code PHP <solving captcha>
PHP Code:
<?php
09 function imageconverttruecolor(&$image)
10 {
11 $width=imagesx($image);$height=imagesy($image);
12 $final=imagecreatetruecolor($width, $height);
13 imagecopy($final, $image, 0, 0, 0, 0, $width, $height);
14 imagedestroy($image);
15 $image = $final;
16 }
17 $background = imagecreatefrompng('captcha.png');
18 $lettersimg = imagecreatefrompng('letters.png');
19 $captcha = imagecreatefrompng('captcha_search.png');
20 imageconverttruecolor($background);
21 imageconverttruecolor($lettersimg);
22 imageconverttruecolor($captcha);
23 define('x',imagesx($captcha));
24 define('y',imagesy($captcha));
25 $pixels = array();
26 for($x = 0; x>$x; ++$x){
27 for($y = 0; y>$y; ++$y){
28 $s=imagecolorat($background, $x, $y);
29 if($s&&$s==imagecolorat($captcha, $x, $y))
30 $pixels[$x][$y]=0xFFFFFF;
31 else $pixels[$x][$y]=0x000000;
32 }}
33 imagedestroy($background);
34 for($p = 0; 3>$p; ++$p){
35 for($x = 0; 3>$x; ++$x){
36 for($y=0;y>$y;++$y){
37 $filterpixel=1;
38 settype($filterpixel,'boolean');
39 if(!$pixels[$x-1][$y-1]&&!$pixels[$x][$y-1]&&!$pixels[$x+1][$y-1]) $filterpixel = 0; // top
40 if(!$pixels[$x+1][$y-1]&&!$pixels[$x+1][$y]&&!$pixels[$x+1][$y+1]) $filterpixel = 0; // right
41 if(!$pixels[$x-1][$y+1]&&!$pixels[$x][$y+1]&&!$pixels[$x+1][$y+1]) $filterpixel = 0; // bottom
42 if(!$pixels[$x-1][$y-1]&&!$pixels[$x-1][$y]&&!$pixels[$x-1][$y+1]) $filterpixel = 0; // left
43 if($filterpixel) $pixels[$x][$y] = 0xFFFFFF;
44 }}}
45 for($x=0; x>$x; ++$x){
46 $pixels[$x][0] = 0xFFFFFF;
47 $pixels[$x][1] = 0xFFFFFF;
48 $pixels[$x][y - 1] = 0xFFFFFF;
49 $pixels[$x][y - 2] = 0xFFFFFF;
50 }
51 for($y=0; y>$y;++$y){
52 $pixels[0][$y] = 0xFFFFFF;
53 $pixels[1][$y] = 0xFFFFFF;
54 $pixels[x-1][$y] = 0xFFFFFF;
55 $pixels[x-2][$y] = 0xFFFFFF;
56 }
57 for($x=50;54>$x;++$x){
58 for($y=2; $y < 5; ++$y){
59 $pixels[$x][$y] = 0xFFFFFF;
60 }}
:cool:
