取得客戶端的IP,$_SERVER["REMOTE_ADDR"]* I0 x: `" M& P/ Q1 }0 _& W
IP不在範圍不給訪問。( S/ M7 l% }, [5 h3 u g
答2:+ h# L7 _/ [* N* Y, z
限制某個頁面,用樓上的方法.! z: ]6 x/ R3 H j& T
if(eregi("^192.168.0.",$_SERVER['REMOTE_ADDR'])){
/ }" ?% e4 |" w) c echo "可以訪問";
& X4 k/ |" v9 j" ?3 }9 i- H' }) |} else {1 f5 U6 E/ a0 E% Y3 P
echo "拒絕訪問";
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----------------
# S2 n2 }/ r/ ?- \7 ?8 b* z限制整個網站(apache服務器)在httpd.conf中:% o) Q, ^& v( S! l$ p
deny from all
9 P+ @) C1 h+ m3 ]1 A2 O. v: Yallow from 192.168.0.x, |2 _& Z' T" _3 v( y
答3:
* O6 r& C4 v/ h4 R5 y/ T' Hif(eregi("^192.168.0.",$_SERVER['REMOTE_ADDR'])){
1 `7 Z% ?" o) W, o8 f3 \* N4 m===>if(eregi("^192\.168\.0\.",$_SERVER['REMOTE_ADDR'])){
3 `" q3 E: I5 v" F6 T答4:
0 Y: k# v2 R7 a( [; q/ bfunction getip()
; U8 i+ o/ E6 ~{
# P: x7 m& N5 m8 Y if(getenv('HTTP_CLIENT_IP'))
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$onlineip = getenv('HTTP_CLIENT_IP');- c( \$ q$ \; p3 V4 D+ D2 k* a
} # Q4 z9 t- H; `: B+ j
elseif(getenv('HTTP_X_FORWARDED_FOR')) ' N$ p/ Q+ ? t9 K
{
" B( _! y6 r% m5 t8 Y0 q9 @" g $onlineip = getenv('HTTP_X_FORWARDED_FOR');) r) X, m& a& V2 {) i; T
}
/ P$ w; M; v! H7 n4 w3 W elseif(getenv('REMOTE_ADDR')) 9 Q* g3 C' n3 l5 n8 Q
{ ~# |1 v* R* H1 ] i6 J! f
$onlineip = getenv('REMOTE_ADDR');
: D% t' Y" j' X$ r }
" N& @* T/ V4 \ else ! e+ f% H ]+ x* g' f
{
5 u! r+ }' y4 V, _ $onlineip = $HTTP_SERVER_VARS['REMOTE_ADDR'];& o N8 M" I* c. y, s
}
! [- y' }4 z, L9 Z) ~: f: C return $onlineip;
* L& i# @7 {- U, I( e- w) {/ n}
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function estop($ips)7 G. K3 {( a" S1 U, C
{ 9 ?* g# W$ i2 c! j9 j- D4 l Z
global $db;
! i5 V9 F* W! J0 o $ip = explode('.',$ips);
2 Y6 ~9 P$ o; c $sql = "select * from ipestop";
* Z- p* u" ]0 I A* `' h $db->query($sql);
$ O2 w& n! L% F/ ? while ($banned = $db->records())0 v2 w! g3 s4 _3 c) J% C. K
{
( y6 ^* F7 L* ]* H& q/ G% B4 z6 s $exists = 0;
- _. r9 w: U1 f! U for($i = 1; $i <= 4; $i++)
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if($banned["ip$i"] == -1)
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$exists++;# l7 T% B; A/ g$ j4 D/ h: z
} % l& g: R; j3 H, p$ x: A
elseif($banned["ip$i"] == $ip[$i-1]) 6 l- a5 U9 k$ U% a" T/ n
{! _; U) y; `+ x. T% p
$exists++;
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}: |! x( \6 v* S
if($exists == 4)
$ E1 ~) p' ?# g8 _' T$ P/ m {
0 n/ `% p, @) n( X$ J8 | die("該IP 已經被禁止訪問!");
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表結構:
/ _2 v$ W% I: C+ TCREATE TABLE ipestop(
# g# R) b8 F- d6 ]* E id smallint(6) unsigned NOT NULL auto_increment,7 g" H' k9 E$ E# |; j5 r
ip1 smallint(3) NOT NULL default '0',
3 A( W3 h6 j5 b% L; q ip2 smallint(3) NOT NULL default '0',6 ~/ r/ d+ w/ z0 f. i _) p- a0 i
ip3 smallint(3) NOT NULL default '0',
T' V- I/ I/ U1 o1 F- [0 F: W ip4 smallint(3) NOT NULL default '0'," Y+ i5 [0 ~- G% S4 g' ?
PRIMARY KEY (id),5 J T% Y5 a' P, I
KEY ip1 (ip1),
/ b. n. N E5 M) c8 N+ B KEY ip2 (ip2),
, O2 l9 R' H5 l* m% d! a KEY ip3 (ip3),+ S0 P; Y F8 z' g# y
KEY ip4 (ip1)) f9 a' h+ D9 O K9 a$ l8 f
) TYPE=MyISAM; |