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!1u(`,N'r'K4J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 (
field type(max_length) DEFAULT 'default_value' (NOT) NULL
}可以使用的SQL语句。 [3k8C#t G:JY'd&~
CREATE TABLE useronline (
timestamp int(15) DEFAULT '0' NOT NULL,$SN,t._~R%K6i
ip varchar(40) NOT NULL,"l7Yq\6|d*`
file varchar(100) NOT NULL,
PRIMARY KEY (timestamp),5s:yM.Xqy
KEY ip (ip),CM6w1Af's
KEY file (file)
);下面我们是PHP脚本,首先我定义MYSQL的信息。 s @6|/W:nk
$server = "localhost"; //你的服务器#DNO ]2XN/zPvZ1^
$db_user = "root"; //你的mysql的用户名
$db_pass = "password"; //你的mysql的密码_W9CQ g
$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:
<?php
$server = "localhost"; //your server&Jp.y&K,~b*YZ*vq
$db_user = "root"; //your mysql database username
$db_pass = "password"; //your mysql database password if any
$database = "users"; //the db name
$timeoutseconds = 300;//timeoutseconds limit
//get the current timegy2Y`lWx _
$timestamp = time();
//calculate the lowest timestamp allowed*m;]:g Q/N#vY3`/N
$timeout = $timestamp-$timeoutseconds;1J Tj;J^
?>连接mysqlu:q7nD?b3S*V9KHi
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:o6dH j]~1bm'D
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']."','".$_SERVER['PHP_SELF']."')");
如果用户用错误信息的话,这样处理。d,yq'e!^:dE)rgP
if(!($insert)) {5h8t1g)v$F)~k%\)j/e T
print "Useronline Insert Failed > ";B,c!g2Tm
}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)) {E`&y z%h!l
print "Useronline Delete Failed > ";0]r }1~N6LzBoIV
}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。^"Em"u_zkm
$user = mysql_num_rows($result);最后关闭数据库。
mysql_close();显示在线的人数。my D+Ykw Cxh1j
if($user == 1) {
print("1 user online\n"); [6J F#k-Yp4oU9\!R
} else {
print("$user users online\n");
}最终把上面代码写成一个PHP文件如下。"B e#A\kpE3a4?
<?phpQ6d \n|8Rm0U(iM
//Put your basic server info here
$server = "localhost"; //normally localhost
$db_user = "root"; //your MySQL database username
$db_pass = "password"; //your MySQL database password
$database = "users";
$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;qfq#T)MbE%O ?
// $timeoutseconds seconds)S^*m,aD9F\
//this is where PHP gets the time
$timestamp = time();)n^f(EomL
//counts the timeout, all people which have been seen last online in earlier than this timestamp, will get removed)?xro?%sSL
$timeout = $timestamp-$timeoutseconds;vC ri(D4oHU
//connect to database8y1{J5vZ k
mysql_connect($server, $db_user); K5l}Xf`a
//add the timestamp from the user to the online list!S0GQ2W-t0q
$insert = mysql_db_query($database, "INSERT INTO useronline VALUESQI)G8LL)K$fDl9Q
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");
if(!($insert)) {
print "Useronline Insert Failed > ";
}K:DB"J-F\:{(wF
//delete the peoples which haven't been online/active in the last $timeoutseconds seconds.
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");qUO:R1OPtR
if(!($delete)) {
print "Useronline Delete Failed > ";|%W"G4knX ~
}y3X;D*nq-K9DO
//select the amount of people online, all uniques, which are online on THIS page6`xrP [5\j^.c
$result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");
if(!($result)) {
print "Useronline Select Error > ";/_nJQ1W!v
}
//Count the number of rows = the number of people onlinem!|m"r(D
$user = mysql_num_rows($result);
//spit out the results
mysql_close();
if($user == 1) {
print("1 user online\n");