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。F5c2Q HgBhN P
首先我创建MYSQL数据库表。
CREATE TABLE tablename (PV0N.a-B2I
field type(max_length) DEFAULT 'default_value' (NOT) NULL
}可以使用的SQL语句。
CREATE TABLE useronline (p'I6i6Ap.TW
timestamp int(15) DEFAULT '0' NOT NULL,
ip varchar(40) NOT NULL,1s6vdL|)C-?6X
file varchar(100) NOT NULL,,M4z0?]v
PRIMARY KEY (timestamp),
KEY ip (ip),9E prDusi VI0Z
KEY file (file)2T0Pn~4u
);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N-HwB|
$database = "users"; //表的名字设置统计的时间(多少秒内在线人数)&H4X_x(r.I;F
$timeoutseconds = 300;取当前时间。_bLs2g7a[b
$timestamp = time();上面的完整代码:/\n$^!^)^ \3{pg
<?php
$server = "localhost"; //your server
$db_user = "root"; //your mysql database username d$q.lc4ff(Y U$rs
$db_pass = "password"; //your mysql database password if any
$database = "users"; //the db name2Q^^q/?0] P$aVBb
$timeoutseconds = 300;//timeoutseconds limit
//get the current time
$timestamp = time();
//calculate the lowest timestamp allowedl8M2_Q0n-?It
$timeout = $timestamp-$timeoutseconds;
?>连接mysql4s"F6[b9B"x M!w/S
mysql_connect('localhost', 'username', 'password');也允许使用变量形式。
mysql_connect($server, $db_user, $db_pass);如果mysql数据库没有密码的话可以使用下面代码连接M[4p%\Wd
mysql_connect($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。&Xp:}E!`+P
$insert = mysql_db_query($database, "INSERT INTO useronline VALUESk"J#IZ:t+s!U8p
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");
如果用户用错误信息的话,这样处理。
if(!($insert)) {P7GA HW
print "Useronline Insert Failed > ";2]M!em"d!ZA
}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<$timeout");同样给出删除记录出错的处理。
if(!($delete)) {i/x^ S"_&M:Hy
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4Ac^"D~(SFq
mysql_num_rows(query);来统计用户,代码如下。 T;GQ-W`%Y
$user = mysql_num_rows($result);最后关闭数据库。3S(s@ub
mysql_close();显示在线的人数。
if($user == 1) {
print("1 user online\n");
} else {ZPj.G)ORJ
print("$user users online\n");'tJ F%~ cE+Feg
}最终把上面代码写成一个PHP文件如下。(C2Z2cP8`&px
<?php
//Put your basic server info hered VY:@-x;D;fN"yb
$server = "localhost"; //normally localhost,{1A$V+l8`]h
$db_user = "root"; //your MySQL database usernameaH6y${yy*A)U
$db_pass = "password"; //your MySQL database password
$database = "users";9T3P)sL)n`o
$timeoutseconds = 300; //it will delete all people which haven't refreshed(so probbably are8q;o V g!F)HE9{.~/|B
// offline or inactive) in $timieoutseconds time (so it actually checks the people that are active in the last-[6o)J6Qv*r1l3{ x
// $timeoutseconds seconds)
//this is where PHP gets the time
$timestamp = time();
//counts the timeout, all people which have been seen last online in earlier than this timestamp, will get removed1_Z4F\;B7DK;[
$timeout = $timestamp-$timeoutseconds;3ml'_2~'b
//connect to database
mysql_connect($server, $db_user);,Q\JV Xa%N!U
//add the timestamp from the user to the online list
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES