Revision 152
Added by ryan about 20 years ago
| trunk/wb/include/captcha.php | ||
|---|---|---|
| 33 | 33 |
*/ |
| 34 | 34 |
|
| 35 | 35 |
$image = imagecreate(120, 30); |
| 36 |
|
|
| 36 | 37 |
$white = imagecolorallocate($image, 0xFF, 0xFF, 0xFF); |
| 37 | 38 |
$gray = imagecolorallocate($image, 0xC0, 0xC0, 0xC0); |
| 38 | 39 |
$darkgray = imagecolorallocate($image, 0x50, 0x50, 0x50); |
| 40 |
|
|
| 39 | 41 |
srand((double)microtime()*1000000); |
| 42 |
|
|
| 40 | 43 |
for ($i = 0; $i < 30; $i++) {
|
| 41 | 44 |
$x1 = rand(0,120); |
| 42 | 45 |
$y1 = rand(0,30); |
| ... | ... | |
| 44 | 47 |
$y2 = rand(0,30); |
| 45 | 48 |
imageline($image, $x1, $y1, $x2, $y2 , $gray); |
| 46 | 49 |
} |
| 50 |
|
|
| 47 | 51 |
for ($i = 0; $i < 5; $i++) {
|
| 48 | 52 |
$cnum[$i] = rand(0,9); |
| 49 | 53 |
} |
| 54 |
|
|
| 50 | 55 |
for ($i = 0; $i < 5; $i++) {
|
| 51 | 56 |
$fnt = rand(3,5); |
| 52 | 57 |
$x = $x + rand(12 , 20); |
| 53 | 58 |
$y = rand(7 , 12); |
| 54 | 59 |
imagestring($image, $fnt, $x, $y, $cnum[$i] , $darkgray); |
| 55 | 60 |
} |
| 61 |
|
|
| 56 | 62 |
$digit = "$cnum[0]$cnum[1]$cnum[2]$cnum[3]$cnum[4]"; |
| 63 |
|
|
| 64 |
session_start(); |
|
| 65 |
$_SESSION['captcha'] = $digit; |
|
| 66 |
|
|
| 57 | 67 |
header('Content-type: image/png');
|
| 58 | 68 |
imagepng($image); |
| 59 | 69 |
imagedestroy($image); |
Also available in: Unified diff
Updated Captcha code