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!3]4X~E8? I0BL_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。i8`&SK0N[
首先我创建MYSQL数据库表。
CREATE TABLE tablename (
field type(max_length) DEFAULT 'default_value' (NOT) NULL@6N9}D#xm0\
}可以使用的SQL语句。{6G*Z[T1yw
CREATE TABLE useronline (Q)}-G,w0W:X|t)Z%[
timestamp int(15) DEFAULT '0' NOT NULL,
ip varchar(40) NOT NULL,
file varchar(100) NOT NULL,9X Q5oM@s:j
PRIMARY KEY (timestamp),
KEY ip (ip),
KEY file (file)*R9kL8e(w
);下面我们是PHP脚本,首先我定义MYSQL的信息。aR/QSfHR1ncJ \
$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w'k4N1LW`f/i
$database = "users"; //表的名字设置统计的时间(多少秒内在线人数)0W*t;R/q*DUE
$timeoutseconds = 300;取当前时间。
$timestamp = time();上面的完整代码:
<?php
$server = "localhost"; //your serverY!v6K;rf:{-D\
$db_user = "root"; //your mysql database username
$db_pass = "password"; //your mysql database password if any
$database = "users"; //the db name v&HP BjG7Q%mrH
$timeoutseconds = 300;//timeoutseconds limitQ0BI2UKIiX?"K
//get the current time
$timestamp = time();q*k?t3\B1X
//calculate the lowest timestamp allowed/?$v:}+|r l
$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:1s Xt'd0wj(Y}a1Zi
mysql_db_query('database', 'query');我们只要有访客就要增加一条记录。^ qA`z]"A{5d2}k
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");] Lh;_0l$Gr
如果用户用错误信息的话,这样处理。
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<$timeout");同样给出删除记录出错的处理。/}9n:rR S/Y
if(!($delete)) {[D1S Ed1f"e
print "Useronline Delete Failed > ";
}下面我们解决数据库中不同IP的问题]cydI
$result = mysql_db_query($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。2\0V rDa@6r
$user = mysql_num_rows($result);最后关闭数据库。
mysql_close();显示在线的人数。
if($user == 1) {OK}/xoq,q3GH
print("1 user online\n");P#Hk2i!X7e{*MS
} else {\&l4i]!U+B'e
print("$user users online\n");#z.Dgy @!h,g
}最终把上面代码写成一个PHP文件如下。;@y*C.n5yb#P4A
<?php
//Put your basic server info here
$server = "localhost"; //normally localhost
$db_user = "root"; //your MySQL database username$|J `W2gMp*{'a^
$db_pass = "password"; //your MySQL database password
$database = "users";jN.j`g*{f#N:G
$timeoutseconds = 300; //it will delete all people which haven't refreshed(so probbably are1w"K,i-qM
// offline or inactive) in $timieoutseconds time (so it actually checks the people that are active in the last0lZ-OEyM(J
// $timeoutseconds seconds)-e VX7MYE!Uh
//this is where PHP gets the timePZN R N3TC
$timestamp = time();k7kO1t4Y,GtG:UJ
//counts the timeout, all people which have been seen last online in earlier than this timestamp, will get removed
$timeout = $timestamp-$timeoutseconds;,C9s,G+BdWT
//connect to database
mysql_connect($server, $db_user);!gLJ h1J,`7f
//add the timestamp from the user to the online list