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。k4|zJ DwX
CREATE TABLE tablename (
field type(max_length) DEFAULT 'default_value' (NOT) NULL/J"sY2g v*v r4n|_
}可以使用的SQL语句。a&h;c5c!l#v3TK^0W
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)
);下面我们是PHP脚本，首先我定义MYSQL的信息。qy4m:K@;` }!R
$server = "localhost"; //你的服务器_uU1UAi3G2`
$db_user = "root"; //你的mysql的用户名
$db_pass = "password"; //你的mysql的密码8M)V:n0g$`0L7w
$database = "users"; //表的名字设置统计的时间(多少秒内在线人数)
$timeoutseconds = 300;取当前时间。$do{,y6wrR
$timestamp = time();上面的完整代码：
<?php2K@-xu }#o
$server = "localhost"; //your server
$db_user = "root"; //your mysql database username
$db_pass = "password"; //your mysql database password if any5s[tN.UWJj
$database = "users"; //the db name
$timeoutseconds = 300;//timeoutseconds limit
//get the current time,Ni.]2^.cU
$timestamp = time();2q,Z0V*l*QZr
//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：)U8U,anc
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
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");lzyhMa;s
如果用户用错误信息的话，这样处理。
if(!($insert)) {_1goPeR~kR
print "Useronline Insert Failed > ";
}然后实现当超过设置的时间就删除该用户记录。+A/NT-tz {4MB2X6J
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");同样给出删除记录出错的处理。z+d%['CwNJ6Ch
if(!($delete)) {
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1E!O-h[G-e'r4p Vr
mysql_num_rows(query);来统计用户，代码如下。+Q0Z7I4?-A
$user = mysql_num_rows($result);最后关闭数据库。 X^-NVQ5c'p
mysql_close();显示在线的人数。
if($user == 1) {$z&F/F7?H \
print("1 user online\n");
} else {
print("$user users online\n");
}最终把上面代码写成一个PHP文件如下。
<?php R1O3O9q&k_
//Put your basic server info hereWyjD;l$u4Hl ~;~
$server = "localhost"; //normally localhost s]8i~7~8zO%z Wm
$db_user = "root"; //your MySQL database username? kAGp$V._.|)n
$db_pass = "password"; //your MySQL database password
$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 last&M"e{de6R8]+tr)U
// $timeoutseconds seconds)3r[n~;n` {L}uo%e
//this is where PHP gets the time&u?%n(SLD2eG
$timestamp = time();$m+?9q$W{9CT$|
//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&k:?j8Jd_Y"V
mysql_connect($server, $db_user);1cyoU.Y.h5_ C
//add the timestamp from the user to the online list0p"`O+Uh4o? ?
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");
if(!($insert)) {
print "Useronline Insert Failed > ";
}0liC8E0XL$l
//delete the peoples which haven't been online/active in the last $timeoutseconds seconds.)Lou4tVo
$delete = mysql_db_query($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='".$_SERVER['PHP_SELF']."' ");-L2?/kM#~!M
if(!($result)) {#dis oX"{A
print "Useronline Select Error > ";
}
//Count the number of rows = the number of people online2l D,khP4k
$user = mysql_num_rows($result);h5M(J7wo!Q n},i1ur
//spit out the results
mysql_close();
if($user == 1) {5H&|f%{G)|
print("1 user online\n");;eu$o8d5i.}7V(]vJW8ZD
} else {
print("$user users online\n");5i RN7YQGbV(EH hM
}
?>cWN;f"w[^0}$P%Dp
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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。7BF,N8? Z(B'j
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。
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*F8z"U7s'jVX
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*i'OiZH2VZ|
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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！