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! \Ba X6p2W"B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。-ZN![V&I5{W&C%A:|
首先我创建MYSQL数据库表。
CREATE TABLE tablename (
field type(max_length) DEFAULT 'default_value' (NOT) NULL
}可以使用的SQL语句。
CREATE TABLE useronline ( h'IB+_H*^"[
timestamp int(15) DEFAULT '0' NOT NULL,
ip varchar(40) NOT NULL,
file varchar(100) NOT NULL,!~#e!?"E ~/mp J
PRIMARY KEY (timestamp),
KEY ip (ip),
KEY file (file)8Qk+aB;L8}N)`D
);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0RuAL{SHl
$db_pass = "password"; //你的mysql的密码l6W8Ijm(r
$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。F `,R)K'`*Wrsos w
$timestamp = time();上面的完整代码:e0y:tl/C
<?php
$server = "localhost"; //your server
$db_user = "root"; //your mysql database usernameA*e$`9UJ5iW
$db_pass = "password"; //your mysql database password if anyR_g`2br!H
$database = "users"; //the db name
$timeoutseconds = 300;//timeoutseconds limitK1S#e9rYb3F
//get the current timeSSM0V)k,v g'~N
$timestamp = time();d#ZE4t*[$Wmq$w
//calculate the lowest timestamp allowedC uIt$aSqK-`.V @
$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, $db_pass);如果mysql数据库没有密码的话可以使用下面代码连接o r4Xt1y-M5]3qh6h
mysql_connect($server, $db_user);查询数据库的代码:\.mrD$sTVkiV6C
mysql_db_query('database', 'query');我们只要有访客就要增加一条记录。5B W ?QA8`+t
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");
如果用户用错误信息的话,这样处理。
if(!($insert)) {6q%CYb7wJ6cq7O
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<$timeout");同样给出删除记录出错的处理。 E2TMh.j)P1Y/vn0y
if(!($delete)) {NR X*e,p/ryc
print "Useronline Delete Failed > ";~"J a3i!LC.tq
}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y^nj4@L8\_
mysql_num_rows(query);来统计用户,代码如下。*C+o"?%a`2cW
$user = mysql_num_rows($result);最后关闭数据库。
mysql_close();显示在线的人数。
if($user == 1) {
print("1 user online\n");
} else {5C*k&Y!ft j#og
print("$user users online\n");
}最终把上面代码写成一个PHP文件如下。
<?php
//Put your basic server info here ` _X$O1w
$server = "localhost"; //normally localhost
$db_user = "root"; //your MySQL database username
$db_pass = "password"; //your MySQL database password
$database = "users";m6PJ'DQF Ew
$timeoutseconds = 300; //it will delete all people which haven't refreshed(so probbably areE+[X`#lV
// offline or inactive) in $timieoutseconds time (so it actually checks the people that are active in the lastfD&|]|1B
// $timeoutseconds seconds)
//this is where PHP gets the time4u&[%~%p\w5[Y
$timestamp = time();
//counts the timeout, all people which have been seen last online in earlier than this timestamp, will get removed)~8Mr:u5n:@
$timeout = $timestamp-$timeoutseconds;
//connect to database
mysql_connect($server, $db_user);3HL M8S~,F
//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']."')");