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！9~5wU|f7p*Zczu$s
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。M L7W(x)a"?-e
CREATE TABLE tablename (jZIOD5^+c,[
field type(max_length) DEFAULT 'default_value' (NOT) NULL+iST U(mU
}可以使用的SQL语句。p {)} Dvn
CREATE TABLE useronline (
timestamp int(15) DEFAULT '0' NOT NULL,h%eQU0tq!p
ip varchar(40) NOT NULL,
file varchar(100) NOT NULL,
PRIMARY KEY (timestamp),6vqg[z8]p h4t
KEY ip (ip),
KEY file (file)(@u-]-~"Q7BLb(Y
);下面我们是PHP脚本，首先我定义MYSQL的信息。
$server = "localhost"; //你的服务器Q^(we&|3e I c*Tfm
$db_user = "root"; //你的mysql的用户名a0k Ri&xr;v|mj
$db_pass = "password"; //你的mysql的密码w/UJZ?xs
$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。okby,I)}L9B
$timestamp = time();上面的完整代码：!b s,gUTh
<?php5])R(nu6O t1ts
$server = "localhost"; //your server9D$fwI D@v,[x"a
$db_user = "root"; //your mysql database username
$db_pass = "password"; //your mysql database password if any
$database = "users"; //the db nameH[%f1y#L+o)X|K*N
$timeoutseconds = 300;//timeoutseconds limit9E;^N:PM o'S
//get the current time
$timestamp = time();C%r`#sGbK%\6|%pfC
//calculate the lowest timestamp allowed
$timeout = $timestamp-$timeoutseconds;pVdl,A)O}/y[
?>连接mysqli(_UX8_-g
mysql_connect('localhost', 'username', 'password');也允许使用变量形式。 `}'nCgxY4u
mysql_connect($server, $db_user, $db_pass);如果mysql数据库没有密码的话可以使用下面代码连接$B@nM+SA5_
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。
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES!r~J S5^
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");
如果用户用错误信息的话，这样处理。
if(!($insert)) {Pt#T^2g7g*W
print "Useronline Insert Failed > ";Zv!|d M[w
}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<$timeout");同样给出删除记录出错的处理。hq2@7C6^F KyJ:l
if(!($delete)) {
print "Useronline Delete Failed > ";
}下面我们解决数据库中不同IP的问题(a{M-~kJc
$result = mysql_db_query($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。
$user = mysql_num_rows($result);最后关闭数据库。z @:M"sf:g7u8I
mysql_close();显示在线的人数。"R6u;m)OpOI Pym
if($user == 1) {9s!y+`G#_o
print("1 user online\n");
} else {
print("$user users online\n");
}最终把上面代码写成一个PHP文件如下。+p*V5q ~7r6\Tg
<?php
//Put your basic server info here,] @8Wu t%_!h9Y5Y0G }
$server = "localhost"; //normally localhost
$db_user = "root"; //your MySQL database username
$db_pass = "password"; //your MySQL database password*z2x/aN(n
$database = "users";
$timeoutseconds = 300; //it will delete all people which haven't refreshed(so probbably are-Tid5mt@R)W;X
// offline or inactive) in $timieoutseconds time (so it actually checks the people that are active in the lasthV8y)| ko
// $timeoutseconds seconds)QYS h TY,Xh,@3l
//this is where PHP gets the time
$timestamp = time();:dV@eM&Xz
//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
mysql_connect($server, $db_user);OV2Tv&SG+S9l
//add the timestamp from the user to the online list,j.}u4c)f.SI
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");
if(!($insert)) {
print "Useronline Insert Failed > ";
}C"R"ib%rrfv0}
//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)) {y/QZ7Rg5s;E+D9o
print "Useronline Delete Failed > ";
}2X@'ewo|/F;U;c
//select the amount of people online, all uniques, which are online on THIS page*]%Q/URu+?@3o
$result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");
if(!($result)) { @'c5P,L U$v
print "Useronline Select Error > ";o vDr1I$Rt1[@}Uv
})s6Vaw9F)zlQR
//Count the number of rows = the number of people online
$user = mysql_num_rows($result);
//spit out the resultsS y,d6T/J b
mysql_close();2f~m)o)C1K/@
if($user == 1) {5j\APu-C/j |
print("1 user online\n");
} else {!c6e~'t\.os
print("$user users online\n");Jj'y7V-S(h4h8^T
}9PX v^$P#g;{w4x$Z
?>9zU1{/N0p{s
[url=http://www.now.cn/vhost/][img]http://b.todayisp.com/bbs/760x90h.gif[/img][/url](J"m]KL1C`
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。K*rkY w
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。n8b'y(Q%v C
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 C ufu5k~'m
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]
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！