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。Welk~It
CREATE TABLE tablename (#u'Mdw)vG&kZ
field type(max_length) DEFAULT 'default_value' (NOT) NULL
}可以使用的SQL语句。D*pJH ZA`(mU e
CREATE TABLE useronline (
timestamp int(15) DEFAULT '0' NOT NULL,
ip varchar(40) NOT NULL,4zO#F-_:qf#K|
file varchar(100) NOT NULL,
PRIMARY KEY (timestamp), U5M2Aw#l!N'p:Hhz,i0I
KEY ip (ip),
KEY file (file)qv}l J6X~d
);下面我们是PHP脚本,首先我定义MYSQL的信息。h:Jk?2fV
$server = "localhost"; //你的服务器 uu5F s;f
$db_user = "root"; //你的mysql的用户名FT0~%{P%@ rI~
$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。OR*Q5pF2S#h
$timestamp = time();上面的完整代码:
<?php~rk}/OW Mf
$server = "localhost"; //your serverZ1O o,d7A T
$db_user = "root"; //your mysql database username
$db_pass = "password"; //your mysql database password if any$K\5?aJ&Z'F-y-B-v
$database = "users"; //the db nameH~TQmj/m
$timeoutseconds = 300;//timeoutseconds limit
//get the current time I}N ]:l.d?LgZ*_
$timestamp = time();
//calculate the lowest timestamp allowedT P-|J!V3Z2]&`!P
$timeout = $timestamp-$timeoutseconds;
?>连接mysqlS)Zx$U$`wQ-s}
mysql_connect('localhost', 'username', 'password');也允许使用变量形式。{S7[s#Co6l'[
mysql_connect($server, $db_user, $db_pass);如果mysql数据库没有密码的话可以使用下面代码连接 o)X\5|)O;u^
mysql_connect($server, $db_user);查询数据库的代码:}:p,YSS@/U?!{
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 VALUESZbA+K7sK L-LF
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");D;o/_#A'B&JS
如果用户用错误信息的话,这样处理。N eyW0[h.v4z%q4v
if(!($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。
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");同样给出删除记录出错的处理。
if(!($delete)) {r)Jfd ["na)~&jQX
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:tCv8AC|Ry Y
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($user == 1) {$eO)J/w|`n+Lj8~:t
print("1 user online\n");-zk;QiN O9|
} else {!g _ x~jH4C2Nh
print("$user users online\n");
}最终把上面代码写成一个PHP文件如下。bpLb k(G*e$tPG
<?phpd["LxU$r
//Put your basic server info hereztU+Qh
$server = "localhost"; //normally localhost
$db_user = "root"; //your MySQL database username`0gM3Hny
$db_pass = "password"; //your MySQL database passwordO2o-yP-W&w w+F
$database = "users";yL`,Fv
$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\2^oV-q!K
// $timeoutseconds seconds)bYT0~S'~-G
//this is where PHP gets the timemr7y'_%@
$timestamp = time();)O?;kHnf$\
//counts the timeout, all people which have been seen last online in earlier than this timestamp, will get removed
$timeout = $timestamp-$timeoutseconds;5s0Fn^3OMuQ
//connect to database
mysql_connect($server, $db_user);l:S8f&rAgW&U"n0Xl
//add the timestamp from the user to the online listwa$K(v^B0FI:_
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')"); _9_)ohuS3D
if(!($insert)) {
print "Useronline Insert Failed > ";
}3b5i5@ kTg
//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)) {#Ejsb4za _d!^%K
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='".$_SERVER['PHP_SELF']."' ");!N"D9w7H T
if(!($result)) {8YQ&Vgh}8x8NI
print "Useronline Select Error > ";
}9wF(x VB+M8Q
//Count the number of rows = the number of people online
$user = mysql_num_rows($result);
//spit out the results
mysql_close();
if($user == 1) {
print("1 user online\n");
} else {CUw\+[m/tU&Q5g
print("$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。
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。
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自己加QQ去问吧。
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