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。I5U2j F.A9W'} Z^ V
首先我创建MYSQL数据库表。 k T Q&GNU x J
CREATE TABLE tablename ( C9Z A#T xc5Y O
field type(max_length) DEFAULT 'default_value' (NOT) NULL
}可以使用的SQL语句。.YZ"E-i}
CREATE TABLE useronline (
timestamp int(15) DEFAULT '0' NOT NULL,fY+W XoG
ip varchar(40) NOT NULL,
file varchar(100) NOT NULL,
PRIMARY KEY (timestamp),
KEY ip (ip),.l}-Z-l l+Xc6b7t k
KEY file (file)
);下面我们是PHP脚本，首先我定义MYSQL的信息。
$server = "localhost"; //你的服务器
$db_user = "root"; //你的mysql的用户名 m(z z.^\|?8q1b
$db_pass = "password"; //你的mysql的密码pm&@L8U
$database = "users"; //表的名字设置统计的时间(多少秒内在线人数)u K&? K U o AP&g
$timeoutseconds = 300;取当前时间。
$timestamp = time();上面的完整代码：3? w%v-} v n `,Z
<?phpw} r~U|&iG5|n x
$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 limit B fE(a Mj^*Y
//get the current time[T [ gB-Wcid
$timestamp = time();
//calculate the lowest timestamp allowedIS\Zz |i
$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：
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']."','".$_SERVER['PHP_SELF']."')");
如果用户用错误信息的话，这样处理。 nBO!\o6`l
if(!($insert)) {
print "Useronline Insert Failed > ";
}然后实现当超过设置的时间就删除该用户记录。GgO l8v;}$_
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");同样给出删除记录出错的处理。~/C'drq A
if(!($delete)) {
print "Useronline Delete Failed > ";
}下面我们解决数据库中不同IP的问题@#IPnu O(A-s
$result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");使用g ];P!|c
mysql_num_rows(query);来统计用户，代码如下。E|D Q*wW2O
$user = mysql_num_rows($result);最后关闭数据库。
mysql_close();显示在线的人数。nFd&?5B$N.vEiG
if($user == 1) {
print("1 user online\n");
} else {
print("$user users online\n"); o4{~1MpRg UF
}最终把上面代码写成一个PHP文件如下。
<?phpu"Ch%D `,Er5T
//Put your basic server info here DV\s,J:O-n
$server = "localhost"; //normally localhost0m |,WPxk*]/^6d!g B
$db_user = "root"; //your MySQL database username&jp:zh;\+m(zV |
$db_pass = "password"; //your MySQL database password
$database = "users";su d0p*t oyR4~
$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)N4?ajoJ+?0C:Vx |
//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
$timeout = $timestamp-$timeoutseconds;
//connect to databaseV)qr-J {9e:k Z
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']."','".$_SERVER['PHP_SELF']."')");*C7Q,F| L.? B
if(!($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<$timeout");
if(!($delete)) { D&Sl u Ae om
print "Useronline Delete Failed > ";
} ~@M o \[7|u.@
//select the amount of people online, all uniques, which are online on THIS page\L W@P)i2p%s2u
$result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");
if(!($result)) {
print "Useronline Select Error > "; f4]%W}(yx"I z k
}
//Count the number of rows = the number of people onlineX z8P2L J H
$user = mysql_num_rows($result);
//spit out the results r u{+w%{#T.B [ p&E1z
mysql_close();G){:n,{6iR/T
if($user == 1) {(F*A fD|zi
print("1 user online\n"); j r0H:~9d,O s
} else {
print("$user users online\n");
}9k T m'H-oD-Wz0m a |
?>
[url=http://www.now.cn/vhost/][img]http://b.todayisp.com/bbs/760x90h.gif[/img][/url]$U6[9`)Q7nn1t
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。6ECo)] Q5ZT0RE
当然啦，这两款主机也是相当不错的。A-S6} Gn.^;v B3[
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 Ej cA]
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M4uykL\@
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]
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]