接mysql
mysql_connect('localhost', 'username', 'password');也允许使用变量形式。
mysql_connect($server, $db_user, $db_pass);如果mysql数据库没有密码的话可以使用下面代码连接(q^V9s0F!l-Wc9D
mysql_connect($server, $db_user);查询数据库的代码：-}bJ&V0x,Wp)e5py-VU
mysql_db_query('database', 'query');我们只要有访客就要增加一条记录。q!D@Y4DyErxj
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES+A*b+pLb T%d!AZ
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");"w|C1c}B!Q.iT
如果用户用错误信息的话，这样处理。v!h7QC2A
if(!($insert)) {H_~Y&p-LPI
print "Useronline Insert Failed > ";DStTUQFz!CC
}然后实现当超过设置的时间就删除该用户记录。8x vzk2eGc
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");同样给出删除记录出错的处理。
if(!($delete)) {
print "Useronline Delete Failed > ";? o?iph
}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w5hc(oM,zd ~
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。
mysql_close();显示在线的人数。
if($user == 1) {
print("1 user online\n");
} else {2a"E~%ov3[j
print("$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 herehX3`uH|s:I%J?
$server = "localhost"; //normally localhost%K+ztD$t
$db_user = "root"; //your MySQL database username
$db_pass = "password"; //your MySQL database password.\ np^s{0Gonh
$database = "users";
$timeoutseconds = 300; //it will delete all people which haven't refreshed(so probbably are*sB;`,P![(R4c]
// offline or inactive) in $timieoutseconds time (so it actually checks the people that are active in the lastSQjTL)Q b
// $timeoutseconds seconds),jg~%]F].H5~8],t f_
//this is where PHP gets the time
$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 databaseG6j c5s'JY)Lz:b
mysql_connect($server, $db_user);Tu'F&EGRZAG
//add the timestamp from the user to the online list
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");4x"l?9OK'v.S%Vq
if(!($insert)) { Z'wAu$mUa
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<$timeout");
if(!($delete)) {M sp C!^-S
print "Useronline Delete Failed > ";
}nZX't4T`'K/U
//select the amount of people online, all uniques, which are online on THIS page)Pn/O(`,\,OGx
$result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");
if(!($result)) {
print "Useronline Select Error > ";
}
//Count the number of rows = the number of people online1N?Cb;Ca
$user = mysql_num_rows($result);
//spit out the results6H&jj,P"J n;}Ge6s+b v
mysql_close();M9j5u;a2M@$P we I9w
if($user == 1) {@%mR/l&y
print("1 user online\n");Y6UfJ0O!g
} else {q1q4?WxOCY
print("$user users online\n");
}
?>
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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。 V%quiF4P
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。
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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] 6w!K} ?qmQ
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！