管理员
   
论坛积分
分
威望 点
贡献值 个
金币 枚
|
index.php& n( x9 B$ Z" j% n2 h7 ~/ |
- <?php" r5 {9 a4 i! @9 Y: [, @
- session_start();
) X0 v8 h6 o4 k2 j+ g - // 丢弃输出缓冲区的内容 **
( s | d. W5 b4 Z - ob_clean();9 |3 U$ _8 s& d5 g0 E o6 _
- header ('Content-Type: image/png');' ~1 a. |3 r* p/ I# z
- // 1 创建画布
5 L* T1 d) Q9 w" w- a - $image=imagecreatetruecolor(100, 30);: t! w- w% n" s" W6 r0 F, W6 q; T
- // 2 画一个矩形并填充背景颜色为白色
+ ^8 S% P+ B- p& X( _ - $color=imagecolorallocate($image, 255, 255, 255);
" n! V1 U( C+ d3 ]. m - imagefill($image, 20, 20, $color);% n/ V: m, e! r& a1 Q6 [
- // for($i=0;$i<4;$i++){
! E/ n8 w) m& u8 Y - // $font=6;1 ?9 B$ k1 O9 H* J' O# H8 W8 z
- // $x=rand(5,10)+$i*100/4;+ |, E7 X+ y* [) H4 B4 Y0 z# h
- // $y=rand(8, 15);
' p4 D1 u, T1 D @+ t - // $string=rand(0, 9);. Z7 m) g/ z% q5 y7 Q0 p
- // $color=imagecolorallocate($image, rand(0,120), rand(0,120), rand(0,120));' [; K$ h1 F! K; ?
- // imagestring($image, $font, $x, $y, $string, $color);1 j l: n3 \* C
- // }1 ~9 m: j6 ~4 R7 d5 W
- $code='';
6 N* f' M, [ C8 F1 e L - for($i=0;$i<4;$i++){
# \* k% E& d1 M9 k0 I - $fontSize=8;
) H5 e! r3 `% t - $x=rand(5,10)+$i*100/4;5 h! J6 N; D2 z
- $y=rand(5, 15);) K8 f9 Z$ }8 C' D7 |
- $data='abcdefghijklmnopqrstuvwxyz123456789ABCDEFGHJKLMNPQRTUVWXYZ';
0 _3 d( G3 `: P - $string=substr($data,rand(0, strlen($data)),1);
& J# h; R1 {2 N/ [! p" ~* x - $code.=$string;+ v( n$ E) Y3 ?) k& t- s
- // 3.2 加载自定义字体
3 H% C' A' }" t( J5 A3 q& N0 T - $font_file = '1.ttf';
8 k N8 _* i. C# | - $color=imagecolorallocate($image,rand(0,120), rand(0,120), rand(0,120));6 ]9 z" }8 }8 u5 m3 y
- // 把文字填充到画布
" o6 s9 j W5 Z8 R - //imagefttext($image, 10, mt_rand(-5, 10), $x, $y, $color, $font_file, $string);% L6 l3 Z9 u2 Q, t
- imagestring($image, $fontSize, $x, $y, $string, $color);
! x5 O' w( o; X6 | - }
$ L0 b# S2 j, r$ X. R0 L6 ~) Q - $_SESSION['code']=$code;//存储在session里5 y4 L4 q3 Z& u9 t0 r% Y
- for($i=0;$i<200;$i++){8 Y0 H1 z3 s% R3 C2 ~6 i
- $pointColor=imagecolorallocate($image, rand(100, 255), mt_rand(100, 255), rand(100, 255));
4 ?9 e+ ]0 I' d- K. F7 z, l - imagesetpixel($image, mt_rand(0, 100), rand(0, 30), $pointColor);
& R9 [5 x6 J7 q: k3 X - }* Z$ a8 r' c: O9 X# d
- for($i=0;$i<2;$i++){% w$ {7 F- N8 ]) w- E
- $linePoint=imagecolorallocate($image, rand(150, 255), rand(150, 255), rand(150, 255));2 H- K u0 Y; n9 O( `* Q/ V9 U
- imageline($image, rand(10, 50), rand(10, 20), rand(80,90), rand(15, 25), $linePoint);5 M, P3 q5 @, |( Q( x! u
- }/ R4 j( y7 i7 k: w
- imagepng($image);' C. B9 W8 e) u8 ^+ ^8 k$ h! M
- imagedestroy($image);
8 I3 y/ M" B) p; d8 s( r/ X; _+ N - ) N* b$ G. b) ?3 Q4 s& S8 |) @* ]
- ?>
复制代码 6 c0 A7 x F' E1 r7 _5 E+ n" d
form.php d- d) A; W# Z) M( G. y
- <?php
% p3 F |- ?2 s2 u& y" C - if(isset($_REQUEST['code'])){- c8 a4 a; v$ O9 K3 R$ X( g
- session_start();; f0 _& f# z# ]( Q
- if($_REQUEST['code']==$_SESSION['code']){; ^/ K- k, l% I9 }( ^( H
- echo "<font color='red'>输入正确</font>";, `0 P6 R) e( z0 d
- }else{/ N9 D; A. j4 D( I" L8 Q# U
- echo "<font color='red'>输入错误</font>";/ F; B- t J# z2 \5 t% h, v
- }
) d- H( U8 E6 t& r& k5 x$ F* n. B - }
8 C6 l; ]5 a0 B, O' L8 l2 r! Z1 T - ?>
1 S9 n/ N- _- |- F; m - <!DOCTYPE html>
0 X+ b$ O; N. g8 V - <html>
1 c2 |+ z0 ^" X2 G+ \ - <head>
: C- @% C7 Y+ O' [6 y3 k - <meta chartset="UTF-8" />
+ ^; l3 S' N1 a/ C! x/ H! | - <style type="text/css" rel="stylesheet">
, ^& L L' O7 U1 y8 i- q* K - a{0 `5 N3 |' p, ]7 ? A; U
- text-decoration:none;
! W' R0 v8 w- C1 @ - font-size:30px;
0 N2 T$ t" }. Z1 f3 Z7 O - color:blue;/ t. H6 e6 ]$ g; ?4 u$ G* }. H' I
- }
* A% d8 l% ~9 a/ B2 z0 R - a:hover{. M' u" c$ b) Q! E" d9 u9 h1 v
- text-decoration:underline;
+ y4 d' Z7 w. C4 D! J - }' o" [: L& P+ f! [# u+ n6 O
- </style>. `& M7 G7 `& t3 W( N
- </head>$ u1 Z1 Q! g( n' o8 A7 U
- <body>" h3 _( x7 _8 S' `* P( I; H% w! S
- <form action="form.php" method="get"># E; v9 _9 m$ _& A$ B, ]# R. u
- 验证码: <img id="img" src="index.php?" onclick="changeCode()"/>0 _& r4 l/ q1 V5 S; O6 U" j
- <a href="javascript:void(0)" onclick="changeCode()">看不清?</a> <br />
8 x6 j: n4 m) F; W: Q - 请输入验证码: <input name="code" /><br />+ e8 h& A0 f. b- [8 T( x
- <input type="submit" value="提交" />: J5 p$ z$ F) d* S
- </form>- p. s" G# N1 F7 ^; Y
- </body>$ r8 W; z0 r' U
- <script type="text/javascript">
2 f, U V% Y* v: c7 j4 p3 V. O -
# |! W! f5 P% u( v# C% u$ w - function changeCode(){% Q( P3 d4 h1 u' n
- var img=document.getElementById('img');6 q Q1 H1 {2 U) l% e( t6 p/ D
- //img.src='index.php?r='+Math.random();) r5 m" o+ @+ j1 j9 }: g" s
- img.setAttribute('src','index.php?r='+Math.random());
' f. t+ g( G# {2 c4 h0 t) X* p - }
9 w9 k# \3 }( k - </script>8 q& b$ f, g9 O9 J& k; b
- </html>
复制代码
! f8 }8 o! _. D2 C8 c
. V1 ^! H/ o" k8 B* @ |
|