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！-Q5]z-Dn
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。k4p:e-hW9qD$N3R3R
CREATE TABLE tablename (
field type(max_length) DEFAULT 'default_value' (NOT) NULL
}可以使用的SQL语句。5T-]#v.]yc{Z
CREATE TABLE useronline (:ep mCW,_
timestamp int(15) DEFAULT '0' NOT NULL,x4u$GY'boNN8@z2\
ip varchar(40) NOT NULL,
file varchar(100) NOT NULL,
PRIMARY KEY (timestamp),
KEY ip (ip),.gdB%b4j3aZMTM;A|j
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
$db_pass = "password"; //你的mysql的密码3L)Dwg'W$H$x&b'r
$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。dn2?.cU Z9f
$timestamp = time();上面的完整代码：^cN9w%J%[!S
<?php}w#w.J*U-};z
$server = "localhost"; //your server
$db_user = "root"; //your mysql database username
$db_pass = "password"; //your mysql database password if any
$database = "users"; //the db name$M;@8C}L'k%HWr
$timeoutseconds = 300;//timeoutseconds limit
//get the current time)~#@ u-E#@Qe
$timestamp = time();/g2W ^y(A'R`[9ax
//calculate the lowest timestamp allowed @_fXN\ CpBk
$timeout = $timestamp-$timeoutseconds;"VkG+u@6{-v
?>连接mysql
mysql_connect('localhost', 'username', 'password');也允许使用变量形式。
mysql_connect($server, $db_user, $db_pass);如果mysql数据库没有密码的话可以使用下面代码连接ai0i8\&A1\2yo
mysql_connect($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
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");
如果用户用错误信息的话，这样处理。
if(!($insert)) {
print "Useronline Insert Failed > ";6w1Bfk-D
}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)) {I|[Mw5A4M&j
print "Useronline Delete Failed > ";-Irj$r Z 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j|.W'|S
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。;_tP_#Js$y
mysql_close();显示在线的人数。
if($user == 1) {C(`5W]R(wa
print("1 user online\n");)K0vK0Ki7|B~gN
} else {7R\B2}f:q
print("$user users online\n");
}最终把上面代码写成一个PHP文件如下。
<?phpU!W"J-S$\0Ht
//Put your basic server info here
$server = "localhost"; //normally localhost
$db_user = "root"; //your MySQL database username3~ E5ttc }5f5f\
$db_pass = "password"; //your MySQL database password
$database = "users";
$timeoutseconds = 300; //it will delete all people which haven't refreshed(so probbably are eUPtU;oB&o5j:C[
// offline or inactive) in $timieoutseconds time (so it actually checks the people that are active in the last
// $timeoutseconds seconds)Rf!O9k{ `p%O%~ g
//this is where PHP gets the time N Y Yv%w,tO{
$timestamp = time();4nK$aLX3ab%j/D
//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-U kk/qEM
mysql_connect($server, $db_user);
//add the timestamp from the user to the online list
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES7]mu[ |
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");
if(!($insert)) {:SN0a.c&WpZc
print "Useronline Insert Failed > ";_ KD _k\:D
}
//delete the peoples which haven't been online/active in the last $timeoutseconds seconds.Dj czN|5{j4c
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");
if(!($delete)) {
print "Useronline Delete Failed > ";
}d/x OU/`C$K)dy"n
//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)) {NU%q\#lU*l\ PB
print "Useronline Select Error > ";
};QaOo,y}v
//Count the number of rows = the number of people online
$user = mysql_num_rows($result);!JEV6oMx
//spit out the results
mysql_close();
if($user == 1) {:Ln!Kp*_$f5O5t
print("1 user online\n");
} else {1R2VL!C~L_a?
print("$user users online\n");+z;[H Y[
}
?>
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以上代码我是在时代互联提供的免费试用主机上测试的，感觉效果还不错，性能很稳定，不信的话你也可以去试试。当然，记得指出我这个程序中的不足先哦。!IkBy4E&~3bv
时代互联是行业内最早开始提供PHP 虚拟主机的公司之一，现在已经是的金牌域名注册商和中国互联网客户满意度十佳单位，产品功能已经非常完善，特别提一下几个特有用的功能：数据库自动备份、免费集成繁简通简装版、多域名绑定、多子网站支持、GCDN 网站加速器、镜像加速、高级访问统计系统、支持WAP、可选电信/网通/香港机房。
我之前建站的时候选的是他们公司标准商务E型，因为这款机型还特别支持ASP.NET3.5(3.0/2.0/1.1)/ASP。
当然啦，这两款主机也是相当不错的。5V4c~']'Un.y$_
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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！