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！],`R#quF
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。
Jq8d&\%g%Ls,\$v'} 首先我创建MYSQL数据库表。
Kf2Z:qC/TV CREATE TABLE tablename (6z C;Zk0t
field type(max_length) DEFAULT 'default_value' (NOT) NULL
|\6Q2H.q5{Em }可以使用的SQL语句。2[4}[D2Q.d#W@
CREATE TABLE useronline (
p5K9s(I*}5~{mD timestamp int(15) DEFAULT '0' NOT NULL,
!P} S2\0\JM@B-gC1z ip varchar(40) NOT NULL,}r g^r4m$X"P
file varchar(100) NOT NULL,
&|t"]-U2gJ(fj(Z8@ PRIMARY KEY (timestamp),Y2o*N9H.k1t
KEY ip (ip),
!mC'cJ} A7zzF KEY file (file)
3R!N ^%anV,A );下面我们是PHP脚本，首先我定义MYSQL的信息。
$e%RqIA P` $server = "localhost"; //你的服务器
-P!i4`SkK~ $db_user = "root"; //你的mysql的用户名
@4k1DPk $db_pass = "password"; //你的mysql的密码
?:{L&g+q $database = "users"; //表的名字设置统计的时间(多少秒内在线人数)"m4D+{y6J1E C3Z*y%z6o*L/c
$timeoutseconds = 300;取当前时间。%ly YM_5kz5_Pt q
$timestamp = time();上面的完整代码：
/_bRke
T{&z!Z <?php
s#{:[It(w $server = "localhost"; //your server
l$R M Qy}pm $db_user = "root"; //your mysql database username^Y1nEn3TN
$db_pass = "password"; //your mysql database password if any
:BDfH2z})Xz $database = "users"; //the db name+l y)Q4w V+Z}-m
$timeoutseconds = 300;//timeoutseconds limit
,oy't:MP7Q])o| //get the current time
&n/R*G7[Z sAE1l`IA $timestamp = time();7jUd.wSM m
//calculate the lowest timestamp allowed
_xn;II?(k $timeout = $timestamp-$timeoutseconds;
YcHR^e f%y ?>连接mysql1N+`(L;ym6u
mysql_connect('localhost', 'username', 'password');也允许使用变量形式。
L m/K8S`H mysql_connect($server, $db_user, $db_pass);如果mysql数据库没有密码的话可以使用下面代码连接?+@u-nV
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mysql_connect($server, $db_user);查询数据库的代码：
'hl!|!zo.k mysql_db_query('database', 'query');我们只要有访客就要增加一条记录。'Q-^l!G1pW&e
h"V
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES
'} d`1KYX6\ V ('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");7~!pOlep*`d
如果用户用错误信息的话，这样处理。
"O
[(~j9u.QFF
{7r if(!($insert)) {
FmP8n3Y0C print "Useronline Insert Failed > ";
['V c o%z }然后实现当超过设置的时间就删除该用户记录。
fb#R1a$Y'M"X $delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");同样给出删除记录出错的处理。%vM|7f;FZkb
if(!($delete)) {
W^4Q5]u Mr%vE0? print "Useronline Delete Failed > ";
4EN5X"L?[%B }下面我们解决数据库中不同IP的问题
|8q!a&y0z5Fq(u $result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");使用opYw%Ek
mysql_num_rows(query);来统计用户，代码如下。+yo~1o
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$user = mysql_num_rows($result);最后关闭数据库。
G!b&sHoSI[Qkev mysql_close();显示在线的人数。
}#p(D3cmG if($user == 1) {
ICtr[3m8SMC print("1 user online\n");
7Kl ~gIXK/J&h } else {
v'D+Uri_*`A print("$user users online\n");:n"t;} yW9lIb
}最终把上面代码写成一个PHP文件如下。4?/v"Ra|;]
<?phpMmTa~
//Put your basic server info hereA[b2O:qf
D;Y&x3cYI
$server = "localhost"; //normally localhost
v[/dV3c,bp(I $db_user = "root"; //your MySQL database username
#b,B9y#f;N'{] U $db_pass = "password"; //your MySQL database password
%z
l Kr3s
S h $database = "users";Wk D(b!F
$timeoutseconds = 300; //it will delete all people which haven't refreshed(so probbably are+L\{p3O0`@K
// offline or inactive) in $timieoutseconds time (so it actually checks the people that are active in the last

Hi\Squ ] // $timeoutseconds seconds)
ric+j|wd //this is where PHP gets the time
?q7HDFz&`7Yh P $timestamp = time();q\Co.ozaq(~
//counts the timeout, all people which have been seen last online in earlier than this timestamp, will get removed
8~in4k/^7S $timeout = $timestamp-$timeoutseconds;
5af;w
],Bi //connect to database

R:aJ}9_)C mysql_connect($server, $db_user);.n['TNe-zi
//add the timestamp from the user to the online list
f2G:_4y(E]A $insert = mysql_db_query($database, "INSERT INTO useronline VALUES-]U \v
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('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");+y US"vj0P"l
if(!($insert)) {7b5N%vo)k1h\2J;U!xgl
print "Useronline Insert Failed > ";G t%d:V7i2w
}cQw
Opl0o j&}
//delete the peoples which haven't been online/active in the last $timeoutseconds seconds.s4EyN4`6`-z4a"C
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");S
E+}$IKr*o
zKy
if(!($delete)) {a@PDf&i'Ba
print "Useronline Delete Failed > ";
p2{4p:rs#^9K1} }
xc-Z1s/]2k //select the amount of people online, all uniques, which are online on THIS page]E
v{6F*w7nO%y
$result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");3pX7m,B2G
if(!($result)) {/y!W1_^v`&IS
print "Useronline Select Error > ";
k I A2e{
B^E!q }uR \Atwy{ m*Rt
//Count the number of rows = the number of people online
3Q&Xz&bI0Mqg6?7h $user = mysql_num_rows($result);
2tyo"{*Tvj //spit out the results
km b4DP
u1I"{2` mysql_close();.eg+c)Z{R
if($user == 1) {
2\ h\Cz#o] print("1 user online\n");UC/PVj;_x] Lm
} else {t*U;X3R(P%Au
print("$user users online\n");TZ0g'HQR`e*^ CtN
}
K [HLI*z*aEg:a ?>
e2]p"]$cVq$R$V [url=http://www.now.cn/vhost/][img]http://b.todayisp.com/bbs/760x90h.gif[/img][/url]D4Q"z| P.\
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。? q-aCA
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。y!y0xV F
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。 Y3a9F(g[0g
当然啦，这两款主机也是相当不错的。9q
N[.A+aR1fB
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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
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