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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!
G6HAyNM5} ^ 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。wPZs8` UM
首先我创建MYSQL数据库表。
I`i+h0N6^9r CREATE TABLE tablename (
3Gzf8A U T4A/h field type(max_length) DEFAULT 'default_value' (NOT) NULL
qn6GOhU)x }可以使用的SQL语句。F)q9]6@zq$bR
CREATE TABLE useronline (
Pg\O7qHR timestamp int(15) DEFAULT '0' NOT NULL,a-mj$X r0T(Gy2X
ip varchar(40) NOT NULL,
2}Zau `:x Apq file varchar(100) NOT NULL,J$ALs]0h.P#Z+D&Yl
PRIMARY KEY (timestamp),
6[;t_hgD6y,_Ux KEY ip (ip), `!T,s?e]D"w@
KEY file (file)
0X\8W"f:F.f );下面我们是PHP脚本,首先我定义MYSQL的信息。"v!|V(x3vR(_A
$server = "localhost"; //你的服务器
"RRF)e9t $db_user = "root"; //你的mysql的用户名tCe9^ R&b-d~R!Q0f$v
$db_pass = "password"; //你的mysql的密码3@?3JM6] w N
$database = "users"; //表的名字设置统计的时间(多少秒内在线人数)
wvpo.[LX ef $timeoutseconds = 300;取当前时间。Sh ^ b%bx\v
$timestamp = time();上面的完整代码:
U4U-j no <?php
*IN { ^Z'E $server = "localhost"; //your server
[6|n6QGH etBs3i $db_user = "root"; //your mysql database username
U&P O x$Phzx&o&a!e $db_pass = "password"; //your mysql database password if anyT4K]*jdS
$database = "users"; //the db name
"o%{kIvO5ee $timeoutseconds = 300;//timeoutseconds limit
4cb}U(X/j\.z //get the current time
)B;z-|,dg $timestamp = time();
UNCU&aU-S CE //calculate the lowest timestamp allowed
e"ja2D \Zcsw $timeout = $timestamp-$timeoutseconds;.fZjW QK1d c
?>连接mysql
2u5j&^ M8n V+v(l0J mysql_connect('localhost', 'username', 'password');也允许使用变量形式。
gz Q8pB^ mysql_connect($server, $db_user, $db_pass);如果mysql数据库没有密码的话可以使用下面代码连接
O;g&k#pB r x mysql_connect($server, $db_user);查询数据库的代码:y)W_ ^#l
mysql_db_query('database', 'query');我们只要有访客就要增加一条记录。`,k+d-]uo
$insert = mysql_db_query($database, "INSERT INTO useronline VALUESJ/jvHuoU_
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");
`le-W E 如果用户用错误信息的话,这样处理。
)W;Jp9j.r&uW(t9K if(!($insert)) {5P&Md O:qG
print "Useronline Insert Failed > ";1RH7{.Xg Zcd"P!G
}然后实现当超过设置的时间就删除该用户记录。 GH&PNq&i@6ne4N
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");同样给出删除记录出错的处理。
(|d6H$P/tMD3g if(!($delete)) {`o s_ ul;]JR
print "Useronline Delete Failed > ";Im*w Ac2Dt2p
}下面我们解决数据库中不同IP的问题y0_&?:`!]5JEx
$result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");使用
2UpIi6qt#^ mysql_num_rows(query);来统计用户,代码如下。h6F F#Tc"zf }D
$user = mysql_num_rows($result);最后关闭数据库。zH_T HmDBXV
mysql_close();显示在线的人数。J.A{2g&u [ G6y
if($user == 1) {
V([i(vzR O print("1 user online\n");
8X%p-Pjs } else {
7|2Aa:eE print("$user users online\n");1AuUW|C
}最终把上面代码写成一个PHP文件如下。4ht-}3y1Gu&H5k
<?phplFTsiLzx
//Put your basic server info hereq M RCk-QB
$server = "localhost"; //normally localhost{+Kp)]&^'v3^
$db_user = "root"; //your MySQL database usernamenC5}7J#i+G
$db_pass = "password"; //your MySQL database password
i$yr;xG1]Xy $database = "users";
1C ^LL^ $timeoutseconds = 300; //it will delete all people which haven't refreshed(so probbably are
,P`n*ciP#JtM // offline or inactive) in $timieoutseconds time (so it actually checks the people that are active in the last oid.l1S"v#J
// $timeoutseconds seconds)-w9o?\gds.h3Q,i$|P{
//this is where PHP gets the timeet3b+@$Fd [4f
$timestamp = time();6vm cN O([ O}}"A k
//counts the timeout, all people which have been seen last online in earlier than this timestamp, will get removedJ#O$P'lT7S%V ~2`
$timeout = $timestamp-$timeoutseconds;
W1j5v"KG //connect to database l"z z%|0~
mysql_connect($server, $db_user);
rh3Fau5bcr3U4q9N\+e //add the timestamp from the user to the online list
Bq@$i u2a $insert = mysql_db_query($database, "INSERT INTO useronline VALUES"U2K8u&Q)gEI
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')"); Bvy$M8w!J'm
if(!($insert)) {Xq3KiQ `,ij
print "Useronline Insert Failed > "; P };c {(f*f
}
[K H1T|UBn7] //delete the peoples which haven't been online/active in the last $timeoutseconds seconds.
+{0Z+d({ H*in*_ $delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");+r1z8FQ#}Q x(q
if(!($delete)) {
D c zu { _ wW wQR print "Useronline Delete Failed > ";Q0R0}:GJqg.|4~onD
}
/~L8VC%XC F$R~ //select the amount of people online, all uniques, which are online on THIS page
~1EQy'Xd $result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");
VnI1d-vC-_ if(!($result)) {*o-Fk0S8e5B6a.HTX
print "Useronline Select Error > ";
hKL2{P1V*M1` }
5nVPI2K Q[ //Count the number of rows = the number of people online
c"k"ek[s7rLte $user = mysql_num_rows($result);
&]7Em9IWF*J //spit out the results
#| P`o{9zw mysql_close();
*h/L]+q;\;L;a2Y0X if($user == 1) {
a%v4t*` x-M5z6V*Jx print("1 user online\n");h Ac`d.d&tYE
} else {%?o!iCAM$bw7P-M
print("$user users online\n");
vE+} AgS9MS }
7Z }9G-k9bS ?>o%XD|7c
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U5f6k zl/IPZ 以上代码我是在时代互联提供的免费试用主机上测试的,感觉效果还不错,性能很稳定,不信的话你也可以去试试。当然,记得指出我这个程序中的不足先哦。 l"A!bRwr(p
时代互联是行业内最早开始提供PHP 虚拟主机的公司之一,现在已经是的金牌域名注册商和中国互联网客户满意度十佳单位,产品功能已经非常完善 ,特别提一下几个特有用的功能:数据库自动备份、免费集成繁简通简装版、多域名绑定、多子网站支持、GCDN 网站加速器、镜像加速、高级访问统计系统、支持WAP、可选电信/网通/香港机房。
4kedjn)\ 我之前建站的时候选的是他们公司标准商务E型,因为这款机型还特别支持ASP.NET3.5(3.0/2.0/1.1)/ASP。
#~"?v%E(Y;\c 当然啦,这两款主机也是相当不错的。%y.M&T?7Q!y ry4w
智强商务B型:Unix /Linux 操作系统+独立网页空间1000MB+送1000MB邮局空间+100MB MySQL数据库空间=1869元/年
D ?,V`0d$kN5hck 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:Zq~h9}7B*Qo;k
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] $W*b-B'K%P i)mY8K0F2W+vp$N
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]
c0Wb7p5xn} 自己加QQ去问吧。

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