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！-a L5Y.Hu
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。:r&Z#\xJN
CREATE TABLE tablename ( h'L:lo+v5x
field type(max_length) DEFAULT 'default_value' (NOT) NULL
}可以使用的SQL语句。
CREATE TABLE useronline (6L/H%M'?k0?,s2Fn
timestamp int(15) DEFAULT '0' NOT NULL,fbnP3lA
ip varchar(40) NOT NULL,
file varchar(100) NOT NULL,'Y[ l0h*XYBy @
PRIMARY KEY (timestamp),
KEY ip (ip),;O}LZIMR9yL
KEY file (file)
);下面我们是PHP脚本，首先我定义MYSQL的信息。
$server = "localhost"; //你的服务器
$db_user = "root"; //你的mysql的用户名0x0Y7JU3}_$\
$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。
$timestamp = time();上面的完整代码：
<?phpx0M6R1lvSS^
$server = "localhost"; //your serverwC7i"k$ml
$db_user = "root"; //your mysql database username s1ds&m5|%q0J]P
$db_pass = "password"; //your mysql database password if any
$database = "users"; //the db name
$timeoutseconds = 300;//timeoutseconds limit
//get the current time
$timestamp = time();3uF^3z9fpN9C\
//calculate the lowest timestamp allowed
$timeout = $timestamp-$timeoutseconds;
?>连接mysql%F{g4F7^^c)~M
mysql_connect('localhost', 'username', 'password');也允许使用变量形式。(fF leLI
mysql_connect($server, $db_user, $db_pass);如果mysql数据库没有密码的话可以使用下面代码连接fmC"DO;d~.|'p6X
mysql_connect($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。1KD5ss{M.e&K
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES1s+G-~'NyA.^
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");
如果用户用错误信息的话，这样处理。Ww4|8R$F$F
if(!($insert)) {-~ kU?2g*Y'\"A/D
print "Useronline Insert Failed > ";
}然后实现当超过设置的时间就删除该用户记录。2E1a-k0ULa2m%`9}3f
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");同样给出删除记录出错的处理。8@n)[NPD B)l2_
if(!($delete)) {(o#z/kgy8qCc%SR
print "Useronline Delete Failed > ";cQ(O.SaG#r.y)j
}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 l7kG1{*mOq
mysql_num_rows(query);来统计用户，代码如下。X6z,Lc0`6e-\!f^p
$user = mysql_num_rows($result);最后关闭数据库。y,|J ]2dVQ@
mysql_close();显示在线的人数。
if($user == 1) {uD4y }Z
print("1 user online\n");J f&z7qU5zf2ya
} else {tk n)x!rv`-\&VX
print("$user users online\n");
}最终把上面代码写成一个PHP文件如下。`~8G,z@
<?php
//Put your basic server info here
$server = "localhost"; //normally localhost:|!CAEqx
$db_user = "root"; //your MySQL database username
$db_pass = "password"; //your MySQL database password9?&FxdYT
$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
// $timeoutseconds seconds)t~6CVEc%U4fx
//this is where PHP gets the timeRh$?^ ucr
$timestamp = time();
//counts the timeout, all people which have been seen last online in earlier than this timestamp, will get removed;K3z+\5F)Rb
$timeout = $timestamp-$timeoutseconds;6dr sh(\/d%^H
//connect to databaseLv T`HU6J:zp
mysql_connect($server, $db_user);
//add the timestamp from the user to the online listB)_g4{2Ywm&O}7Qj+?
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");
if(!($insert)) {At+p(@!~d
print "Useronline Insert Failed > ";AHb@Mz-E\b
}
//delete the peoples which haven't been online/active in the last $timeoutseconds seconds. o!z:C+az6\e"[9k_(o
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");:k,C9H5X"H n{
if(!($delete)) {~P:]-y7Z'x
print "Useronline Delete Failed > ";
}uX3AA-H/F(L5G9b#P
//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='".$_SERVER['PHP_SELF']."' ");7t['W$A/N8A
if(!($result)) {#cD6zd/?/?m MU
print "Useronline Select Error > ";
}
//Count the number of rows = the number of people online
$user = mysql_num_rows($result);
//spit out the resultsW;| hwc%x:Urq
mysql_close();
if($user == 1) { `!WV#Wy:}
print("1 user online\n");
} else {?+z$Y@7|?9{
print("$user users online\n");3}Z8Mw)HsA
}hP6TVQX
?>(`)C7o Yt-yVMm$I,AU(B
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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。ko|(}Km"ylIt'v\
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。~;o_ @`"jM#~
当然啦，这两款主机也是相当不错的。!?/Cn,h#Bv
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1z8X{/m&`9g"f.`
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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！