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!6a6WJo6y#DjX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。A5e'XP{p
CREATE TABLE tablename (.w&rFH[_&bu
field type(max_length) DEFAULT 'default_value' (NOT) NULL
}可以使用的SQL语句。
CREATE TABLE useronline (U%W%^&tc
timestamp int(15) DEFAULT '0' NOT NULL,
ip varchar(40) NOT NULL,!El-[-g {(]H)]H5F
file varchar(100) NOT NULL,F%J8R iaeeu3~0j7G:qh
PRIMARY KEY (timestamp),}nH6M.n%^o*h
KEY ip (ip),ja]"n:u
KEY file (file)+i7w|f/X f Iu E
);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*xOam8O.CH
$database = "users"; //表的名字设置统计的时间(多少秒内在线人数)8^I U%NCv
$timeoutseconds = 300;取当前时间。
$timestamp = time();上面的完整代码:;R@i'J`0vE
<?php_'g$E(YQ$or r2A&UF3f
$server = "localhost"; //your serverZJUPb/W
$db_user = "root"; //your mysql database username
$db_pass = "password"; //your mysql database password if any
$database = "users"; //the db name/YA$B_&V+k8M/lr
$timeoutseconds = 300;//timeoutseconds limit
//get the current time
$timestamp = time();1KoBL;hJ
//calculate the lowest timestamp allowed
$timeout = $timestamp-$timeoutseconds;0[ n8tTq&`
?>连接mysqlRnu B9e7ug
mysql_connect('localhost', 'username', 'password');也允许使用变量形式。S3jE4[&Og3KC r
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:
mysql_db_query('database', 'query');我们只要有访客就要增加一条记录。^-`s|/^-p2k
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES0qHKW;|u3hmLI
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");"|g;[xZ S4a
如果用户用错误信息的话,这样处理。N$Q,ZOJ:c6~X-dq a
if(!($insert)) {
print "Useronline Insert Failed > ";
}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)) {
print "Useronline Delete Failed > ";]cw2jMv"Y
}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
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。ox-[@x7z
if($user == 1) {
print("1 user online\n");{%uH}0M"\*nrZ
} else {
print("$user users online\n");
}最终把上面代码写成一个PHP文件如下。
<?php*U9Vl^cX
//Put your basic server info here!i!l_,}o
$server = "localhost"; //normally localhost
$db_user = "root"; //your MySQL database usernameM}YI:rQdf!oe
$db_pass = "password"; //your MySQL database password vR6V8D%t2xq
$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 last1~!Sy.B1E*v F
// $timeoutseconds seconds);kpo:G~%DB
//this is where PHP gets the time-otV!?S4p^;Eb
$timestamp = time();
//counts the timeout, all people which have been seen last online in earlier than this timestamp, will get removedP1h~"o'}1A*w,^)D\
$timeout = $timestamp-$timeoutseconds;CPAfTx
//connect to database*_k$S~$FQ i
mysql_connect($server, $db_user);
//add the timestamp from the user to the online listJ C|1Us"P
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");/v#]{3ZT3M9f#Z
if(!($insert)) {$j-kl3Ifuk
print "Useronline Insert Failed > ";K(| g"d HnGE
}&V Fdpy!AJ
//delete the peoples which haven't been online/active in the last $timeoutseconds seconds.d7Bqgu"O
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");
if(!($delete)) {%S:uj#D N6]f5O/Ib-Z
print "Useronline Delete Failed > ";zA0JjVTs6BI
}
//select the amount of people online, all uniques, which are online on THIS page$]-Po C9NpT
$result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");
if(!($result)) {
print "Useronline Select Error > ";/RdJ&To
}Lo\A q.F!o
//Count the number of rows = the number of people online
$user = mysql_num_rows($result);'pF Q;EH;h!K }(_
//spit out the resultskc#^Qi
mysql_close();
if($user == 1) {,p$E:Xg4KCb3hz
print("1 user online\n");
} else {wOE7M0U@N"F
print("$user users online\n");W-]8X!n j!]+a
}{ v&H*_;HEflH
?>eVh D5M`w.w.W
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自己加QQ去问吧。
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