草根站长论坛 » 草根网站建设运营 » 通过PHP+MYSQL实现 网站在线人数统计

石头 发表于 2008-6-22 21:56

通过PHP+MYSQL实现 网站在线人数统计

网站在线人数的程序代码，后台有MySQL(和PHP搭配之最佳组合)数据库支持。可以直接统计出网站当前的在线人数。 #I3_Lmx7v8Z
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首先是创建MySQL(和PHP搭配之最佳组合)数据库表。)J7K)k)k'P!D?
[code]CREATE TABLE tablename ( /H/I??+hF
field type(max_length) DEFAULT 'default_value' (NOT) NULL 6W h)G|$Qk+qo$b-g
} [/code]5Pt$tE T8h
可以使用的SQL语句。
TmK)f5{rz+^ [table=95%][tr][td][color=#000000][code]
'^wr w!N oxIl CREATE TABLE useronline ( Txw0[M {Y(YS
timestamp int(15) DEFAULT '0' NOT NULL, ;my*u#Hn3|E3Bp
x^
ip varchar(40) NOT NULL, EB5d#F,z bK3an
file varchar(100) NOT NULL, ,CX?rD
Prima(最完善的虚拟主机管理系统)RY KEY (timestamp),
eI,dG7t q4U KEY ip (ip),
V t4||)S{W)@VF/] KEY file (file)
m2m,w Y%x6\!DN0]p ); tscC-Bch&L
[/code][/color]
z-s&Vtz/gW [/td][/tr][/table]-B])ES/go q(~'|
下面我们开始使用PHP脚本，首先定义MySQL(和PHP搭配之最佳组合)的信息。
[ oZbJK ^+?#W'o [table=410][tr][td][table=95%][tr][td][color=#000000][code]$server = "localhost"; //你的服务器 ^+x#vq~-r
$db_user = "root"; //你的MySQL(和PHP搭配之最佳组合)的用户名 X
ZV6x+s9pvfi)N
`
$db_pass = "password"; //你的MySQL(和PHP搭配之最佳组合)的密码
7J1DeZ&d2HGP $database = "users"; //表的名字 [/code][/color][/td][/tr][/table])X.vp*Z0QrB!|#IF
sU XJ;V/Fb0G
[color=#000000]设置统计的时间(多少秒内在线人数)[/color]
(V@,u9FiSp.r'LC [table=95%][tr][td][color=#000000][code]$timeoutseconds = 300; [/code][/color][/td][/tr][/table]
1z,N{e|c7j [color=#000000]      取当前时间。[/color]
xP`*|L|[^ [table=95%][tr][td][color=#000000][code]$timestamp = time();[/code][/color][/td][/tr][/table]
/[vM W)FH [color=#000000]      上面的完整代码：[/color]
7K5p,tm:Wj1q [table=95%][tr][td][color=#000000][code]<?php )N
g:tidV#C,}
$server = "localhost"; //your server
Lw4^;uz $db_user = "root"; //your MySQL(和PHP搭配之最佳组合) database username aQ `2XZtO
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$db_pass = "password"; //your MySQL(和PHP搭配之最佳组合) database password if any
6Y6t7E&{8{p"p S $database = "users"; //the db name |a;?cVI
$timeoutseconds = 300;//timeoutseconds limit k:\XS}C8Ccz s/w
//get the current time
BU
wa3ZJ $timestamp = time();
,lB3Kj}(X //calculate the lowest timestamp allowed 9@1o
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$timeout = $timestamp-$timeoutseconds;
vyv u+HyCV ?> [/code][/color][/td][/tr][/table]
9nF kL$R,|+J#Y [color=#000000]连接MySQL(和PHP搭配之最佳组合)[/color]
$ku8ZOI;M/R~&y [table=95%][tr][td][color=#000000] [code]MySQL(和PHP搭配之最佳组合)_connect('localhost', 'username', 'password'); [/code][/color][/td][/tr][/table]9hDp] e%w7C6]i
c.beA uw)?
[color=#000000]也允许使用变量形式。
[.C:Xb5}]6t?        [/color][table=95%][tr][td][color=#000000][code]MySQL(和PHP搭配之最佳组合)_connect($server, $db_user, $db_pass); [/code][/color][/td][/tr][/table]3p m/ugP4q Y
[color=#000000]      如果MySQL(和PHP搭配之最佳组合)数据库没有密码的话可以使用下面代码连接（当然建议大家一定要设置好自己的密码，这样起码黑客得要解密啊）lg
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[/color][table=95%][tr][td][color=#000000][code]MySQL(和PHP搭配之最佳组合)_connect($server, $db_user); [/code][/color][/td][/tr][/table]{7T@I@Z
[color=#000000]      查询数据库的代码：
a4F(SnC [/color][table=95%][tr][td][color=#000000][code]MySQL(和PHP搭配之最佳组合)_db_query('database', 'query'); [/code][/color][/td][/tr][/table]b|#zJ6w+A&e
2BTF0CK
[color=#000000]      我们只要有访客就要增加一条记录。[/color]
*H$j-g4LP&\8Me [table=95%][tr][td][color=#000000][code]$insert = MySQL(和PHP搭配之最佳组合)_db_query($database, "INSERT INTO useronline VALUES
q+DR$b;F;xA ('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')"); [/code][/color][/td][/tr][/table]
2jx_2m|N4UR(Sy [color=#000000]      然后我们给出如果用户用错误信息的处理方式。
s"f?'Y
]D { [/color][table=95%][tr][td][color=#000000][code]if(!($insert)) { *K&EWu1s*K?_,B%{O Q
print "Useronline Insert Failed > ";
j.{7S-nf.w)v3J } [/code][/color][/td][/tr][/table]
p:x)s UI#Y
o9V [color=#000000]然后我们得实现当超过我们设置的时间我们就要删除该用户记录。e(i{ZX(ek
  [/color][table=95%][tr][td][color=#000000]  [code]$delete = MySQL(和PHP搭配之最佳组合)_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout"); [/code][/color][/td][/tr][/table] E${7bdR*U
[color=#000000]      同样给出删除记录出错的处理。[/color]VOtJ R"r&E]
[table=95%][tr][td][color=#000000][code]if(!($delete)) {
"xMRP)r hP2B? print "Useronline Delete Failed > "; qB,O/SFf0?
} [/code][/color][/td][/tr][/table]
{ Sw { t
`c'fZf
ByGLc [color=#000000]      下面我们显示数据库中有多少个不同的IP[/color].E#MM |qK H Zi
[table=95%][tr][td][color=#000000][code]$result = MySQL(和PHP搭配之最佳组合)_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' "); [/code][/color][/td][/tr][/table]
E7wv!v3?d4b){Z0w/s
k'z!fMy;Dn w [color=#000000]      我们使用MySQL(和PHP搭配之最佳组合)_num_rows(query);来统计用户，代码如下:
4r0y#Oz+K;i(W8v \a-lo`+H
[/color][table=95%][tr][td][color=#000000][code]$user = MySQL(和PHP搭配之最佳组合)_num_rows($result); [/code][/color][/td][/tr][/table].JY6xv1aK2V\

'M_"D3_:Dy;hI(nB p [color=#000000]      最后我们要关闭数据库。 s'p,sP6r|)]

W,s'h/F xZU#[ [/color][table=95%][tr][td][color=#000000][code]MySQL(和PHP搭配之最佳组合)_close(); [/code][/color][/td][/tr][/table]3]5w1P8W
j@'v(Z2~3_;?
9J"xoYi(x d
[color=#000000]      显示在线的人数。[/color]
l7P hFQXBg [table=95%][tr][td][color=#000000][code]if($user == 1) { 2q0{1M&S5pC$D~
print("1 user online\n");
(i|QX&aE zJ z } else { f"CIM4R)`T\ T
print("$user users online\n"); *u&@I)wf6@K
} [/code][/color][/td][/tr][/table]jgL!q[

$}] X?7pjC H [color=#000000]最终把上面代码写成一个PHP文件如下。[/color]
2OYD
Kucsp U [table=95%][tr][td][color=#000000][code]
|V I MK <?php
;rqAv{6TI //Put your basic server info here
WRCH.Q.ZUT $server = "localhost"; //normally localhost
N4l-~3Q Di $db_user = "root"; //your MySQL(和PHP搭配之最佳组合) database username OS#r3BF v
$db_pass = "password"; //your MySQL(和PHP搭配之最佳组合) database password
&TC BK9TX&_'M $database = "users";
;D$m3Vp#V;A $timeoutseconds = 300; //it will delete all people which haven't refreshed(so probbably are
*{x2| |-e b&x // offline or inactive) in $timieoutseconds time (so it actually checks the people that are active in the last `@0w je7]0x
// $timeoutseconds seconds)
"L2S9KT*DPS+~J //this is where PHP gets the time

uUfeRn)r |$c E $timestamp = time(); AYu+npC+t
//counts the timeout, all people which have been seen last online in earlier than this timestamp, will get removed 4FW:j:A c3fx,pi
$timeout = $timestamp-$timeoutseconds; 5Sy-ZD7lQ3`;X!v
//connect to database +wf4VNm9@.c3P:w
MySQL(和PHP搭配之最佳组合)_connect($server, $db_user);
'v{$u)hK[SA)i C:U3D //add the timestamp from the user to the online list
5I`8seBP.n P $insert = MySQL(和PHP搭配之最佳组合)_db_query($database, "INSERT INTO useronline VALUES
sv@f
c9A(ZQ,B ('$timestamp','".$_SERVER['REMOTE_ADDR']."','".$_SERVER['PHP_SELF']."')"); B}K*Fd;}
if(!($insert)) {
X+m!p p(Z:[lY"} print "Useronline Insert Failed > ";
^6s#\(~!y }
"A:S Bjv%bi //delete the peoples which haven't been online/active in the last $timeoutseconds seconds. #A@c5] F'\wg
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$delete = MySQL(和PHP搭配之最佳组合)_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout"); +W IB:?BP!{
if(!($delete)) { !H/O_!T4h
print "Useronline Delete Failed > "; Tb8j
R0R'u(~*|/z1~
}
)p I#o7Mg`&M6xp //select the amount of people online, all uniques, which are online on THIS page /cd"W:Z3j3n1H
$result = MySQL(和PHP搭配之最佳组合)_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='".$_SERVER['PHP_SELF']."' "); [U b$pay
if(!($result)) { 5E![,z.lr&jUv9G
print "Useronline Select Error > ";
qCJ"|@:G g T }
4L#]9t-C'S#Y:N3l //Count the number of rows = the number of people online G?W[5lPuR!`
$user = MySQL(和PHP搭配之最佳组合)_num_rows($result); wA&GM
}'E$uL,Y
//spit out the results
X,Y!e\MY{ `n MySQL(和PHP搭配之最佳组合)_close();
'u6nnQT#UK7K if($user == 1) {
-Jg(zg:t1b print("1 user online\n"); #k:W7oE-l9k
} else { a!v5AHM
print("$user users online\n");
.~"Y4@_ ^ }
#DWaPl v ?> U UZM7P A7}
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