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 (
field type(max_length) DEFAULT 'default_value' (NOT) NULL9Fv(|(g!c?i5@ `
}可以使用的SQL语句。#va~o:L Y-f
CREATE TABLE useronline (
timestamp int(15) DEFAULT '0' NOT NULL,
ip varchar(40) NOT NULL,
file varchar(100) NOT NULL,)uI2kH1[!d%u@rfV
PRIMARY KEY (timestamp),:qY9B#ps7t;u
KEY ip (ip),
KEY file (file)4F*K0Gg~ l ue
);下面我们是PHP脚本,首先我定义MYSQL的信息。
$server = "localhost"; //你的服务器v&V/Mxp_QI
$db_user = "root"; //你的mysql的用户名k^aX0Bg6L
$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:X,t i-gbD3g
<?php
$server = "localhost"; //your serveri0c)e-P*l
$db_user = "root"; //your mysql database username
$db_pass = "password"; //your mysql database password if any
$database = "users"; //the db name
$timeoutseconds = 300;//timeoutseconds limit/ql,f @ ['SWRS#f
//get the current time
$timestamp = time();
//calculate the lowest timestamp allowed
$timeout = $timestamp-$timeoutseconds;
?>连接mysql
mysql_connect('localhost', 'username', 'password');也允许使用变量形式。'PV/Q6Jc?9gz S
mysql_connect($server, $db_user, $db_pass);如果mysql数据库没有密码的话可以使用下面代码连接I-Un)Hnq1a
mysql_connect($server, $db_user);查询数据库的代码:#~ M+n[5Uw2c
mysql_db_query('database', 'query');我们只要有访客就要增加一条记录。`/Fc9CW}Ei
$insert = mysql_db_query($database, "INSERT INTO useronline VALUESHr nj1rI'_ b,M
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");
如果用户用错误信息的话,这样处理。.W A c!sa
if(!($insert)) {"k9T;Z yu[
print "Useronline Insert Failed > ";
}然后实现当超过设置的时间就删除该用户记录。WR]V2Z zd ?
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");同样给出删除记录出错的处理。VUU6M?r*smj
if(!($delete)) {
print "Useronline Delete Failed > ";`BWl-b
}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。XC!G5\)K7wX#^o x
$user = mysql_num_rows($result);最后关闭数据库。
mysql_close();显示在线的人数。 Ze7Hl"i@Z;d,|y
if($user == 1) {u(NA2A.s J'w
print("1 user online\n");9c'ab7{3t
} else {
print("$user users online\n");
}最终把上面代码写成一个PHP文件如下。 DP7YC[9IW6Q
<?phpv{P,Acmm
//Put your basic server info here+jV[:v%AX+jB9M!M#C6n2u
$server = "localhost"; //normally localhostbEK%SNnr qn
$db_user = "root"; //your MySQL database username h:GN$R8^q V
$db_pass = "password"; //your MySQL database password~ v+ON:c
$database = "users";,^W6]'j/{9o%V!Pv
$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 last8Alv{TiM
// $timeoutseconds seconds)
//this is where PHP gets the timezRR'bez g8wzx
$timestamp = time();f.W yZ`
//counts the timeout, all people which have been seen last online in earlier than this timestamp, will get removedZ#ei0bLi
$timeout = $timestamp-$timeoutseconds;{V dQ8k%Y6e-B
//connect to database.y,cik1zO
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 > ";
}
//delete the peoples which haven't been online/active in the last $timeoutseconds seconds.
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");HT&r(mH:Eo2R
if(!($delete)) {1_:ImzAt3g,s
print "Useronline Delete Failed > ";$X[i{!wiAH U
}
//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='".$_SERVER['PHP_SELF']."' ");|zpq1\
if(!($result)) {
print "Useronline Select Error > ";X4Qv9]{Xz U%a7G
}
//Count the number of rows = the number of people online
$user = mysql_num_rows($result);
//spit out the results+v,`"a?y"G
mysql_close();
if($user == 1) {;P+Gx@ dG;|.Woe
print("1 user online\n");
} else {
print("$user users online\n");
}
?>
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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。-u:Qlv-~Ui W
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。\4K#l5|rH K
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自己加QQ去问吧。
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