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！% A( \6 H/ J5 G( F6 }9 B# M7 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。) y( q3 U$ u( u7 n1 F# K
首先我创建MYSQL数据库表。0 a7 e8 j/ A9 v
CREATE TABLE tablename ($ n5 e" K. C2 M# |* V  \# Y% H
field type(max_length) DEFAULT 'default_value' (NOT) NULL( y% \9 @9 r5 {' ^7 }$ {
}可以使用的SQL语句。4 I  S- t$ ^) R( G8 d' t
CREATE TABLE useronline (
timestamp int(15) DEFAULT '0' NOT NULL,
ip varchar(40) NOT NULL,
file varchar(100) NOT NULL,
PRIMARY KEY (timestamp),
KEY ip (ip),
KEY file (file)$ T4 z5 ^9 p  i, i" v! t2 j  f
);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: _( }3 T# q* Z" y% v9 k8 X* u
$db_pass = "password"; //你的mysql的密码( Q( k3 Y! C  E' [  i/ A4 t
$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。* h! W5 b. F; ]  {1 R( ^
$timestamp = time();上面的完整代码：
<?php
$server = "localhost"; //your server9 ]5 H( L5 @6 u2 z. i8 y" I' Z
$db_user = "root"; //your mysql database username& f+ N7 k, L: Z. e" Q1 g, {
$db_pass = "password"; //your mysql database password if any
$database = "users"; //the db name; `7 W3 b; E3 n# l- P& a7 f" U* l
$timeoutseconds = 300;//timeoutseconds limit# h2 X6 E5 ]' x+ P0 z# q
//get the current time% C! p$ a$ A1 l$ e; Z* f) N4 `
$timestamp = time();1 }8 j8 e- y# f& q2 K+ @3 g
//calculate the lowest timestamp allowed
$timeout = $timestamp-$timeoutseconds;$ H( B" Q5 Q9 Q% r/ P3 }# q0 x
?>连接mysql1 y* j. a1 y; |! p; {- x8 F
mysql_connect('localhost', 'username', 'password');也允许使用变量形式。! }5 ~7 q+ E( p4 V
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：2 `1 e4 a2 ?& ?
mysql_db_query('database', 'query');我们只要有访客就要增加一条记录。. c7 Q% h1 Y  M( J) g3 V8 I) ?
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES3 w8 I" ^9 z' M" q! f
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");
如果用户用错误信息的话，这样处理。8 ]! c) J. V8 d' E9 a
if(!($insert)) {5 G. r3 ^' t! Z- i
print "Useronline Insert Failed > ";* Q9 P, e& b! h4 p
}然后实现当超过设置的时间就删除该用户记录。  t; V  p) |/ {' I$ y' T7 A
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");同样给出删除记录出错的处理。; @% j9 a  P  b$ O. P/ d/ L
if(!($delete)) {6 w3 v9 Y. W; g( H6 |3 N
print "Useronline Delete Failed > ";9 Y) G. @9 S. O4 [
}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
mysql_num_rows(query);来统计用户，代码如下。" Z1 G+ N# |4 ^1 o2 m6 B, I
$user = mysql_num_rows($result);最后关闭数据库。
mysql_close();显示在线的人数。
if($user == 1) {
print("1 user online\n");. x: _, J. A2 O2 V4 @# J: o9 a( T
} else {
print("$user users online\n");
}最终把上面代码写成一个PHP文件如下。/ t& Z3 X7 v& q! G
<?php" Y; T5 ?% d* h+ @1 U, t+ G
//Put your basic server info here
$server = "localhost"; //normally localhost
$db_user = "root"; //your MySQL database username
$db_pass = "password"; //your MySQL database password+ r- a7 c! V- x
$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 last9 C  N+ N' X4 e' K% r
// $timeoutseconds seconds), n; u9 C8 k$ g. M& s1 G
//this is where PHP gets the time
$timestamp = time();
//counts the timeout, all people which have been seen last online in earlier than this timestamp, will get removed! X# s) d, Y9 b2 ~3 N+ {
$timeout = $timestamp-$timeoutseconds;' r* K- w2 g4 n- b; K# s+ y0 u
//connect to database  t9 x- f1 H: L' ~% 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']."','".$_SERVER['PHP_SELF']."')");
if(!($insert)) {
print "Useronline Insert Failed > ";
}; T0 O, A, T1 p
//delete the peoples which haven't been online/active in the last $timeoutseconds seconds.% m; |: K* \$ ~
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");
if(!($delete)) {
print "Useronline Delete Failed > ";
}/ H& _" p1 ^* H8 v" ~9 m
//select the amount of people online, all uniques, which are online on THIS page% j7 @9 K. H; f- N7 N4 {2 ~  n
$result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");
if(!($result)) {
print "Useronline Select Error > ";
}
//Count the number of rows = the number of people online
$user = mysql_num_rows($result);0 j7 L* w. B4 w
//spit out the results4 s. B4 K- I8 T0 {/ J) Q
mysql_close();1 n. Y% F" D3 K( U/ w) |5 z) q* F' P: G
if($user == 1) {$ R$ W3 }0 V$ \6 ?( X) H0 ^* G
print("1 user online\n");: d+ h( u1 X. O' p  L
} else {% M  {8 |3 p& Z
print("$user users online\n");2 e, O% B# S& {, y1 E
}
?>+ z, ]* B! R- G; l6 P& k

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。. U- P# b% z7 \% b
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。( d, U) ?, D- `; k  e
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。  H/ L1 E; J( }. @$ Q& _  g7 M/ y1 p
当然啦，这两款主机也是相当不错的。
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; V- a6 ]# U$ E+ `0 Q2 P
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]