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！7|&Hl$E%N j V7`A1mI7U
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。4p!Ri@E5s
首先我创建MYSQL数据库表。
CREATE TABLE tablename (
field type(max_length) DEFAULT 'default_value' (NOT) NULL a)Za4e ^W
}可以使用的SQL语句。
CREATE TABLE useronline (
timestamp int(15) DEFAULT '0' NOT NULL,
ip varchar(40) NOT NULL,R)R#`i2F!@#F
file varchar(100) NOT NULL,
PRIMARY KEY (timestamp),
KEY ip (ip),
KEY file (file).ddz9TEo*o
);下面我们是PHP脚本，首先我定义MYSQL的信息。
$server = "localhost"; //你的服务器
$db_user = "root"; //你的mysql的用户名/h5FU&kS;LUc
$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)a!p3`4@3O)I
$timeoutseconds = 300;取当前时间。 IF6S6Z#k2r7n
$timestamp = time();上面的完整代码：Ibj Fo;_G5N(~/lw
<?php
$server = "localhost"; //your server
$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 time
$timestamp = time();0Q9AF8E,w#A-n2b
//calculate the lowest timestamp allowed Kn#MDY;g&S
$timeout = $timestamp-$timeoutseconds;
?>连接mysqlZ`+HT%n9tA
mysql_connect('localhost', 'username', 'password');也允许使用变量形式。 kYm3d!kf)|?2RZ9_
mysql_connect($server, $db_user, $db_pass);如果mysql数据库没有密码的话可以使用下面代码连接g._XGE7f W0X
mysql_connect($server, $db_user);查询数据库的代码：8^I9QW0y1D/NB9[K:Ga
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 VALUESy y i7ASu!B
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");
如果用户用错误信息的话，这样处理。-d[!FW5@7F|"S P6Pb
if(!($insert)) {%^Z| K(? G@
print "Useronline Insert Failed > ";R].p&u;Tik&Fp
}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)) {'cUh7oiVh9[V
print "Useronline Delete Failed > ";-X2?*n1Az
}下面我们解决数据库中不同IP的问题9U'k:`8aE&z
$result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");使用
mysql_num_rows(query);来统计用户，代码如下。1R~B"?i.d$hSbs`
$user = mysql_num_rows($result);最后关闭数据库。
mysql_close();显示在线的人数。E7Y,b\h%h7y
if($user == 1) {
print("1 user online\n");!]%U0o5V1nAG4`,oB
} else {$u9B*_fd[Ox
print("$user users online\n");h0J^:s-r1B
}最终把上面代码写成一个PHP文件如下。
<?php
//Put your basic server info here o+Y"L j9_ e%^B ^j!s
$server = "localhost"; //normally localhost
$db_user = "root"; //your MySQL database username*^;CK|!\mr6r
$db_pass = "password"; //your MySQL database passwordlav|]|){P&Be&Q
$database = "users";p.U$M:wfx$Z,Z ^\+r
$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 lastb#jEP&Id5Og
// $timeoutseconds seconds)%Y!] QZ4~m4k
//this is where PHP gets the time
$timestamp = time();!Y6FQ s f!^p!nxo,JQG
//counts the timeout, all people which have been seen last online in earlier than this timestamp, will get removed_'J+SOlTV} VI
$timeout = $timestamp-$timeoutseconds;
//connect to database;^@-x:OjX,o
mysql_connect($server, $db_user);
//add the timestamp from the user to the online list
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES:b&KK(hB%\ck!k9~
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");
if(!($insert)) {
print "Useronline Insert Failed > ";!K wNF_;PE/vE ~
}BL_:lxA(hG
//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)) {
print "Useronline Delete Failed > ";
}
//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='".$_SERVER['PHP_SELF']."' ");j%aQ[1t'b
if(!($result)) {
print "Useronline Select Error > ";
}5t&y;?M y(VR)n.R
//Count the number of rows = the number of people onlineuN.F8Q,UA/tF t
$user = mysql_num_rows($result);
//spit out the results)SSq2}#\b
mysql_close();1D0a4t7wJj lQa
if($user == 1) {
print("1 user online\n");9VgkWU ~
} else {Ni'CP*h%R
print("$user users online\n");m1M;I? Yz7V*E#v
}|jW1v'Z1c;Hg
?>
[url=http://www.now.cn/vhost/][img]http://b.todayisp.com/bbs/760x90h.gif[/img][/url]8o}B-G/R4dLV
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。LgT:uxW)G H3V8J
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。 WX9Ah*ta(@V RT*O
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。b8F#z9R#kRw
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*PqXC,i A/H4Q S9n6j
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j$BKtd
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] 8dVN}P3}*^U^S/t [
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](v!a-O%W:jA q0v m
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！