捌玖网络工作室 » 电脑软件 » 刚用PHP写了一个网站在线人数的程序，请大家进来指点下！

lilcy88 发表于 2008-5-28 10:40

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！
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x 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。
+Q#ju+}] 首先我创建MYSQL数据库表。
*riGipPb2@o CREATE TABLE tablename (F3v;oX?
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field type(max_length) DEFAULT 'default_value' (NOT) NULLs [5Gav)I5s p
}可以使用的SQL语句。
,Z7h"p6U-^d4l9PM2a CREATE TABLE useronline (m"_$@^
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timestamp int(15) DEFAULT '0' NOT NULL,Yf(T$u!`M0t
ip varchar(40) NOT NULL,3H;H(De"Qy"V;a
file varchar(100) NOT NULL,
\(f#md1w"Io PRIMARY KEY (timestamp),
xU Xz.p!O'ql
y KEY ip (ip),WOoWfV?aW2K
KEY file (file)
)Mxr ew );下面我们是PHP脚本，首先我定义MYSQL的信息。 {| N"a2N+s6@
$server = "localhost"; //你的服务器r)Zf;Oi_:bNc
$db_user = "root"; //你的mysql的用户名
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Cw}8e3O $db_pass = "password"; //你的mysql的密码7A(FCv7g
$database = "users"; //表的名字设置统计的时间(多少秒内在线人数)
c#e?C8yc $timeoutseconds = 300;取当前时间。
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$timestamp = time();上面的完整代码：4\3CO&]Jv h
<?php3i@
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$server = "localhost"; //your server
u0l5c`F(h g
J $db_user = "root"; //your mysql database username
fAIE {
v+uF $db_pass = "password"; //your mysql database password if any QM:|9xN8mxZ
$database = "users"; //the db name&[6]}Z)jr Ce1i
$timeoutseconds = 300;//timeoutseconds limit{s1b*pOG
//get the current time+lon3Al3oa;?g1|
$timestamp = time();1N3x9A.i4pc*|u
//calculate the lowest timestamp allowed#y_eV^Q gK
$timeout = $timestamp-$timeoutseconds;2W#U yu(\ t$Mu
?>连接mysql
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mysql_connect('localhost', 'username', 'password');也允许使用变量形式。
b0j-l9B]#_m&L mysql_connect($server, $db_user, $db_pass);如果mysql数据库没有密码的话可以使用下面代码连接kl2e)B BZl8fe0m
mysql_connect($server, $db_user);查询数据库的代码：
4KI"p]3tn mysql_db_query('database', 'query');我们只要有访客就要增加一条记录。B!Rk1J Ti+[1Q
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES
2v&@s Y1] L:k ('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");2TMF$MV?{E:~M
如果用户用错误信息的话，这样处理。
%~\"L,O;nCuJ if(!($insert)) {
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iqZ!bh rC:a print "Useronline Insert Failed > ";
7Z)Tw1S$n:pF1qDh4f }然后实现当超过设置的时间就删除该用户记录。
jGgS3M ^ $delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");同样给出删除记录出错的处理。P C6F _l_)H8k9Q
if(!($delete)) {#@qM:g:\9J$f%K
print "Useronline Delete Failed > ";
8~r0@`$j6Tv.{ }下面我们解决数据库中不同IP的问题
/Q]@&ZI4Q $result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");使用PtR)N1tW-cS
mysql_num_rows(query);来统计用户，代码如下。
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$user = mysql_num_rows($result);最后关闭数据库。C9y3vToB
mysql_close();显示在线的人数。
2q#UFnX%C(Oj if($user == 1) {
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CB print("1 user online\n");p&vV.c0@s
} else {
e i&D"]'uA/V print("$user users online\n");uu(R4Xp4cvS
}最终把上面代码写成一个PHP文件如下。
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<?php!U
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//Put your basic server info here
|#ypvVpb,V/O&ia $server = "localhost"; //normally localhostM*g:Z!fS"_
$db_user = "root"; //your MySQL database usernameHkBU.hMT eZ7d
$db_pass = "password"; //your MySQL database password^n'x,P*F"tk,F
$database = "users";
9Q3aYWt z $timeoutseconds = 300; //it will delete all people which haven't refreshed(so probbably are{9_N8{0I5i_
// offline or inactive) in $timieoutseconds time (so it actually checks the people that are active in the last+Kq
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// $timeoutseconds seconds) NM9q {N J.h}o
//this is where PHP gets the timeUD`L^S?.P
$timestamp = time();
Tz_;?"Th5M e //counts the timeout, all people which have been seen last online in earlier than this timestamp, will get removedsr+D5}xF\azL
$timeout = $timestamp-$timeoutseconds;&vf$UP9TPN di|m
//connect to database
i4Hi Ni#TB mysql_connect($server, $db_user);
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//add the timestamp from the user to the online list
z/`jGm $insert = mysql_db_query($database, "INSERT INTO useronline VALUES(E[?#v? nUy@
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");\#fP$G/hN6o Qc7F
if(!($insert)) {k/\t!PP?
print "Useronline Insert Failed > ";
1W1A&vW$cb2^X2N }
N\rm+D8} //delete the peoples which haven't been online/active in the last $timeoutseconds seconds. w0C1^0e$`h$XPq~
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");)o1u-^Z|q2b
if(!($delete)) {
P|Gz4m^z0kUylK print "Useronline Delete Failed > ";
;Pe\t%N*[fFGY }
C*G;TB5\&D#y //select the amount of people online, all uniques, which are online on THIS page}o*U}!yF
$result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");:sOpv4Jw#e'V9[
if(!($result)) {
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print "Useronline Select Error > ";Q-WS_8k8H t
}}j!uJOY#FL:EH4Z
//Count the number of rows = the number of people online M7?C k\{
$user = mysql_num_rows($result);`0t9~b3j(@!N
//spit out the resultsX&k:b-jz.Q9w
mysql_close();
D!fiP*Q:| if($user == 1) {!Ct_xqVuo
print("1 user online\n");
]NBZ zU } else {ld2d%B%Cvq#Y X%u$D#O
print("$user users online\n");
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VJ(@X5E 以上代码我是在时代互联提供的免费试用主机上测试的，感觉效果还不错，性能很稳定，不信的话你也可以去试试。当然，记得指出我这个程序中的不足先哦。0[_Xa Uz
时代互联是行业内最早开始提供PHP 虚拟主机的公司之一，现在已经是的金牌域名注册商和中国互联网客户满意度十佳单位，产品功能已经非常完善 ，特别提一下几个特有用的功能：数据库自动备份、免费集成繁简通简装版、多域名绑定、多子网站支持、GCDN 网站加速器、镜像加速、高级访问统计系统、支持WAP、可选电信/网通/香港机房。
.nv({0r#Ya2~1CX 我之前建站的时候选的是他们公司标准商务E型，因为这款机型还特别支持ASP.NET3.5(3.0/2.0/1.1)/ASP。
U5{XDb5S$^:M 当然啦，这两款主机也是相当不错的。fo4R"j/LF6hq
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