刚用PHP写了一个网站在线人数的程序，请大家进来指点下！

主机, 虚拟主机

刚用PHP写了一个网站在线人数的程序，请大家进来指点下！
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。- a0 W/ b+ b( @% m+ y; E
首先我创建MYSQL数据库表。
CREATE TABLE tablename (; E8 }  E" ~( x/ }
field type(max_length) DEFAULT 'default_value' (NOT) NULL1 y0 l: y0 k& p4 m" A# X
}可以使用的SQL语句。& V4 P9 s$ O+ `
CREATE TABLE useronline (
timestamp int(15) DEFAULT '0' NOT NULL,
ip varchar(40) NOT NULL,. T7 d" A; Z" w/ T2 l
file varchar(100) NOT NULL,
PRIMARY KEY (timestamp),
KEY ip (ip),
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/ i* }: Y+ g" N& G4 Y/ r
$db_user = "root"; //你的mysql的用户名& H$ ~6 Q; m$ [7 `5 Y) R
$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)  l/ n. P2 b# s
$timeoutseconds = 300;取当前时间。' s" x- b) F1 j" w: D9 M- m
$timestamp = time();上面的完整代码：) e) |8 i2 A3 W$ j! J" d4 ~$ R
<?php/ m, u! C; i) ?3 f/ G: l% u9 e) j
$server = "localhost"; //your server. U. ^, T, ^) G- ]
$db_user = "root"; //your mysql database username/ z. e" Y- I6 {. D" e+ b/ D. n
$db_pass = "password"; //your mysql database password if any: D7 E9 D: C( z5 {
$database = "users"; //the db name
$timeoutseconds = 300;//timeoutseconds limit! f8 d6 Y/ h9 r* f, W* [
//get the current time! m" @, ?( e( i8 W# w0 u! |9 l3 \
$timestamp = time();
//calculate the lowest timestamp allowed- i6 @+ {' L" _, `0 b7 e6 P* f- n
$timeout = $timestamp-$timeoutseconds;
?>连接mysql
mysql_connect('localhost', 'username', 'password');也允许使用变量形式。, |) T  I$ A# c4 M
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：. {+ P2 ?) N# A, p9 ]7 E2 f5 v/ ~" \
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# `$ Z, u) `3 S( t
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");+ _- M) X6 k/ q6 }* e: f0 d- p
如果用户用错误信息的话，这样处理。
if(!($insert)) {. c  v( d9 y, K- O
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<$timeout");同样给出删除记录出错的处理。, Y4 b4 \" U9 I" L! h9 [8 ~
if(!($delete)) {
print "Useronline Delete Failed > ";. m2 W0 }+ T  A8 p* F/ q
}下面我们解决数据库中不同IP的问题( ^: a4 L0 l+ A8 t. }- n) M% u
$result = mysql_db_query($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。, U9 q2 \' u& T. p
$user = mysql_num_rows($result);最后关闭数据库。
mysql_close();显示在线的人数。7 G! _8 @& b0 c, f( E& d" w
if($user == 1) {' K6 U4 w$ X; u4 a( V& D% i& k
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。
<?php
//Put your basic server info here* O4 @: [# X) x: u- C  I. d
$server = "localhost"; //normally localhost
$db_user = "root"; //your MySQL database username
$db_pass = "password"; //your MySQL database password
$database = "users";7 c# r9 {( S' m  T7 I& O& o1 ]
$timeoutseconds = 300; //it will delete all people which haven't refreshed(so probbably are9 c$ L5 x+ Q8 O( b4 l
// offline or inactive) in $timieoutseconds time (so it actually checks the people that are active in the last! J1 _) ^4 y: l  ?. g& j
// $timeoutseconds seconds)
//this is where PHP gets the time; |+ t; n5 X0 C  g+ f
$timestamp = time();4 z( C. r: e( |
//counts the timeout, all people which have been seen last online in earlier than this timestamp, will get removed6 A; }3 h0 X8 w" m$ P. R
$timeout = $timestamp-$timeoutseconds;0 U; l9 A# s1 Z4 V) A. a
//connect to database
mysql_connect($server, $db_user);
//add the timestamp from the user to the online list/ P$ A7 x( c- u! K; m( c4 x
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES% i3 t; j2 h7 ?1 T1 L
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");
if(!($insert)) {" V& d2 Q; g3 f! B
print "Useronline Insert Failed > ";* d: Y  R; k* c
}* m; t3 n! x. F) W
//delete the peoples which haven't been online/active in the last $timeoutseconds seconds.5 |( L/ ^. W( z5 Z, K$ p
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");* B7 X) b/ [7 l( m/ ]* n. M$ f
if(!($delete)) {" p1 n- P8 T+ V3 l3 R% \- o
print "Useronline Delete Failed > ";
}# V/ _( q- K& x0 r4 x8 v, M0 S
//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)) {
print "Useronline Select Error > ";
}( c; U/ q& {+ |$ E
//Count the number of rows = the number of people online- r  a7 e( a  F0 d9 C
$user = mysql_num_rows($result);  g! A) P$ V" b$ \4 [
//spit out the results
mysql_close();
if($user == 1) {' [, M6 s  f% @
print("1 user online\n");
} else {( b! m* ^* K6 p- z! O
print("$user users online\n");$ Z9 q, Y9 Q/ H3 k
}5 |, p0 b  r+ T2 X! F- `1 x. L. }  o$ d
?>

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。
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。, D3 c5 @# C! e0 v
当然啦，这两款主机也是相当不错的。- W u5 Q2 F5 l
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
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5 I! I+ s. k4 g* j' Z
提供一下这个公司的联系方式：请见：http://www.now.cn/vhost/
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 http://www.now.cn/callcenter/call.net?LineName=55
自己加QQ去问吧。

返回列表

刚用PHP写了一个网站在线人数的程序，请大家进来指点下！

[收藏此主题] [关注此主题的新回复]

[通过 QQ、MSN 分享给朋友]