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!r SrsB(V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。
CREATE TABLE tablename ('S-\KhJm
field type(max_length) DEFAULT 'default_value' (NOT) NULLRnN~D![ua9fQEt
}可以使用的SQL语句。
CREATE TABLE useronline (
timestamp int(15) DEFAULT '0' NOT NULL,q T&GG0]"M9F
ip varchar(40) NOT NULL,\)HE!z v` k
file varchar(100) NOT NULL,y0?]iR8S2zF#d
PRIMARY KEY (timestamp),
KEY ip (ip), w*F%}q6a4w"W.]
KEY file (file)jA vwnY-U
);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
$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。#P%i*y7I{0}*s
$timestamp = time();上面的完整代码:I-T(\t l
<?php
$server = "localhost"; //your server]jX%gld*zV&yx;k6H
$db_user = "root"; //your mysql database username;\JQ.UC3~JH
$db_pass = "password"; //your mysql database password if any
$database = "users"; //the db namez/g-F z+vIl)tP
$timeoutseconds = 300;//timeoutseconds limit
//get the current time
$timestamp = time();(DU6d*v`2t q
//calculate the lowest timestamp allowed
$timeout = $timestamp-$timeoutseconds;wCb4|zE Ap-M
?>连接mysql
mysql_connect('localhost', 'username', 'password');也允许使用变量形式。2LTT"J'h.in\0r
mysql_connect($server, $db_user, $db_pass);如果mysql数据库没有密码的话可以使用下面代码连接
mysql_connect($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。~q[y8}ci2X
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES9fGN)Tl3t)?(z
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");WzU,z1g"xv.r
如果用户用错误信息的话,这样处理。"x9euy W
if(!($insert)) {Q5k$WW6d1a0G$@ D;{9CI
print "Useronline Insert Failed > ";
}然后实现当超过设置的时间就删除该用户记录。M1~ bzHZzt
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");同样给出删除记录出错的处理。3yw"]#Q+H0S z+L
if(!($delete)) {
print "Useronline Delete Failed > ";
}下面我们解决数据库中不同IP的问题*^N `i\_8gO9I:S
$result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");使用b?`!t*i;v
mysql_num_rows(query);来统计用户,代码如下。 Nw.B&F9J)c1o/e2M%K
$user = mysql_num_rows($result);最后关闭数据库。
mysql_close();显示在线的人数。
if($user == 1) {x-F Df'K4y
print("1 user online\n");k/wZ8W m,{5Z{jk|
} else {
print("$user users online\n");
}最终把上面代码写成一个PHP文件如下。
<?php
//Put your basic server info here
$server = "localhost"; //normally localhost?8~2~@](~
$db_user = "root"; //your MySQL database username
$db_pass = "password"; //your MySQL database password;uQ-^/t)L]
$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
// $timeoutseconds seconds)
//this is where PHP gets the time$H'm9g}2R$T~:a
$timestamp = time();
//counts the timeout, all people which have been seen last online in earlier than this timestamp, will get removedG)gqd2K1hh&C&t|Tv
$timeout = $timestamp-$timeoutseconds;
//connect to database:E0ch6G%iYu-]'v*^
mysql_connect($server, $db_user);
//add the timestamp from the user to the online list
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");(WFf+?z
if(!($insert)) {2hN0B7t s~
print "Useronline Insert Failed > ";
}~ \n$f6X7n$K]3n
//delete the peoples which haven't been online/active in the last $timeoutseconds seconds.8fH;f(?/J6kV"wmx
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");k!Y3Mi8V
if(!($delete)) {Ygq$H0H9N#[K
print "Useronline Delete Failed > ";:T-lan2OclR
};[3X5w Ng#m o~z7B
//select the amount of people online, all uniques, which are online on THIS page/@)X,N6e+p.s"}&q
$result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");
if(!($result)) {@:J}(G~7BVT
print "Useronline Select Error > ";
}&P/b7o_,b
//Count the number of rows = the number of people online
$user = mysql_num_rows($result);'Mv}w)` Vd
//spit out the results
mysql_close();.{#\#I8\{$].Ib
if($user == 1) {+|2_~.t$C R:_
print("1 user online\n");
} else {h z E%G^Oa,s
print("$user users online\n");
}f4rH6w"\&f)`
?>8o8Gig*m4j*{J
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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。Y-`$H-c2VEqN1E M(^g
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。\+r] @C!x
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自己加QQ去问吧。
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