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!-g AQ:@Z"rpNi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。$__ ERmK[is
首先我创建MYSQL数据库表。Mbo4RA2z
CREATE TABLE tablename ({4\s%? rY3SZ)aNE
field type(max_length) DEFAULT 'default_value' (NOT) NULLfY%y#vZ
}可以使用的SQL语句。
CREATE TABLE useronline (
timestamp int(15) DEFAULT '0' NOT NULL,
ip varchar(40) NOT NULL,3aGyz{1H
file varchar(100) NOT NULL,.|D5@"^,|2o#je,P
PRIMARY KEY (timestamp),
KEY ip (ip),
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
$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。
$timestamp = time();上面的完整代码:0hg6|)H3f-U
<?php
$server = "localhost"; //your server
$db_user = "root"; //your mysql database username SC!vEO)S;A
$db_pass = "password"; //your mysql database password if anyH/n(f \ n6m
$database = "users"; //the db name"f3j[(Y4r9] R'G
$timeoutseconds = 300;//timeoutseconds limit
//get the current timeD_Q&h_
$timestamp = time(); ~-wts6P
//calculate the lowest timestamp allowed
$timeout = $timestamp-$timeoutseconds;
?>连接mysqlwE2?q+@ceH w)r
mysql_connect('localhost', 'username', 'password');也允许使用变量形式。E'{l},mXTR
mysql_connect($server, $db_user, $db_pass);如果mysql数据库没有密码的话可以使用下面代码连接-B5i;sT)M;U#x2K0V;F
mysql_connect($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。-?dvG?ZR.P
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");'N x{)cb'FqMS/jRb/m
如果用户用错误信息的话,这样处理。j&PH A {%BR:v.n
if(!($insert)) {K%XD m,PFE
print "Useronline Insert Failed > ";
}然后实现当超过设置的时间就删除该用户记录。y$P8U @/FpGv
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");同样给出删除记录出错的处理。
if(!($delete)) {4~-y f:Te6\
print "Useronline Delete Failed > ";}GD[]M
}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
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。~0t6ei }L,u6~7Pg
if($user == 1) {
print("1 user online\n");6` L:^-pf#Z|e
} else { L0n ~:n [$T"_
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
$server = "localhost"; //normally localhostz1g"n%U },GH%yf
$db_user = "root"; //your MySQL database username
$db_pass = "password"; //your MySQL database password!TQ!m;c Ddt*Ok
$database = "users";O+YCa1^mqXr/UY's
$timeoutseconds = 300; //it will delete all people which haven't refreshed(so probbably are3^ v:D)G-_L#M9~
// offline or inactive) in $timieoutseconds time (so it actually checks the people that are active in the last6KAL5Ls1i^
// $timeoutseconds seconds)
//this is where PHP gets the time5v\-f ?/Ko0l K!?,|
$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 database Cr8LmU"iY6eq%lC(z
mysql_connect($server, $db_user);
//add the timestamp from the user to the online list)Ff*R9a,^(g
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");
if(!($insert)) {_s'G!aH1\*T2I
print "Useronline Insert Failed > ";a&rMx7Z'gS.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<$timeout");e~_4G#U-{e~
if(!($delete)) {
print "Useronline Delete Failed > ";7Hq!j%DL:b u
}