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！R6k.T Z8DT,q)b+t~
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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。
4qd Or0H'`Q 首先我创建MYSQL数据库表。
1GS(};Yo9S PY CREATE TABLE tablename (
k&p)G:\8R,sEm field type(max_length) DEFAULT 'default_value' (NOT) NULL
8tZ+eR,n(\L5f` }可以使用的SQL语句。t&T7X1sP#Vxb
CREATE TABLE useronline (v5L.Ld`,ItY
timestamp int(15) DEFAULT '0' NOT NULL,
{r1DEY|Y | ip varchar(40) NOT NULL,&p&[&K+q8GEl uh
file varchar(100) NOT NULL,
%Kv,BR;B]2c]2kWQ PRIMARY KEY (timestamp),
f@*_t5DT,V KEY ip (ip),Kk Sa8K{VG%K
KEY file (file)Y_5F]V6K3i
);下面我们是PHP脚本，首先我定义MYSQL的信息。-qQ;F8t3S1i
$server = "localhost"; //你的服务器I'k-N T,P
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$db_user = "root"; //你的mysql的用户名~@aMIH
$db_pass = "password"; //你的mysql的密码^~"fP `'~\4_B
$database = "users"; //表的名字设置统计的时间(多少秒内在线人数)
b4Ma0|h0Mr $timeoutseconds = 300;取当前时间。8TO"X7N(H'HI2` Y
$timestamp = time();上面的完整代码：7se3ri [!Kh)d?
<?php0|jmL ko#m
$server = "localhost"; //your server
A'|J1k9PGeq8\B $db_user = "root"; //your mysql database username
Q3|vmW~X#| $db_pass = "password"; //your mysql database password if any2dgZ1^TE
$database = "users"; //the db name
.]U? ~/Wy#PG $timeoutseconds = 300;//timeoutseconds limit{ Mx;Mll_a2^
//get the current time
#bVw)mZ5Xw $timestamp = time();J$R\:A.H5LA
q
//calculate the lowest timestamp allowed
*~TOW;R0m%]X;L)Z;d.A $timeout = $timestamp-$timeoutseconds;
a4YVdp] ?>连接mysql
6Zf.l y x e%ih-xv"R mysql_connect('localhost', 'username', 'password');也允许使用变量形式。
M2g:SIn|cCS w mysql_connect($server, $db_user, $db_pass);如果mysql数据库没有密码的话可以使用下面代码连接
"Bi*?{ o7Tt mysql_connect($server, $db_user);查询数据库的代码：8H'Q(j@7YA5D1B-h)]
mysql_db_query('database', 'query');我们只要有访客就要增加一条记录。e,j7oi5w
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES
}\b
l NJ6P"y,Z ('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");%p$FTs]e$^'x+|
如果用户用错误信息的话，这样处理。
x Ja4W0k3Y if(!($insert)) {
:Hv1[|(R'| print "Useronline Insert Failed > "; @sg al5g
}然后实现当超过设置的时间就删除该用户记录。TQNEDqQlTR
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");同样给出删除记录出错的处理。ZJV%H.g
if(!($delete)) { bD+~TY#}
print "Useronline Delete Failed > ";~:W,u9v H%kB[*a
}下面我们解决数据库中不同IP的问题!F m JWS]
$result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");使用9@ a)Q-K*|*a(FU8o
mysql_num_rows(query);来统计用户，代码如下。O C3b;x2}C7f
$user = mysql_num_rows($result);最后关闭数据库。m DUF#bV
mysql_close();显示在线的人数。
$@/bC(_pvwTg*a if($user == 1) {
,@h0N1X5r6iJq print("1 user online\n");
o:^7vcF0y:g#b } else {#tH7j-Vh\0N:N
print("$user users online\n");
*ch/LR+U h-G,o }最终把上面代码写成一个PHP文件如下。-S"I`P7OF#y4A'P*g
<?php\POPC'jV|
//Put your basic server info here
%jcao ??!^J f $server = "localhost"; //normally localhost
PC8VE7WT'N#m4_)H $db_user = "root"; //your MySQL database usernameh6v-w$Dpa0Mz
$db_pass = "password"; //your MySQL database password
ej NO4r^.{ $database = "users";
hq M:glSw $timeoutseconds = 300; //it will delete all people which haven't refreshed(so probbably are!B&tX$ln+CP#O
// offline or inactive) in $timieoutseconds time (so it actually checks the people that are active in the last q G+aF.E3toq-u
// $timeoutseconds seconds)A/xF`}V^
//this is where PHP gets the time*`+g,\&o#Cq#qs$dX5s#~
$timestamp = time();J:q0vr7N/u
//counts the timeout, all people which have been seen last online in earlier than this timestamp, will get removedtO"}2i,Kxs{-T
$timeout = $timestamp-$timeoutseconds;Ga~{D2x6X
//connect to database+Njax^"e$FX
mysql_connect($server, $db_user);"`-N s}'_-K,X:j
//add the timestamp from the user to the online list
0MD.hf5Yr1Q$xO $insert = mysql_db_query($database, "INSERT INTO useronline VALUES-E~p,TBmjlZ
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");
-qKo9F)S?r7o if(!($insert)) {
t4hI+_0IAKd"^ print "Useronline Insert Failed > ";
&b HVu6y2S S,K }
q~%Nl*mX //delete the peoples which haven't been online/active in the last $timeoutseconds seconds.
-v!bP[F|$X%r"q $delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");.M h8R-F2Z&S C
if(!($delete)) {T+SXZNvOmy
print "Useronline Delete Failed > ";/o V0m#x(f-g
}qqOJA%C ^
//select the amount of people online, all uniques, which are online on THIS page
P;npV!SdV $result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");
WK)k;S;c if(!($result)) {
*F*a r;SX\n print "Useronline Select Error > ";
"|;yo5A8H)rT }
t!g/s:xO0E cUBG //Count the number of rows = the number of people online r WA-s.FmW4\O1Z
$user = mysql_num_rows($result);
%~.vGA!XH //spit out the results }ezz m)C&bM S1~
mysql_close();
/kd7?0Ut4V5m0W if($user == 1) {W3eh9[g\3P
print("1 user online\n");6@p|@2l3lm
} else {
m9x7C
_ K"e2Y print("$user users online\n");F,sR(MB0NH
}I|"uf)St?
?>qS-kehWI!s
[url=http://www.now.cn/vhost/][img]http://b.todayisp.com/bbs/760x90h.gif[/img][/url][H0?0]b+S*P)x'~Fe
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。W$HC~a}'V ]A
时代互联是行业内最早开始提供PHP 虚拟主机的公司之一，现在已经是的金牌域名注册商和中国互联网客户满意度十佳单位，产品功能已经非常完善 ，特别提一下几个特有用的功能：数据库自动备份、免费集成繁简通简装版、多域名绑定、多子网站支持、GCDN 网站加速器、镜像加速、高级访问统计系统、支持WAP、可选电信/网通/香港机房。ASr
^/k!oW;L
我之前建站的时候选的是他们公司标准商务E型，因为这款机型还特别支持ASP.NET3.5(3.0/2.0/1.1)/ASP。5}[V%W(x\D
当然啦，这两款主机也是相当不错的。$sL[X&E4E3B{
智强商务B型：Unix /Linux 操作系统+独立网页空间1000MB+送1000MB邮局空间+100MB MySQL数据库空间=1869元/年
ZA trW 标准商务B型：Unix /Linux 操作系统+独立网页空间500MB+送800MB邮局空间+60MB MySQL数据库空间=1365元/年
nKmg)i%_9^1h 提供一下这个公司的联系方式：请见：[url=http://www.now.cn/vhost/]http://www.now.cn/vhost/[/url]
cit4Y3^JUi 空间专线： 0756-2623871  QQ：168075865，好象还有全球免费网络电话:全球免费咨询电话 [url=http://www.now.cn/callcenter/call.net?LineName=55]http://www.now.cn/callcenter/call.net?LineName=55[/url]y*NO7O#teA#y3MW
自己加QQ去问吧。

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