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。fy|3o#r]
CREATE TABLE tablename (d-R4OQ1|&`Q
field type(max_length) DEFAULT 'default_value' (NOT) NULL
}可以使用的SQL语句。IV6Y'tO5y
CREATE TABLE useronline (
timestamp int(15) DEFAULT '0' NOT NULL,
ip varchar(40) NOT NULL,0Hl+y-UE%AjL
file varchar(100) NOT NULL,
PRIMARY KEY (timestamp),
KEY ip (ip),
KEY file (file)1qEFW8q ^Z
);下面我们是PHP脚本，首先我定义MYSQL的信息。
$server = "localhost"; //你的服务器#sI a,U+_DEa
$db_user = "root"; //你的mysql的用户名W,IJ A$h#J3U7q
$db_pass = "password"; //你的mysql的密码+Q:oT#^3] o
$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。
$timestamp = time();上面的完整代码：.KO4th*f*yrI
<?php ^X4Q&bX$k,E'l
$server = "localhost"; //your serverVGc"[CS,O-^
$db_user = "root"; //your mysql database username"S`gK.[
$db_pass = "password"; //your mysql database password if any
$database = "users"; //the db namet+INe0qZ
$timeoutseconds = 300;//timeoutseconds limit6S^;] e ]:q
//get the current time6`Jy)i r
$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。
mysql_connect($server, $db_user, $db_pass);如果mysql数据库没有密码的话可以使用下面代码连接ZI:g5d$m!Z-H
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 VALUESwgf!?Xz-j$x)@
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");#N~%R1ki/Ce.t$y.qH
如果用户用错误信息的话，这样处理。4W F0rF8R cyve
if(!($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。%?*\_e vR
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");同样给出删除记录出错的处理。
if(!($delete)) {T5J9l.L#_ Q
print "Useronline Delete Failed > ";
}下面我们解决数据库中不同IP的问题.O A/R,VQ!?~
$result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");使用 W/D&p,dZ
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。DN-{L0Fl
mysql_close();显示在线的人数。 F0a+Vu/W
if($user == 1) {}"z`W m/M
print("1 user online\n");~'x H%fq"d
} else {c)}/i,KUI
print("$user users online\n");
}最终把上面代码写成一个PHP文件如下。1~-aP)~$_;P!p2@
<?php
//Put your basic server info here&Mo1DI} f,h.AB
$server = "localhost"; //normally localhost
$db_user = "root"; //your MySQL database username-}]7[k{/v9H%C
$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
// $timeoutseconds seconds)
//this is where PHP gets the timecP?!j.y;G&R)L dW
$timestamp = time();
//counts the timeout, all people which have been seen last online in earlier than this timestamp, will get removed
$timeout = $timestamp-$timeoutseconds;E:K1?xf5ge"g3q?j
//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&Dc5jh lXp/}Q@#@y
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");Vx.|f$xQ
if(!($insert)) {
print "Useronline Insert Failed > ";$O:?*~l[b:l
}
//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)) {&gp8xC(A(a
print "Useronline Delete Failed > ";
}nZ}~u$f+VD8sN
//select the amount of people online, all uniques, which are online on THIS pageCZ9wZs@
$result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");
if(!($result)) {
print "Useronline Select Error > ";
}
//Count the number of rows = the number of people online
$user = mysql_num_rows($result);L)wD#O3b)X7l'C
//spit out the results
mysql_close();"eR&v/VD
if($user == 1) {
print("1 user online\n");
} else {
print("$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。 ^?0Bd+FEk,PIH
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。@F+v4xc.}%c,WTeLo
当然啦，这两款主机也是相当不错的。s!aR:uF"g
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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！