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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!9~5wU|f7p*Zczu$s
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。
x}'oxC:f.S/c4m 首先我创建MYSQL数据库表。M L7W(x)a"?-e
CREATE TABLE tablename (j ZIOD5^+c,[
field type(max_length) DEFAULT 'default_value' (NOT) NULL+iST U(m U
}可以使用的SQL语句。p {)} Dvn
CREATE TABLE useronline (
F!o.I&U.QK timestamp int(15) DEFAULT '0' NOT NULL,h%eQU0tq!p
ip varchar(40) NOT NULL,
OV B*n,M file varchar(100) NOT NULL,
.r/ZzT3|'I@] PRIMARY KEY (timestamp),6vqg[z8]p h4t
KEY ip (ip),
7e`:\1@e KEY file (file)(@u-]-~"Q7B Lb(Y
);下面我们是PHP脚本,首先我定义MYSQL的信息。
R nVI'd'x,I $server = "localhost"; //你的服务器Q^(we&|3e I c*T fm
$db_user = "root"; //你的mysql的用户名a0k Ri&xr;v|mj
$db_pass = "password"; //你的mysql的密码w/UJZ?xs
$database = "users"; //表的名字设置统计的时间(多少秒内在线人数)
ys"q A;{.m+V r] @ $timeoutseconds = 300;取当前时间。okby,I)}L9B
$timestamp = time();上面的完整代码:!b s,gUT h
<?php5])R(nu6O t1ts
$server = "localhost"; //your server9D$fwI D@v,[x"a
$db_user = "root"; //your mysql database username
C,o'^1{Bz $db_pass = "password"; //your mysql database password if any
4I*G2O8l u{%{.s}-dL_ $database = "users"; //the db nameH[%f1y#L+o)X|K*N
$timeoutseconds = 300;//timeoutseconds limit9E;^N:PM o'S
//get the current time
/C[/n l3] ~&UB $timestamp = time();C%r`#sGbK%\6|%pfC
//calculate the lowest timestamp allowed
]i4_%w0R5z(\s5l $timeout = $timestamp-$timeoutseconds;p Vdl,A)O}/y[
?>连接mysqli(_UX8_-g
mysql_connect('localhost', 'username', 'password');也允许使用变量形式。 `}'nCgxY4u
mysql_connect($server, $db_user, $db_pass);如果mysql数据库没有密码的话可以使用下面代码连接$B@n M+SA5_
mysql_connect($server, $db_user);查询数据库的代码:
o6o2Xw Xz%U%v mysql_db_query('database', 'query');我们只要有访客就要增加一条记录。
'W9MizSELv6| $insert = mysql_db_query($database, "INSERT INTO useronline VALUES!r~J S5^
('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");
"c m$b-M8v N!t4g{ 如果用户用错误信息的话,这样处理。
,c7M8\ kEKM r2E8f*_C"V0G if(!($insert)) {Pt#T^2g7g*W
print "Useronline Insert Failed > ";Zv!|d M[w
}然后实现当超过设置的时间就删除该用户记录。
6dLR@^d-S_ $delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");同样给出删除记录出错的处理。hq2@7C6^F KyJ:l
if(!($delete)) {
-H AvaJo&xq print "Useronline Delete Failed > ";
E8vdg S PI7G9g(|/~ }下面我们解决数据库中不同IP的问题(a{M-~kJc
$result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");使用
M0BDnz/TL([D mysql_num_rows(query);来统计用户,代码如下。
I }5Y:m/z"Az#o.} $user = mysql_num_rows($result);最后关闭数据库。z @:M"sf:g7u8I
mysql_close();显示在线的人数。"R6u;m)OpOI Pym
if($user == 1) {9s!y+`G#_o
print("1 user online\n");
a r?v&}#|{RIZ+Y8F } else {
]J4G6Q r5af{,Y print("$user users online\n");
}:UT.bfe{ }最终把上面代码写成一个PHP文件如下。+p*V5q ~7r6\Tg
<?php
Q9o-^,i$~\'k'L| //Put your basic server info here,] @8Wu t%_!h9Y5Y0G }
$server = "localhost"; //normally localhost
z _!?-hT N(\bqM $db_user = "root"; //your MySQL database username
"],k$i.giU(Ac[ $db_pass = "password"; //your MySQL database password*z2x/aN(n
$database = "users";
z;KC4Y cFE.T $timeoutseconds = 300; //it will delete all people which haven't refreshed(so probbably are-Tid5mt@R)W;X
// offline or inactive) in $timieoutseconds time (so it actually checks the people that are active in the lasth V8y)| k o
// $timeoutseconds seconds)QYS h TY,Xh,@3l
//this is where PHP gets the time
0U b`^ li $timestamp = time();:dV@eM&Xz
//counts the timeout, all people which have been seen last online in earlier than this timestamp, will get removed
J(yvC~ Q6o7i $timeout = $timestamp-$timeoutseconds;
!PO&Cm[HF //connect to database
-| F.N `9Y#Y.H-[,l)}UIt mysql_connect($server, $db_user);OV2Tv&SG+S9l
//add the timestamp from the user to the online list,j.}u4c)f.S I
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES
AOv:W }U s ('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')");
2m| ajg if(!($insert)) {
;l#u&H(H ^,fV print "Useronline Insert Failed > ";
yA0L2ej,]M4f }C"R"ib%rrfv0}
//delete the peoples which haven't been online/active in the last $timeoutseconds seconds.
dQ[6_ \;}.` $delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");
#rr;GU_(x if(!($delete)) {y/QZ7R g5s;E+D9o
print "Useronline Delete Failed > ";
#x ]\/\\Q }2X@'ewo|/F;U;c
//select the amount of people online, all uniques, which are online on THIS page*]%Q/URu+?@3o
$result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' ");
;G/lrf.d0yC if(!($result)) { @'c5P,L U$v
print "Useronline Select Error > ";o vDr1I$Rt1[@}Uv
})s6Vaw9F)zlQR
//Count the number of rows = the number of people online
#AG4|hmI/v,Ev,S_ $user = mysql_num_rows($result);
3Xee8MK"W s //spit out the resultsS y,d6T/J b
mysql_close();2f~m)o)C1K/@
if($user == 1) {5j\APu-C/j |
print("1 user online\n");
E7EL!F'J*_\2h*`UG } else {!c6e ~'t\.o s
print("$user users online\n");Jj'y7V-S(h4h8^T
}9PX v^$P#g;{w4x$Z
?>9zU1{/N0p{s
[url=http://www.now.cn/vhost/][img]http://b.todayisp.com/bbs/760x90h.gif[/img][/url](J"m]KL1C`
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。
QO9v3z)`!V$s 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。K*rkY w
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。n8b'y(Q%v C
当然啦,这两款主机也是相当不错的。
4NH8y2S|2u*J7g,l 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 C ufu5k~'m
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
]K1JQ v 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]
q+Aq]#e;i 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]
5TpK'\K v+Z'_I'SU(X9nT 自己加QQ去问吧。

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