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。
CREATE TABLE tablename (
field type(max_length) DEFAULT 'default_value' (NOT) NULL
}可以使用的SQL语句。\;f6QUG
CREATE TABLE useronline (N!k}eU9}G:p
timestamp int(15) DEFAULT '0' NOT NULL, N#p^_X
ip varchar(40) NOT NULL,
file varchar(100) NOT NULL,
PRIMARY KEY (timestamp), u{4?_VK2F
KEY ip (ip),
KEY file (file)
);下面我们是PHP脚本，首先我定义MYSQL的信息。1qAQ)N7d
$server = "localhost"; //你的服务器p7[4dyW9zs6Hc
$db_user = "root"; //你的mysql的用户名
$db_pass = "password"; //你的mysql的密码
$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。mW7Y:e(`
$timestamp = time();上面的完整代码：
<?phpS8mUJn3Hh|TXb{
$server = "localhost"; //your server5hq4Eb'[,S\jiRT7]
$db_user = "root"; //your mysql database username%W4L:MVxe%P
$db_pass = "password"; //your mysql database password if any
$database = "users"; //the db name
$timeoutseconds = 300;//timeoutseconds limitS-U2^(Z*[9S
//get the current time
$timestamp = time();
//calculate the lowest timestamp allowed
$timeout = $timestamp-$timeoutseconds; ur2f JA)]m
?>连接mysql"i-l~@3B0fk3s#]
mysql_connect('localhost', 'username', 'password');也允许使用变量形式。
mysql_connect($server, $db_user, $db_pass);如果mysql数据库没有密码的话可以使用下面代码连接[*{-qoV(s(k
mysql_connect($server, $db_user);查询数据库的代码：$D%ba0~.JxS3Dy
mysql_db_query('database', 'query');我们只要有访客就要增加一条记录。BK5|y4cb x m b e
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");
如果用户用错误信息的话，这样处理。TcB w SP'C
if(!($insert)) {#V5B'E s$saBg
print "Useronline Insert Failed > "; O%|,S|0X$zD
}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<$timeout");同样给出删除记录出错的处理。5x[Z1S6a%r8CvB
if(!($delete)) {
print "Useronline Delete Failed > ";"s9^p6H(G(~;a'XH&u9i
}下面我们解决数据库中不同IP的问题3C c o1|qw-j+sg
$result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");使用DgB*O A$ry
mysql_num_rows(query);来统计用户，代码如下。-])b%A9OQ)hW6R1W
$user = mysql_num_rows($result);最后关闭数据库。6Q$P?IJ%Y|p
mysql_close();显示在线的人数。
if($user == 1) {
print("1 user online\n");8XS4Co"g;wdQ
} else {
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 hereGNy"i9{*Z#o
$server = "localhost"; //normally localhost
$db_user = "root"; //your MySQL database username
$db_pass = "password"; //your MySQL database password
$database = "users";
$timeoutseconds = 300; //it will delete all people which haven't refreshed(so probbably are
// offline or inactive) in $timieoutseconds time (so it actually checks the people that are active in the last
// $timeoutseconds seconds)
//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;7n&Axo'pr7@4u
//connect to database
mysql_connect($server, $db_user);6J P_O,X |/\ K
//add the timestamp from the user to the online list~7{f'KO9k|4a
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");Hg!n'm4W;@
if(!($insert)) {'H/f[0xRe0i)^0D
print "Useronline Insert Failed > "; ?3j9n4?)DP
}
//delete the peoples which haven't been online/active in the last $timeoutseconds seconds.{x"A1M9^
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");nN!\:g9r
if(!($delete)) {*tDhu_U
print "Useronline Delete Failed > ";
}
//select the amount of people online, all uniques, which are online on THIS page5?R[&px8d
$result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");
if(!($result)) {
print "Useronline Select Error > ";
} \.V0f;YPS6s0Z7A
//Count the number of rows = the number of people online
$user = mysql_num_rows($result);F"|T tq3A
//spit out the results
mysql_close();,wI{R*O)K+?.@:Q3s]
if($user == 1) {
print("1 user online\n");
} else {
print("$user users online\n");
}
?>$?7e/q d Pv
[url=http://www.now.cn/vhost/][img]http://b.todayisp.com/bbs/760x90h.gif[/img][/url],o'h'VO:L [+g~8UP
以上代码我是在时代互联提供的免费试用主机上测试的，感觉效果还不错，性能很稳定，不信的话你也可以去试试。当然，记得指出我这个程序中的不足先哦。Q:U:Tm.s4V#V:\"G5`
时代互联是行业内最早开始提供PHP 虚拟主机的公司之一，现在已经是的金牌域名注册商和中国互联网客户满意度十佳单位，产品功能已经非常完善，特别提一下几个特有用的功能：数据库自动备份、免费集成繁简通简装版、多域名绑定、多子网站支持、GCDN 网站加速器、镜像加速、高级访问统计系统、支持WAP、可选电信/网通/香港机房。(R$oV}]k8e+k^
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g] ^[ H5p
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D:vNG&_"\Qk xS
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][2n{!o;UyV
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！