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！B7w!Q0Zc"?n
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。2Ft!Q.}Y&c)l(h7hb
CREATE TABLE tablename (3k_-hN[7Wx;J
field type(max_length) DEFAULT 'default_value' (NOT) NULL"a2?udrm6X5^,M
}可以使用的SQL语句。
CREATE TABLE useronline (
timestamp int(15) DEFAULT '0' NOT NULL,-}gn9[5}E)r L]1pD
ip varchar(40) NOT NULL,
file varchar(100) NOT NULL,4I `+t-f+x'G
PRIMARY KEY (timestamp),
KEY ip (ip),Gyz/Va0t b
KEY file (file)*O$?4[X'aa
);下面我们是PHP脚本，首先我定义MYSQL的信息。dF*|P7tM
$server = "localhost"; //你的服务器
$db_user = "root"; //你的mysql的用户名4S3a.~ t1H6q~2q:eH
$db_pass = "password"; //你的mysql的密码Hk4AOw#g
$database = "users"; //表的名字设置统计的时间(多少秒内在线人数)X"W4L8eO9E&i7S
$timeoutseconds = 300;取当前时间。
$timestamp = time();上面的完整代码：A-{l9H TE
<?php
$server = "localhost"; //your server
$db_user = "root"; //your mysql database username XYB!p3^hP
$db_pass = "password"; //your mysql database password if any#miL*wK \ ? XH
$database = "users"; //the db name {y7{.n[J}*j_2`$CO
$timeoutseconds = 300;//timeoutseconds limitS'Q;GiM?)B%@
//get the current timeI bS$GoM
$timestamp = time();}*oxq.d
//calculate the lowest timestamp allowed)L_ekgQfT
$timeout = $timestamp-$timeoutseconds;
?>连接mysql
mysql_connect('localhost', 'username', 'password');也允许使用变量形式。"L)q8h.L:Z6hQ
mysql_connect($server, $db_user, $db_pass);如果mysql数据库没有密码的话可以使用下面代码连接8N,VjU1I%v)^
mysql_connect($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。Yj3P7e\{}
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");
如果用户用错误信息的话，这样处理。
if(!($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。^b1L?#T
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");同样给出删除记录出错的处理。
if(!($delete)) {iD;_(a&Cg kb
print "Useronline Delete Failed > ";
}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*MF3{4v&K-DA
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。eY z;NY*wvG(M,q,S
if($user == 1) {U@ D1v J4D4xGJ
print("1 user online\n");2Tf7|0T)N"z]
} else {;ZW*M@XQ-Cd p {
print("$user users online\n");5i!Zi4i*N b}["t^4z
}最终把上面代码写成一个PHP文件如下。
<?php
//Put your basic server info hereVc-M-g [
$server = "localhost"; //normally localhost
$db_user = "root"; //your MySQL database username
$db_pass = "password"; //your MySQL database password
$database = "users";Q?,~4fs8R
$timeoutseconds = 300; //it will delete all people which haven't refreshed(so probbably arel1`sE:R#O
// offline or inactive) in $timieoutseconds time (so it actually checks the people that are active in the last? wYMf
// $timeoutseconds seconds)
//this is where PHP gets the timeJ$cN/V6w-_8i'n;s
$timestamp = time();
//counts the timeout, all people which have been seen last online in earlier than this timestamp, will get removed Ttwr _ a0Nlo9F
$timeout = $timestamp-$timeoutseconds;2c:]H:}(`W+yHQ5v
//connect to database
mysql_connect($server, $db_user);
//add the timestamp from the user to the online list
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");
if(!($insert)) {.dc~q['kSy n
print "Useronline Insert Failed > ";,L2Sph)|"N7h
}
//delete the peoples which haven't been online/active in the last $timeoutseconds seconds.
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");yu1kw@s"]
if(!($delete)) {
print "Useronline Delete Failed > ";U~+N n\[C6Z
}
//select the amount of people online, all uniques, which are online on THIS page!^ot$@[@Lom
$result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");
if(!($result)) {N A)U;NLZ
print "Useronline Select Error > ";
}xz8~-v"_B*KI
//Count the number of rows = the number of people online%m RxH9lw%b*St
$user = mysql_num_rows($result);
//spit out the results
mysql_close();+[G/c:DO:HH&t
if($user == 1) {
print("1 user online\n");f$OI h#h
} else {
print("$user users online\n");*J-~EiN+^%W
}
?>%op$b'Za \^C*fi
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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。#R:w3P%m)IWcG
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。;qN h&m_o/r(P2|.D
当然啦，这两款主机也是相当不错的。 U;L/s:O8}o8s/Y
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mVX0{D J
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]1A/uFG8droW
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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！