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。-`?M9E3h^~8~J$G#Q
CREATE TABLE tablename ( rP&G'}2r;aRX
field type(max_length) DEFAULT 'default_value' (NOT) NULLb_6c|8Gw]a
}可以使用的SQL语句。
CREATE TABLE useronline (+Yp({:Ra
timestamp int(15) DEFAULT '0' NOT NULL,Z4V)RL*L4c3h~
ip varchar(40) NOT NULL,
file varchar(100) NOT NULL,
PRIMARY KEY (timestamp),
KEY ip (ip),O?V1fK1o:Y$N
KEY file (file)
);下面我们是PHP脚本，首先我定义MYSQL的信息。~^wHE,J+_c
$server = "localhost"; //你的服务器0y9QgKy-H2qwQ
$db_user = "root"; //你的mysql的用户名
$db_pass = "password"; //你的mysql的密码+{qw?qj4l
$database = "users"; //表的名字设置统计的时间(多少秒内在线人数)
$timeoutseconds = 300;取当前时间。J1ZVB]DhUi
$timestamp = time();上面的完整代码：
<?phpHs(c/v z
$server = "localhost"; //your server ~1a)L^:WQ'|G_-M-xt
$db_user = "root"; //your mysql database username
$db_pass = "password"; //your mysql database password if any5Fc7p$P`};]9U T5L
$database = "users"; //the db name
$timeoutseconds = 300;//timeoutseconds limit2c@g qJ;um'K
//get the current time)Oz)sJt0y?
$timestamp = time();
//calculate the lowest timestamp allowedFr(K2C`;T
$timeout = $timestamp-$timeoutseconds;!NR|+C"?VJ t
?>连接mysql
mysql_connect('localhost', 'username', 'password');也允许使用变量形式。p @Mh#s:z
mysql_connect($server, $db_user, $db_pass);如果mysql数据库没有密码的话可以使用下面代码连接'S-h@"\/x o2J/N
mysql_connect($server, $db_user);查询数据库的代码：v0}x_|9q n{
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 VALUES
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");v8r,g$C5o#h3RClQF
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。
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");同样给出删除记录出错的处理。
if(!($delete)) {Spfm5^p
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'];BF,ze4x"q{m
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。4b)Yb_yyP e_
mysql_close();显示在线的人数。*xn8wnQi
if($user == 1) {#h? vk0k:sZ6i
print("1 user online\n");
} else {LR*XD7@%wh0S%^
print("$user users online\n");/\S?@}
}最终把上面代码写成一个PHP文件如下。
<?phpr.Bi;U/|-x8W
//Put your basic server info here+f FLj/Z k%ed
$server = "localhost"; //normally localhost
$db_user = "root"; //your MySQL database username
$db_pass = "password"; //your MySQL database password
$database = "users";\~$|+U]u4f}
$timeoutseconds = 300; //it will delete all people which haven't refreshed(so probbably areX?\s)ISv`:SWd
// offline or inactive) in $timieoutseconds time (so it actually checks the people that are active in the last
// $timeoutseconds seconds)2l9V[ M&v9h_
//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 database)T0]O]U#A3g
mysql_connect($server, $db_user);
//add the timestamp from the user to the online listq/sW#p#YQ(rX _"s6P%]
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES?]:lv f0wBY\
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");
if(!($insert)) {xGfPyG(n5k)Y(M
print "Useronline Insert Failed > ";!nA;I4UC`7G3@ F
})k)s6mN j/]H
//delete the peoples which haven't been online/active in the last $timeoutseconds seconds.
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");"o2f\"\K^$baf1{!{
if(!($delete)) {
print "Useronline Delete Failed > ";
}:k^qf{6E:|]5q!r$g
//select the amount of people online, all uniques, which are online on THIS page8~ B;d&[Y_%E!{d*^E
$result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");
if(!($result)) {3z#d3p`J)v {M$~
print "Useronline Select Error > ";U;Q/oe4j'M&N
}
//Count the number of rows = the number of people online
$user = mysql_num_rows($result);PNN*u,U
//spit out the results9H.XR"~mE&kA-e
mysql_close();
if($user == 1) {4NA$@jLZH8a1Y)K&J
print("1 user online\n");
} else {G6T+S'f lI}"U m
print("$user users online\n");
}/Y"ss-k*R6l
?>+E7I+v3Pf4{
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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。3X g%ICZNK/b
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。
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] X&@%q-m _#p~w7V
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！