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!ak3W r0~LR*d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。M~M[hUD&{
首先我创建MYSQL数据库表。
CREATE TABLE tablename (A1k0zz/{b @7GA
field type(max_length) DEFAULT 'default_value' (NOT) NULL
}可以使用的SQL语句。k1U+} N6h4h&W k5i)At
CREATE TABLE useronline (
timestamp int(15) DEFAULT '0' NOT NULL,
ip varchar(40) NOT NULL,
file varchar(100) NOT NULL,
PRIMARY KEY (timestamp),|/k5SD6}Yk
KEY ip (ip),dtB$Zk B
KEY file (file)Z,Qqi&s-?
);下面我们是PHP脚本,首先我定义MYSQL的信息。
$server = "localhost"; //你的服务器^ k p8e9b2r]:^$fS
$db_user = "root"; //你的mysql的用户名2iEZn(l]7|/N/QQB
$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)\6o3M3_Y)v&j%i
$timeoutseconds = 300;取当前时间。
$timestamp = time();上面的完整代码:
<?phpI7o&r!x/D
$server = "localhost"; //your server5a#^;Pvaij
$db_user = "root"; //your mysql database usernamey,DmY)yN
$db_pass = "password"; //your mysql database password if any
$database = "users"; //the db nameY.]Z,O;a"?+|&o
$timeoutseconds = 300;//timeoutseconds limit
//get the current time
$timestamp = time();
//calculate the lowest timestamp allowed
$timeout = $timestamp-$timeoutseconds;4f J Vr@EC
?>连接mysql O+l M^7u+f5_/X0|
mysql_connect('localhost', 'username', 'password');也允许使用变量形式。
mysql_connect($server, $db_user, $db_pass);如果mysql数据库没有密码的话可以使用下面代码连接-q]F3} Q*v hm
mysql_connect($server, $db_user);查询数据库的代码:I`ZN9Vx#Q'Ho
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 VALUES9Y g+a ],R'Vl
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");/uz9q;[q-q` f
如果用户用错误信息的话,这样处理。
if(!($insert)) {
print "Useronline Insert Failed > ";y"N"[Dj7E0f.P
}然后实现当超过设置的时间就删除该用户记录。%sJ%~6nd {,il7jd?o
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");同样给出删除记录出错的处理。n#}!bm!il$gP'D
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'dZHs+U
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。
if($user == 1) {"n'FbI0{-X
print("1 user online\n");u?O0f*O4}I2^f
} else {
print("$user users online\n");
}最终把上面代码写成一个PHP文件如下。 Y~~.w5Rs,m NKT
<?php
//Put your basic server info here:N4y|[g'w
$server = "localhost"; //normally localhostY A`{/skeV$g9u
$db_user = "root"; //your MySQL database username1ju&s.lrSkQ v
$db_pass = "password"; //your MySQL database password
$database = "users";{ wv)H]B@
$timeoutseconds = 300; //it will delete all people which haven't refreshed(so probbably are5FR&T9QwBEy
// offline or inactive) in $timieoutseconds time (so it actually checks the people that are active in the last
// $timeoutseconds seconds)/G,odgkbBp_
//this is where PHP gets the time[;SkS:[p$@-[ c1p6t
$timestamp = time();
//counts the timeout, all people which have been seen last online in earlier than this timestamp, will get removed+Q#XvM4?2i1I1t[-i
$timeout = $timestamp-$timeoutseconds;3UM9~x4u P
//connect to database'K`\pGX
mysql_connect($server, $db_user);&G!VqcW4kX
//add the timestamp from the user to the online list%Z ?k.Z'bw/k`
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES)Tg$`k.^O n,x`6o+@
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");
if(!($insert)) {8FtDiX;H;g%?Je
print "Useronline Insert Failed > ";
}9v0ro rZ6TGLI
//delete the peoples which haven't been online/active in the last $timeoutseconds seconds.
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");
if(!($delete)) {