seccode.php
<?php
error_reporting(0);
require(__DIR__ . "/config.php");
session_start();
//session_register('VerificationCode');
$_SESSION[PREFIX . 'VerificationCode'] = '';
$width = '60'; //图片宽
$height = '30'; //图片高
$textall = array_merge_recursive(range('0', '9'));
$code = '';
for ($i = 0; $i < 4; $i++) {
$tmptext = mt_rand(0, 9);
$randtext = $textall[$tmptext];
$code .= $randtext;
}
$_SESSION[PREFIX . 'VerificationCode'] = $code;
header("Expires: -1");
header("Cache-Control: no-store, private, post-check=0, pre-check=0, max-age=0", FALSE);
header("Pragma: no-cache");
if (function_exists('imagecreate') && function_exists('imagecolorset') && function_exists('imagecopyresized') && function_exists('imagecolorallocate') && function_exists('imagesetpixel') && function_exists('imagechar') && function_exists('imagecreatefromgif') && function_exists('imagepng')) {
$im = imagecreate($width, $height);
$backgroundcolor = imagecolorallocate($im, 255, 255, 255);
$numorder = array(
1,
2,
3,
4
);
shuffle($numorder);
$numorder = array_flip($numorder);
for ($i = 1; $i <= 4; $i++) {
$x = $numorder[$i] * 13 + mt_rand(0, 4) - 2;
$y = mt_rand(0, 3);
$text_color = imagecolorallocate($im, mt_rand(50, 255), mt_rand(50, 128), mt_rand(50, 255));
imagechar($im, 5, $x + 5, $y + 3, $code[$numorder[$i]], $text_color);
}
$linenums = mt_rand(10, 32);
for ($i = 0; $i <= $linenums; $i++) {
$linecolor = imagecolorallocate($im, mt_rand(0, 255), mt_rand(0, 255), mt_rand(0, 255));
$linex = mt_rand(0, $width);
$liney = mt_rand(0, $height);
imageline($im, $linex, $liney, $linex + mt_rand(0, 4) - 2, $liney + mt_rand(0, 4) - 2, $linecolor);
}
for ($i = 0; $i <= 40; $i++) {
$pointcolor = imagecolorallocate($im, mt_rand(50, 255), mt_rand(50, 255), mt_rand(50, 255));
imagesetpixel($im, mt_rand(0, $width), mt_rand(0, $height), $pointcolor);
}
$bordercolor = imagecolorallocate($im, 150, 150, 150);
imagerectangle($im, 0, 0, $width - 1, $height - 1, $bordercolor);
header('Content-type: image/png');
imagepng($im);
imagedestroy($im);
} else {
$numbers = array(
0 => array(
'3c',
'66',
'66',
'66',
'66',
'66',
'66',
'66',
'66',
'3c'
),
1 => array(
'1c',
'0c',
'0c',
'0c',
'0c',
'0c',
'0c',
'0c',
'1c',
'0c'
),
2 => array(
'7e',
'60',
'60',
'30',
'18',
'0c',
'06',
'06',
'66',
'3c'
),
3 => array(
'3c',
'66',
'06',
'06',
'06',
'1c',
'06',
'06',
'66',
'3c'
),
4 => array(
'1e',
'0c',
'7e',
'4c',
'2c',
'2c',
'1c',
'1c',
'0c',
'0c'
),
5 => array(
'3c',
'66',
'06',
'06',
'06',
'7c',
'60',
'60',
'60',
'7e'
),
6 => array(
'3c',
'66',
'66',
'66',
'66',
'7c',
'60',
'60',
'30',
'1c'
),
7 => array(
'30',
'30',
'18',
'18',
'0c',
'0c',
'06',
'06',
'66',
'7e'
),
8 => array(
'3c',
'66',
'66',
'66',
'66',
'3c',
'66',
'66',
'66',
'3c'
),
9 => array(
'38',
'0c',
'06',
'06',
'3e',
'66',
'66',
'66',
'66',
'3c'
)
);
for ($i = 0; $i < 10; $i++) {
for ($j = 0; $j < 6; $j++) {
$a1 = substr('012', mt_rand(0, 2), 1) . substr('012345', mt_rand(0, 5), 1);
$a2 = substr('012345', mt_rand(0, 5), 1) . substr('0123', mt_rand(0, 3), 1);
mt_rand(0, 1) == 1 ? array_push($numbers[$i], $a1) : array_unshift($numbers[$i], $a1);
mt_rand(0, 1) == 0 ? array_push($numbers[$i], $a1) : array_unshift($numbers[$i], $a2);
}
}
$bitmap = array();
for ($i = 0; $i < 20; $i++) {
for ($j = 0; $j < 4; $j++) {
$n = substr($code, $j, 1);
$bytes = $numbers[$n][$i];
$a = mt_rand(0, 14);
switch ($a) {
case 1:
str_replace('9', '8', $bytes);
break;
case 3:
str_replace('c', 'e', $bytes);
break;
case 6:
str_replace('3', 'b', $bytes);
break;
case 8:
str_replace('8', '9', $bytes);
break;
case 0:
str_replace('e', 'f', $bytes);
break;
}
array_push($bitmap, $bytes);
}
}
for ($i = 0; $i < 8; $i++) {
$a = substr('012', mt_rand(0, 2), 1) . substr('012345', mt_rand(0, 5), 1);
array_unshift($bitmap, $a);
array_push($bitmap, $a);
}
$image = pack('H*', '424d9e000000000000003e000000280000002000000018000000010001000000' . '0000600000000000000000000000000000000000000000000000FFFFFF00' . implode('', $bitmap));
header('Content-Type: image/bmp');
echo $image;
}