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。;whD&R-D$x6nF
CREATE TABLE tablename (
field type(max_length) DEFAULT 'default_value' (NOT) NULL H` hUL*KA&fm
}可以使用的SQL语句。
CREATE TABLE useronline (
timestamp int(15) DEFAULT '0' NOT NULL,
ip varchar(40) NOT NULL,j {i @;u5qF
file varchar(100) NOT NULL,
PRIMARY KEY (timestamp),\k6H*~(@)a'd
KEY ip (ip), sg{ \%n9_6qn+B
KEY file (file)&f;Z]:Mv+Q~!s(jU
);下面我们是PHP脚本,首先我定义MYSQL的信息。
$server = "localhost"; //你的服务器"c1yrP {7R].a
$db_user = "root"; //你的mysql的用户名;h|&G*xqdH"t
$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。
$timestamp = time();上面的完整代码:
<?php
$server = "localhost"; //your server
$db_user = "root"; //your mysql database username Ih,L\[1bVfu
$db_pass = "password"; //your mysql database password if anyH@D,[S ur5V"C~ C
$database = "users"; //the db name~8bF.}$s%@q#D+r
$timeoutseconds = 300;//timeoutseconds limitx Ak-}+zT8Q
//get the current time
$timestamp = time();
//calculate the lowest timestamp allowed
$timeout = $timestamp-$timeoutseconds;
?>连接mysql Wvm3M/_:h
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:)juIRv
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']."','".$_SERVER['PHP_SELF']."')");@"e L0g y `d%tUu
如果用户用错误信息的话,这样处理。wWP{3Gw
if(!($insert)) {#ep1H`!bfa'q
print "Useronline Insert Failed > ";6Sn?k{ At&C ^~
}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<$timeout");同样给出删除记录出错的处理。m5s,c2pR
if(!($delete)) {!G6w&\$G5_c3}h*g
print "Useronline Delete Failed > ";
}下面我们解决数据库中不同IP的问题]#ox0o3{c
$result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");使用
mysql_num_rows(query);来统计用户,代码如下。(M"]9j _$C a'OMG
$user = mysql_num_rows($result);最后关闭数据库。
mysql_close();显示在线的人数。
if($user == 1) {
print("1 user online\n");/~6l6P9S$RB8T
} else {
print("$user users online\n");.[:NWHZ+n"V
}最终把上面代码写成一个PHP文件如下。an.Mg&T \,jJ
<?php#j]'rW3De$}
//Put your basic server info herevk\8}2Nn3B(FY
$server = "localhost"; //normally localhost
$db_user = "root"; //your MySQL database username8zT!Z8Pn2F!g
$db_pass = "password"; //your MySQL database passwordn2j7\f G kg8e
$database = "users";Z"hA)b'KCIa+g
$timeoutseconds = 300; //it will delete all people which haven't refreshed(so probbably are
// offline or inactive) in $timieoutseconds time (so it actually checks the people that are active in the last/m1VL Z/q~$o
// $timeoutseconds seconds)QAMY?%?6cK
//this is where PHP gets the time
$timestamp = time();s\vd7Y(L
//counts the timeout, all people which have been seen last online in earlier than this timestamp, will get removed/~NwgU#i%q
$timeout = $timestamp-$timeoutseconds;~ ?a'Gr:CbxW9{
//connect to database"hwfL:dUau
mysql_connect($server, $db_user);
//add the timestamp from the user to the online list _4zdV6H
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES9Q R*kM+@@
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");0upKm,L0J%WVK!y~
if(!($insert)) {?#^J` baw
print "Useronline Insert Failed > ";*VY`)uj xC#T
}
//delete the peoples which haven't been online/active in the last $timeoutseconds seconds.dj%n&@VG']g
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");Sa;G"Qx9N)Y
if(!($delete)) {
print "Useronline Delete Failed > ";
}
//select the amount of people online, all uniques, which are online on THIS page4hq9N8FI Ga
$result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' "); ihOL7C{7n
if(!($result)) {
print "Useronline Select Error > ";