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！2@J1C3il?
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。#J^*N6s,T\
CREATE TABLE tablename (6jz#jb8C4n S0PorQ)}
field type(max_length) DEFAULT 'default_value' (NOT) NULLLQmWM
}可以使用的SQL语句。
CREATE TABLE useronline (&K~#v q1T-w+w
timestamp int(15) DEFAULT '0' NOT NULL,
ip varchar(40) NOT NULL,
file varchar(100) NOT NULL,_\5i$p"K'O-i
PRIMARY KEY (timestamp),$z1["g]1A#L?/l-o
KEY ip (ip),6x)R7?h1t7je
KEY file (file)
);下面我们是PHP脚本，首先我定义MYSQL的信息。W ocl @
$server = "localhost"; //你的服务器
$db_user = "root"; //你的mysql的用户名
$db_pass = "password"; //你的mysql的密码%G+XR,pXo Co9g
$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。C9L)L-a YmBJ4Z
$timestamp = time();上面的完整代码：
<?php]T[S3y!fP
$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 limitTJ'xl2@*T)s
//get the current time/~8[){b'q8o;h
$timestamp = time();YhO,s"Wz{H6W
//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。
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：4J3nw|&x4M_
mysql_db_query('database', 'query');我们只要有访客就要增加一条记录。)TJQ2k5x&J&\uC#a
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");7bc \ Dr ~Yr;ha
如果用户用错误信息的话，这样处理。
if(!($insert)) {
print "Useronline Insert Failed > "; w7F.Ckk-z!]6`,}&^h?
}然后实现当超过设置的时间就删除该用户记录。r\$ADX"Yu2n8[^
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");同样给出删除记录出错的处理。
if(!($delete)) {
print "Useronline Delete Failed > ";b^:mC4?3m5bam
}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。
$user = mysql_num_rows($result);最后关闭数据库。
mysql_close();显示在线的人数。
if($user == 1) {3@1u8J ~Vq&m/P
print("1 user online\n");?CZuz G*c(m`
} else {sQ3C$BLC9~!R!w7k
print("$user users online\n");S2ea6tt\3{5@
}最终把上面代码写成一个PHP文件如下。Vw;Qz,I
<?phpEj*Qe:{7Ig
//Put your basic server info here5WLEkI~
$server = "localhost"; //normally localhost
$db_user = "root"; //your MySQL database usernameB4}O-Xg^C
$db_pass = "password"; //your MySQL database password
$database = "users";WDM(Qr8gCY`du u
$timeoutseconds = 300; //it will delete all people which haven't refreshed(so probbably are6aFG&MN9a
// offline or inactive) in $timieoutseconds time (so it actually checks the people that are active in the last
// $timeoutseconds seconds)
//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_V5E,e(@
$timeout = $timestamp-$timeoutseconds;
//connect to database
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.p3NQkD1v
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");
if(!($delete)) {q/aAF0}:|
print "Useronline Delete Failed > "; yG3P5S]#~5]"H-B"c$X`
}
//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)) {4|4gML@
print "Useronline Select Error > ";$aB2G-F6GE3Gh-w
}
//Count the number of rows = the number of people online
$user = mysql_num_rows($result);NJQi nf(@|5y!k
//spit out the results+[~,RLW+w
mysql_close();
if($user == 1) {2T$Q:O:e6D)M(Z2q
print("1 user online\n");] C/^U5mnn!?
} else {%b uFSC4|
print("$user users online\n");
}1`1h(TA^g
?>
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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。
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。B/Y0^.uo
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。*_l8Uyc9m
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1`H3de!iR2K
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4H2w+H Vo,{,`
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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。

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刚用PHP写了一个网站在线人数的程序，请大家进来指点下！