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。
CREATE TABLE tablename ( [8AQMJ'b{)Uf
field type(max_length) DEFAULT 'default_value' (NOT) NULL
}可以使用的SQL语句。t{"`;Uj,]2[
CREATE TABLE useronline (#`PL-eC*X HJ
timestamp int(15) DEFAULT '0' NOT NULL,
ip varchar(40) NOT NULL,
file varchar(100) NOT NULL,kwOM4n)s1JJl a
PRIMARY KEY (timestamp),
KEY ip (ip),#uT/gQ:o!P
KEY file (file)
);下面我们是PHP脚本,首先我定义MYSQL的信息。c0w$x&N+w/u;h
$server = "localhost"; //你的服务器t#G5|#TQ&V-^
$db_user = "root"; //你的mysql的用户名C#\&Upi Hf
$db_pass = "password"; //你的mysql的密码"PAM_ M*EL z)OM
$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。;A,Sf2cz.n5@X
$timestamp = time();上面的完整代码:]X4c/t7Qs
<?php(a H{!J Zr0Q(m}
$server = "localhost"; //your server
$db_user = "root"; //your mysql database username
$db_pass = "password"; //your mysql database password if anyn/`K Wg%U
$database = "users"; //the db name&k]i:vC
$timeoutseconds = 300;//timeoutseconds limit
//get the current time.r*U7Xl0[/BL
$timestamp = time();
//calculate the lowest timestamp allowedA4aW c:S1P3{K]kC
$timeout = $timestamp-$timeoutseconds;CM)vk3Wv)Ly8XQj
?>连接mysql8eCpdJ'K E}j
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:'}s*U)g t^V
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 VALUES
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");
如果用户用错误信息的话,这样处理。*gVE zK
if(!($insert)) {!w2j:z7o8U b
print "Useronline Insert Failed > ";,c8p } yj s
}然后实现当超过设置的时间就删除该用户记录。;qj0O+qw0g
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");同样给出删除记录出错的处理。m T'S(rZx
if(!($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。/g[ x7@ o7M?.j
$user = mysql_num_rows($result);最后关闭数据库。3g%O'`{fCi1j
mysql_close();显示在线的人数。
if($user == 1) {1r0MR4Zlr
print("1 user online\n");*w6r9| g2}j2diP4M
} else {
print("$user users online\n");0A4R!w8tQhx
}最终把上面代码写成一个PHP文件如下。7T6z(w*SG8s
<?phpIx N?*|
//Put your basic server info hereq*wq{mK6Z
$server = "localhost"; //normally localhost
$db_user = "root"; //your MySQL database username}v0f,?h4GZ
$db_pass = "password"; //your MySQL database passwordl6k8T*d[H i
$database = "users";m8Qs/yo]ZU3uR
$timeoutseconds = 300; //it will delete all people which haven't refreshed(so probbably aret8d5Gn8`3]-_ q fq.}j
// offline or inactive) in $timieoutseconds time (so it actually checks the people that are active in the lastid!_)k.WBe
// $timeoutseconds seconds)5nq1U b c*x6}gK Q
//this is where PHP gets the time
$timestamp = time();c$LCa9O{+_LT
//counts the timeout, all people which have been seen last online in earlier than this timestamp, will get removed-[|4S8|#u
$timeout = $timestamp-$timeoutseconds;pJL1c0ab%W4A.D
//connect to database7WA {{gJ^
mysql_connect($server, $db_user);
//add the timestamp from the user to the online list7@-DS.d)cZ;zkcb1S^;N
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");
if(!($insert)) {
print "Useronline Insert Failed > ";
}IT0BM5JT$~
//delete the peoples which haven't been online/active in the last $timeoutseconds seconds.