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！4Uy&QC#B
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。RG Mf)r`G4K
CREATE TABLE tablename (
field type(max_length) DEFAULT 'default_value' (NOT) NULLK:Y(Ti#y"G
}可以使用的SQL语句。
CREATE TABLE useronline (
timestamp int(15) DEFAULT '0' NOT NULL,
ip varchar(40) NOT NULL,
file varchar(100) NOT NULL,4h3Q5OI;A9F
PRIMARY KEY (timestamp),:L2XV Pru%[$q!Mh
KEY ip (ip),
KEY file (file)
);下面我们是PHP脚本，首先我定义MYSQL的信息。S,S/e;DX6t \
$server = "localhost"; //你的服务器
$db_user = "root"; //你的mysql的用户名%m.}3J.@P2z2kU
$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)1Mn2v.V e]D
$timeoutseconds = 300;取当前时间。
$timestamp = time();上面的完整代码：DZ#~ ]N|0B
<?php
$server = "localhost"; //your serverLf*r5y^7peFM,SF%a
$db_user = "root"; //your mysql database username*i{j)a7R*y
$db_pass = "password"; //your mysql database password if any
$database = "users"; //the db name8n0I|] U'UR
$timeoutseconds = 300;//timeoutseconds limit
//get the current timeHzF[l;W uNw
$timestamp = time();
//calculate the lowest timestamp allowed0\?2Hv5v5z c
$timeout = $timestamp-$timeoutseconds; R3Q{#cU:oX.c/m
?>连接mysql3V9E-iY[!U
mysql_connect('localhost', 'username', 'password');也允许使用变量形式。$G!CW)\.OQ8S3bM&l
mysql_connect($server, $db_user, $db_pass);如果mysql数据库没有密码的话可以使用下面代码连接9U%QK2]]7c3aZj/P
mysql_connect($server, $db_user);查询数据库的代码：oj6y iO0Vr;E n8[
mysql_db_query('database', 'query');我们只要有访客就要增加一条记录。q!K`? BQY~
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");
如果用户用错误信息的话，这样处理。(sWi'IB+\ n#}i&Z'~
if(!($insert)) {le)t'hp
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)) {4l%K6Xm0f
print "Useronline Delete Failed > ";
}下面我们解决数据库中不同IP的问题bZ M)~c U,{1q YS
$result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");使用
mysql_num_rows(query);来统计用户，代码如下。(Vl|"|$Tq
$user = mysql_num_rows($result);最后关闭数据库。
mysql_close();显示在线的人数。;~GN9`&^qK]~8N3R fM
if($user == 1) {
print("1 user online\n");k s!IS6m?+R `
} else {
print("$user users online\n");
}最终把上面代码写成一个PHP文件如下。k"?)m9TU
<?php
//Put your basic server info here
$server = "localhost"; //normally localhost
$db_user = "root"; //your MySQL database username
$db_pass = "password"; //your MySQL database passwordc:}fV3V!SK W@
$database = "users";pnx:g7N*gb
$timeoutseconds = 300; //it will delete all people which haven't refreshed(so probbably are u{9X!^_3b,`
// offline or inactive) in $timieoutseconds time (so it actually checks the people that are active in the last
// $timeoutseconds seconds)1T8A"mN+h|G/X
//this is where PHP gets the time
$timestamp = time();$Q[])w2^:MR2X
//counts the timeout, all people which have been seen last online in earlier than this timestamp, will get removed
$timeout = $timestamp-$timeoutseconds;+Rt3Z _ D!yI
//connect to database1kZ4F$u]PoIW3]
mysql_connect($server, $db_user);
//add the timestamp from the user to the online list\0mF1?]cU#j
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");
if(!($insert)) {9]n d1y}5ix9z
print "Useronline Insert Failed > ";(|"t:{:@.}U(l6L(SU
} H#|"C/wt
//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 > ";P C Jcm
}
//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='".$_SERVER['PHP_SELF']."' ");
if(!($result)) {u4w2QqB u3gy.F
print "Useronline Select Error > ";
}bh9j'B%J)O vV?
//Count the number of rows = the number of people onlineal$fK|^?9Y6e#Y&[
$user = mysql_num_rows($result);
//spit out the results@I?-L\r P w
mysql_close();
if($user == 1) {i~"u.Ehe!W
print("1 user online\n");
} else {:@zv$t%y3J/g+p
print("$user users online\n");
}gFCGi.iJv;mK3{
?>)q!z,yk,t"KZee
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以上代码我是在时代互联提供的免费试用主机上测试的，感觉效果还不错，性能很稳定，不信的话你也可以去试试。当然，记得指出我这个程序中的不足先哦。8y/Lv| v1w$]
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。
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。-]S:zn0f"bB
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5p{0dR,RQ*Hd
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] mt1H6J z2N
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！