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。)_ [Ey.a4ay m
首先我创建MYSQL数据库表。
CREATE TABLE tablename (
field type(max_length) DEFAULT 'default_value' (NOT) NULLw ZZ4PI3p
}可以使用的SQL语句。
CREATE TABLE useronline (
timestamp int(15) DEFAULT '0' NOT NULL,
ip varchar(40) NOT NULL,"_!_5a4_PgK
file varchar(100) NOT NULL,)A1sEFh a
PRIMARY KEY (timestamp),6F8X3MY)`7`
KEY ip (ip),[6{/O-J(^ C}
KEY file (file)Q-y#a:f Uj"VZt/Y
);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Y7DAlV
$database = "users"; //表的名字设置统计的时间(多少秒内在线人数)| ]h}xFU9A1R
$timeoutseconds = 300;取当前时间。j(H Hzb n"p+CG
$timestamp = time();上面的完整代码:
<?php?U grRmcnh
$server = "localhost"; //your serveroKm(v w r p
$db_user = "root"; //your mysql database username
$db_pass = "password"; //your mysql database password if any|%Ru1T o1u.\
$database = "users"; //the db name7[mjsy%R:p
$timeoutseconds = 300;//timeoutseconds limit
//get the current timeH },s:z0]W
$timestamp = time();!r[CQu^
//calculate the lowest timestamp allowed
$timeout = $timestamp-$timeoutseconds;
?>连接mysql[l;kG CzZ
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: RJZ*RV?O
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 VALUESy)bM4{Iyy
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");-I x\@zq7J"h
如果用户用错误信息的话,这样处理。
if(!($insert)) {TRp x(i6nn+a'o [4x
print "Useronline Insert Failed > ";D lS:[1b
}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<$timeout");同样给出删除记录出错的处理。M!Fp8xm+Q/|F
if(!($delete)) {
print "Useronline Delete Failed > "; e8ugC4M.r9}k:z,s
}下面我们解决数据库中不同IP的问题/W.nw0O'a:z}xV@K
$result = mysql_db_query($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。
$user = mysql_num_rows($result);最后关闭数据库。
mysql_close();显示在线的人数。$Z4}g%Q h/p
if($user == 1) {
print("1 user online\n");^ T Ydy4fS
} else {oO{ Dg6zL#Y(NN
print("$user users online\n");
}最终把上面代码写成一个PHP文件如下。
<?php1^3Kxm'Q(B
//Put your basic server info herek(~s'AR!P
$server = "localhost"; //normally localhost
$db_user = "root"; //your MySQL database usernameS1daCi|,m
$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
// $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 removed