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!tzg-jF [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。r2P5fm,E~k2s4k
首先我创建MYSQL数据库表。
CREATE TABLE tablename ( N3}-WL+sQ W_*yB
field type(max_length) DEFAULT 'default_value' (NOT) NULL
}可以使用的SQL语句。-vG"A@_R
CREATE TABLE useronline (DZ/x o%acy[
timestamp int(15) DEFAULT '0' NOT NULL,
ip varchar(40) NOT NULL,d5PU;fi"V:j2e
file varchar(100) NOT NULL,
PRIMARY KEY (timestamp),5c~'be2k
KEY ip (ip),
KEY file (file)
);下面我们是PHP脚本,首先我定义MYSQL的信息。3u^ M"Jq x.S_%Fu"M
$server = "localhost"; //你的服务器 efV!n.N}#ZZSd
$db_user = "root"; //你的mysql的用户名
$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)W-H/j0y:b1o H B h J
$timeoutseconds = 300;取当前时间。
$timestamp = time();上面的完整代码: B g$uM1JB-_~P
<?php+leE0?G3F$r0O
$server = "localhost"; //your server)d+aweI'w-r2N
$db_user = "root"; //your mysql database username
$db_pass = "password"; //your mysql database password if any_{1Y0D3K:C3`R
$database = "users"; //the db name
$timeoutseconds = 300;//timeoutseconds limit
//get the current time4i gA G g
$timestamp = time();Gbn Y/?i9PJ
//calculate the lowest timestamp allowedH;h@HHwI
$timeout = $timestamp-$timeoutseconds;
?>连接mysql ut1m zU9K5Ka \
mysql_connect('localhost', 'username', 'password');也允许使用变量形式。
mysql_connect($server, $db_user, $db_pass);如果mysql数据库没有密码的话可以使用下面代码连接6u$J-GMhE4F.u t8K
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。!m4F q;isG*|(a
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");` F#@Kx;W3N.n3z9Ris
如果用户用错误信息的话,这样处理。
if(!($insert)) {
print "Useronline Insert Failed > ";2CbAH-B:\I;[
}然后实现当超过设置的时间就删除该用户记录。CK2]TadV]3JV oaO
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");同样给出删除记录出错的处理。
if(!($delete)) {HZ}m6e1H}Y/xN p)m
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 Gv\QT[
mysql_num_rows(query);来统计用户,代码如下。%bgh5N Q |
$user = mysql_num_rows($result);最后关闭数据库。d#XE"kcg)N&j1uW
mysql_close();显示在线的人数。
if($user == 1) {
print("1 user online\n");T2xQ-_mfyTE9E
} else {
print("$user users online\n");"Hls ip-^I
}最终把上面代码写成一个PHP文件如下。V#jZ@ `3c|2a
<?php
//Put your basic server info hereM7AXq`
$server = "localhost"; //normally localhostyY ia&j2v b
$db_user = "root"; //your MySQL database username(R?gD+GVL
$db_pass = "password"; //your MySQL database passwordyx Ul/n2Z
$database = "users";c-}TO-[
$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
// $timeoutseconds seconds)^7@'Q#i].w1?q1^
//this is where PHP gets the time
$timestamp = time();SYb4~}3~9G,WJj2P
//counts the timeout, all people which have been seen last online in earlier than this timestamp, will get removed
$timeout = $timestamp-$timeoutseconds;
//connect to database6E;pKr yC;s
mysql_connect($server, $db_user);
//add the timestamp from the user to the online list
$insert = mysql_db_query($database, "INSERT INTO useronline VALUESR S&j2zxF6T
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");#vj"oPc2HT-F
if(!($insert)) {9|-Pfaoj
print "Useronline Insert Failed > ";Qjz:A5NV+EZ
}w(Y:[2Q {,X7I
//delete the peoples which haven't been online/active in the last $timeoutseconds seconds.z!pX.X Mg
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");*Y&|H F@
if(!($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']."' ");