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。#Pl$S9~|KO!h6l1N
CREATE TABLE tablename (kEm dC3Yi
field type(max_length) DEFAULT 'default_value' (NOT) NULL
}可以使用的SQL语句。X#Lc!Y^~x
CREATE TABLE useronline (
timestamp int(15) DEFAULT '0' NOT NULL,
ip varchar(40) NOT NULL,
file varchar(100) NOT NULL,Q(?J:J%{%z_
PRIMARY KEY (timestamp),
KEY ip (ip),
KEY file (file)6[0{Q}k0S.N
);下面我们是PHP脚本,首先我定义MYSQL的信息。
$server = "localhost"; //你的服务器koG{.D)r(l
$db_user = "root"; //你的mysql的用户名]1r3{5v `j,\3vf+T
$db_pass = "password"; //你的mysql的密码,F?OABiz
$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:.cb(I3F#[G&JV9L2^]!o
<?php-Z6]t7T2P+~0UwnGr
$server = "localhost"; //your server
$db_user = "root"; //your mysql database username
$db_pass = "password"; //your mysql database password if any1h$Zc tOG1z.?$aj
$database = "users"; //the db name
$timeoutseconds = 300;//timeoutseconds limit_L3{Zf
//get the current time
$timestamp = time();+Zr*j:~%YTb
//calculate the lowest timestamp allowed/Uw4N0el ZqG[:L
$timeout = $timestamp-$timeoutseconds;
?>连接mysql
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, $db_user);查询数据库的代码:f0@$sc]N
mysql_db_query('database', 'query');我们只要有访客就要增加一条记录。*Q v5l'v ~[J
$insert = mysql_db_query($database, "INSERT INTO useronline VALUESB@s]U
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");-ok j6e_I
如果用户用错误信息的话,这样处理。dTrEm
if(!($insert)) {
print "Useronline Insert Failed > ";(x+V&O4tu4SDx;W}!v
}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<$timeout");同样给出删除记录出错的处理。6tyx0uv#A d5Wq(WX
if(!($delete)) {
print "Useronline Delete Failed > ";
}下面我们解决数据库中不同IP的问题4`r&t[Gs8u'Z
$result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");使用'nf5vSa/M i+K
mysql_num_rows(query);来统计用户,代码如下。P3?O7].a5qR
$user = mysql_num_rows($result);最后关闭数据库。
mysql_close();显示在线的人数。&KX~ V3s)a
if($user == 1) {2xs){3G)\
print("1 user online\n");E-@n{ fIy
} else {
print("$user users online\n");3x~0Q ]Vb)y%u
}最终把上面代码写成一个PHP文件如下。
<?php3GF5b+p0B|d[
//Put your basic server info here
$server = "localhost"; //normally localhost
$db_user = "root"; //your MySQL database usernamebzl5f$F ?
$db_pass = "password"; //your MySQL database password w?R!H"y(V;Uu
$database = "users";/XGO:@i` p*y5Zy
$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();&|v&K\W1U
//counts the timeout, all people which have been seen last online in earlier than this timestamp, will get removed
$timeout = $timestamp-$timeoutseconds;
//connect to database
mysql_connect($server, $db_user);'wu5W-M5|"UT8j
//add the timestamp from the user to the online list?6KL;bq dPk
$insert = mysql_db_query($database, "INSERT INTO useronline VALUESjlsKsK[#ki:m n
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");
if(!($insert)) {6|7N l.?b
print "Useronline Insert Failed > ";
}
//delete the peoples which haven't been online/active in the last $timeoutseconds seconds.
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");
if(!($delete)) {
print "Useronline Delete Failed > ";
}
//select the amount of people online, all uniques, which are online on THIS page-E}V U*^*MDi7x8lq
$result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");
if(!($result)) {N6s w!f$K-cP
print "Useronline Select Error > ";
}E&z4lk0g%g1E
//Count the number of rows = the number of people online5|:C8d"o#\PL M
$user = mysql_num_rows($result); oay:DN+vF#@
//spit out the results
mysql_close();
if($user == 1) {
print("1 user online\n");
} else {
print("$user users online\n");
}
?>-aOZ:I2k|%]&O1v-f!K
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以上代码我是在时代互联提供的免费试用主机上测试的,感觉效果还不错,性能很稳定,不信的话你也可以去试试。当然,记得指出我这个程序中的不足先哦。
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我之前建站的时候选的是他们公司标准商务E型,因为这款机型还特别支持ASP.NET3.5(3.0/2.0/1.1)/ASP。
当然啦,这两款主机也是相当不错的。w)E5e9rt4S*[ P;k^%[:N
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自己加QQ去问吧。
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