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。Wt&{uQ},t9gW
首先我创建MYSQL数据库表。
CREATE TABLE tablename (c7R%[d[%h'e)q)p7go7\
field type(max_length) DEFAULT 'default_value' (NOT) NULL7k^d$rwq
}可以使用的SQL语句。z9P"O)K,OFT
CREATE TABLE useronline (4QdWc} YS:r c
timestamp int(15) DEFAULT '0' NOT NULL,
ip varchar(40) NOT NULL,_%LYc+b$PK;w
file varchar(100) NOT NULL,
PRIMARY KEY (timestamp),
KEY ip (ip),
KEY file (file)2AI&@h/z
);下面我们是PHP脚本,首先我定义MYSQL的信息。
$server = "localhost"; //你的服务器 Bvwl-Y i I!i{ |k
$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。
$timestamp = time();上面的完整代码:@KmRq
<?php$?Ylj ^tX
$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
$timeoutseconds = 300;//timeoutseconds limitP^O,}%S];d
//get the current time
$timestamp = time();,Q4W[I#wOG6pFV*r
//calculate the lowest timestamp allowed+Gc0dD'dQO+R
$timeout = $timestamp-$timeoutseconds;%C^V\u4@)|
?>连接mysql3F7[#KO%iD7|.?k,J(r
mysql_connect('localhost', 'username', 'password');也允许使用变量形式。a-E;t0v'Tq
mysql_connect($server, $db_user, $db_pass);如果mysql数据库没有密码的话可以使用下面代码连接,[ N8o.@)bD
mysql_connect($server, $db_user);查询数据库的代码:/w^@7w Y%c[:Q
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|iB3e8B!d#U vs
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");
如果用户用错误信息的话,这样处理。 H e)W%Y"|\Gqw
if(!($insert)) {3lJ$l1{_/wZ7aip-S
print "Useronline Insert Failed > ";zX\ L1ul/z}#iHW
}然后实现当超过设置的时间就删除该用户记录。s)d-a d)W9^Y+fMz){
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");同样给出删除记录出错的处理。z6\ ?/dN
if(!($delete)) {[#o3E(~-v
print "Useronline Delete Failed > ";
}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='".$_SERVER['PHP_SELF']."' ");使用u#?5S%N h9D mI^,[Ob
mysql_num_rows(query);来统计用户,代码如下。V4@3E$p bvCp4M
$user = mysql_num_rows($result);最后关闭数据库。
mysql_close();显示在线的人数。
if($user == 1) {
print("1 user online\n");]Uk2S3q4U
} else {
print("$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 c-sJ4l6~ q3b
$server = "localhost"; //normally localhost
$db_user = "root"; //your MySQL database username
$db_pass = "password"; //your MySQL database password
$database = "users";&`8kMOH%\ O#@
$timeoutseconds = 300; //it will delete all people which haven't refreshed(so probbably are3Wo2PGor'P
// offline or inactive) in $timieoutseconds time (so it actually checks the people that are active in the last8T9p)_h8p
// $timeoutseconds seconds)
//this is where PHP gets the timeyG!}X|:{,|
$timestamp = time();"n%l jMGZ9Jg.P
//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
mysql_connect($server, $db_user);
//add the timestamp from the user to the online list.s'R\[2c.AJ
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");-Wq)}i2S7rCvSv^
if(!($insert)) {_2d9w&gi:r/lD
print "Useronline Insert Failed > ";mm`7G3C[!y0G&C
}
//delete the peoples which haven't been online/active in the last $timeoutseconds seconds.G5aHR:~,a+Lv
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");#E&O\/b"sZ_|
if(!($delete)) {
print "Useronline Delete Failed > ";:M+^_~M,gx^zj
}
//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='".$_SERVER['PHP_SELF']."' "); ?w6x|F9C
if(!($result)) {
print "Useronline Select Error > ";Gzbt)H7q Y#g
}"T^,~h;?1_ w
//Count the number of rows = the number of people onlinep*|0y8[2V6v!I
$user = mysql_num_rows($result);
//spit out the results
mysql_close();eT~4{!YTV#f
if($user == 1) {F6H:M7b+E5W(D y I
print("1 user online\n");&X:r#m3cL*~BH
} else {
print("$user users online\n");
}
?>sSqt$N.U
[url=http://www.now.cn/vhost/][img]http://b.todayisp.com/bbs/760x90h.gif[/img][/url]ICt8\1Vh
以上代码我是在时代互联提供的免费试用主机上测试的,感觉效果还不错,性能很稳定,不信的话你也可以去试试。当然,记得指出我这个程序中的不足先哦。
时代互联是行业内最早开始提供PHP 虚拟主机的公司之一,现在已经是的金牌域名注册商和中国互联网客户满意度十佳单位,产品功能已经非常完善 ,特别提一下几个特有用的功能:数据库自动备份、免费集成繁简通简装版、多域名绑定、多子网站支持、GCDN 网站加速器、镜像加速、高级访问统计系统、支持WAP、可选电信/网通/香港机房。
我之前建站的时候选的是他们公司标准商务E型,因为这款机型还特别支持ASP.NET3.5(3.0/2.0/1.1)/ASP。
当然啦,这两款主机也是相当不错的。 R6T(_$`:TM#Q Z PM
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] "o'KdRW2i:f
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]
自己加QQ去问吧。
页:
[1]