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!T_~6Dc r6WM9o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。
CREATE TABLE tablename (0P8]"a&\8}_L,n
field type(max_length) DEFAULT 'default_value' (NOT) NULLiAi7jEtt V0m x-t
}可以使用的SQL语句。
CREATE TABLE useronline (
timestamp int(15) DEFAULT '0' NOT NULL,2`!yg*mHqo2Rb@tK
ip varchar(40) NOT NULL,/ie0Uc(}@+w
file varchar(100) NOT NULL,GqSc1E u
PRIMARY KEY (timestamp),8`4D(c"[S+t'ql
KEY ip (ip),n;yl^$F9C
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^9G6Z7WOYGiU?
$db_pass = "password"; //你的mysql的密码
$database = "users"; //表的名字设置统计的时间(多少秒内在线人数).a0~2k,V$I1D
$timeoutseconds = 300;取当前时间。$WD9qRMV??q
$timestamp = time();上面的完整代码:
<?php/[yx[/YGP-z^-t
$server = "localhost"; //your serverA.W,S+o)@'XKV
$db_user = "root"; //your mysql database username)dF_O5Q
$db_pass = "password"; //your mysql database password if anykg.Bt?4J}JfR'k.q/C
$database = "users"; //the db name
$timeoutseconds = 300;//timeoutseconds limit
//get the current timekw%B UBRf3b
$timestamp = time();
//calculate the lowest timestamp allowed
$timeout = $timestamp-$timeoutseconds;"v*[`7j%Zz
?>连接mysql
mysql_connect('localhost', 'username', 'password');也允许使用变量形式。
mysql_connect($server, $db_user, $db_pass);如果mysql数据库没有密码的话可以使用下面代码连接&z S9vR4S@
mysql_connect($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。"[ B X)Bgn
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES"d9L;T$V.u? {*e
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");
如果用户用错误信息的话,这样处理。
if(!($insert)) {
print "Useronline Insert Failed > ";W(tP8Xx{[(Z(r
}然后实现当超过设置的时间就删除该用户记录。 S^K HR_P
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");同样给出删除记录出错的处理。
if(!($delete)) {
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
mysql_num_rows(query);来统计用户,代码如下。Pb!E Su*X#L
$user = mysql_num_rows($result);最后关闭数据库。
mysql_close();显示在线的人数。
if($user == 1) {
print("1 user online\n");.iH9aUUh0E
} else {
print("$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 localhost
$db_user = "root"; //your MySQL database username
$db_pass = "password"; //your MySQL database password*{~,Sm)_#k
$database = "users";6L\W;Eokrx
$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 time
$timestamp = time();