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 (
field type(max_length) DEFAULT 'default_value' (NOT) NULL
}可以使用的SQL语句。J1Q T"Ku:gq7x
CREATE TABLE useronline (
timestamp int(15) DEFAULT '0' NOT NULL,
ip varchar(40) NOT NULL,
file varchar(100) NOT NULL,5sOZ6y?$d5lw3f {
PRIMARY KEY (timestamp),2_W Sm;mm
KEY ip (ip),I1s [Lv~G
KEY file (file)^7aB6bco |
);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l+i'g @Q
$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)
$timeoutseconds = 300;取当前时间。w@:CFUrM
$timestamp = time();上面的完整代码:
<?php yxof$SO
$server = "localhost"; //your serverAr(o?k z?
$db_user = "root"; //your mysql database username3X2y/G{yS1k]
$db_pass = "password"; //your mysql database password if any {*Rx4s ^ p|G F|E
$database = "users"; //the db name
$timeoutseconds = 300;//timeoutseconds limit~Q_4I?TK+] P
//get the current time!o!oi#?4sh4ct
$timestamp = time();tfvf"v3N+DI$m
//calculate the lowest timestamp allowed
$timeout = $timestamp-$timeoutseconds;
?>连接mysql
mysql_connect('localhost', 'username', 'password');也允许使用变量形式。hG)JkOui
mysql_connect($server, $db_user, $db_pass);如果mysql数据库没有密码的话可以使用下面代码连接*b a)i.IO1I'E
mysql_connect($server, $db_user);查询数据库的代码:E!W_l8sf)bC
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']."','".$_SERVER['PHP_SELF']."')");
如果用户用错误信息的话,这样处理。D+G&`yt\6m `2F}
if(!($insert)) {
print "Useronline Insert Failed > ";!Z lNr%`f ^:w
}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)) {w,vmh4j*E
print "Useronline Delete Failed > ";QvK1\wQee1oH.~
}下面我们解决数据库中不同IP的问题lQ!ET&i3cT{V Y
$result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");使用a:T$TJ}_0nVA)xE&`
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($user == 1) {
print("1 user online\n");
} else {
print("$user users online\n");.V6g p;_2Wo nY
}最终把上面代码写成一个PHP文件如下。
<?php
//Put your basic server info here:`QLyXD1Qt
$server = "localhost"; //normally localhost2Bi1S_C7^C`8W,SDU
$db_user = "root"; //your MySQL database username
$db_pass = "password"; //your MySQL database passwordD(TEa9k7S@
$database = "users";
$timeoutseconds = 300; //it will delete all people which haven't refreshed(so probbably aremN%e qym[9}
// 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 timeDDx4N7}A
$timestamp = time();p.s|X^I
//counts the timeout, all people which have been seen last online in earlier than this timestamp, will get removed
$timeout = $timestamp-$timeoutseconds;)YEGE]8{#M$vRKfnC
//connect to database
mysql_connect($server, $db_user);
//add the timestamp from the user to the online list
$insert = mysql_db_query($database, "INSERT INTO useronline VALUESAL0a QZ
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");
if(!($insert)) {
print "Useronline Insert Failed > ";!m Ai6F]7h D(de_.ol
} { L|(Mi@i
//delete the peoples which haven't been online/active in the last $timeoutseconds seconds.7Fh[w:L _)sT?*y
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");S!A.lad4B-rt
if(!($delete)) {
print "Useronline Delete Failed > ";
}
//select the amount of people online, all uniques, which are online on THIS page
$result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");
if(!($result)) {(\3])g J9V-n
print "Useronline Select Error > ";
}6uz;i Af)i
//Count the number of rows = the number of people online4k X,^5@ ~K&H7}4b
$user = mysql_num_rows($result);
//spit out the results
mysql_close();'d @cd&u MJ
if($user == 1) {,{*DzNMg
print("1 user online\n");XVu MI6E$V
} else {