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！
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 (7Dl c V0TA
field type(max_length) DEFAULT 'default_value' (NOT) NULLT%zAw0q5J3GN"@
}可以使用的SQL语句。4fW%k.t2j/G&f
CREATE TABLE useronline (
timestamp int(15) DEFAULT '0' NOT NULL,X/R|&md(Z:{ C
ip varchar(40) NOT NULL,fy4H.Z"I.}
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。7P_$ZDv0y(j K8u/jd
$server = "localhost"; //你的服务器4X%^{v;ha UuVN
$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)CFhO!mx
$timeoutseconds = 300;取当前时间。
$timestamp = time();上面的完整代码：
<?php
$server = "localhost"; //your serverXLJ3qb5?
$db_user = "root"; //your mysql database username/wawLkiJ(w2f9F+S[/R
$db_pass = "password"; //your mysql database password if any
$database = "users"; //the db name0`;R+~]0~
$timeoutseconds = 300;//timeoutseconds limit
//get the current time
$timestamp = time();0G7ctK!A,PqJi5g1P
//calculate the lowest timestamp allowed
$timeout = $timestamp-$timeoutseconds;l'U%Ip7Px!M7[
?>连接mysqlj8|n@*I'_+T
mysql_connect('localhost', 'username', 'password');也允许使用变量形式。
mysql_connect($server, $db_user, $db_pass);如果mysql数据库没有密码的话可以使用下面代码连接
mysql_connect($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。qa(xB KAq?i\/f
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES|oOm U
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");}jg6E,UV%uQ0a.M
如果用户用错误信息的话，这样处理。
if(!($insert)) {}6C/z MaXDF
print "Useronline Insert Failed > ";
}然后实现当超过设置的时间就删除该用户记录。D3X@7{#?hJ6b
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");同样给出删除记录出错的处理。p"l_H(f)t
if(!($delete)) {
print "Useronline Delete Failed > ";
}下面我们解决数据库中不同IP的问题#nF3Ge3}
$result = mysql_db_query($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。lbaTm7}~ C5NUb
$user = mysql_num_rows($result);最后关闭数据库。+? TXK!h
mysql_close();显示在线的人数。?P{lm~%Q^t
if($user == 1) {
print("1 user online\n");!RoJ*nPtm
} else {
print("$user users online\n");
}最终把上面代码写成一个PHP文件如下。s)au!f5~V,I@ome
<?php9CA:dIjU:u+O l
//Put your basic server info here4Y*f#zw4[aT Z
$server = "localhost"; //normally localhosta@R-sk8]vX
$db_user = "root"; //your MySQL database username
$db_pass = "password"; //your MySQL database password9a"l/x ?OaA&H4D;h
$database = "users";nqy@/s5k~
$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)V i^&xE.W^2p
//this is where PHP gets the time
$timestamp = time();p$|"j4bFUd
//counts the timeout, all people which have been seen last online in earlier than this timestamp, will get removed
$timeout = $timestamp-$timeoutseconds;Es]U}I9LJ
//connect to databasef x(K+c&O;{[7^,C0k&f)iC
mysql_connect($server, $db_user);#x']e+yTE-Eb,W ZP
//add the timestamp from the user to the online list
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES|p.L K({1k |j+QP
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");
if(!($insert)) {$dS4v!BG B bU&d8{9C
print "Useronline Insert Failed > ";
}Gf p7un;~)d9q
//delete the peoples which haven't been online/active in the last $timeoutseconds seconds.B^Ym~ q"O6qW1n1VD
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");
if(!($delete)) {
print "Useronline Delete Failed > ";
}
//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)) {/F$A:}8H0|5m4P)X
print "Useronline Select Error > ";7YW.Z*]'Q;w9zN
})JSja6NtD;YY
//Count the number of rows = the number of people onlineZ8F};|aC
$user = mysql_num_rows($result);!Ob*mz/R2z
//spit out the results5C7}@H'e,z|?
mysql_close();
if($user == 1) {p\x djSl
print("1 user online\n");
} else { @z;o+Q)g-SP-SJ
print("$user users online\n");`$Bad"I PI
}
?>K,Kw'^Gl,L2s
[url=http://www.now.cn/vhost/][img]http://b.todayisp.com/bbs/760x90h.gif[/img][/url]}8\m3U P"ul
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。Z3]q*Y.q/{`,u7s
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。j|Ni}Wq
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
提供一下这个公司的联系方式：请见：[url=http://www.now.cn/vhost/]http://www.now.cn/vhost/[/url] \@:_dI/n B
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 [url=http://www.now.cn/callcenter/call.net?LineName=55]http://www.now.cn/callcenter/call.net?LineName=55[/url]S8v{`n4@ o
自己加QQ去问吧。

页: [1]

捌玖网络工作室's Archiver

刚用PHP写了一个网站在线人数的程序，请大家进来指点下！