<?phpif($id!="submit"){ //提交前
$val_ar=array(A,B,C,D,E,F,G,H,I,G,K,L,M,N,O,P,Q,U,V,W,X,I,Z,1,2,3,4,5,6,7,8,9,0); //给数组赋值
srand((double)microtime()*10000000); //配置随机种子
shuffle($val_ar); //打乱数组顺序
$i=0;
while($i<4) { //得到随机数
$vnum.=$val_ar[$i++];
}
echo $vnum;
for($i=0;$i<10;$i++) { //图片名称数组赋值
$vpic[]="images/".$i.".gif";
}
//以下是表单代码
$formstr="<form name=\"myform\" method=\"post\" action=\"$php_self?id=submit\"> <p>验证码: <input style=\"border:1px solid #ff0000;\" type=\"text\" name=\"valtxt\" size=\"6\" value=\"\"> <input style=\"width:0px;height:0px;border:0px;\" type=\"text\" name=\"validate\" size=\"4\" value=\"$vnum\">";
for($i=0;$i<4;$i++) { //验证码图片配置
$idx=$val_ar[$i];
$picstr.="<img width=\"12\" height=\"12\" border=\"0\" src=\"$vpic[$idx]\">";
}
$formstr.=$picstr."</p><p><input type=\"submit\" value=\" 提交 \" name=\"btn1\"></p></form>";
print $formstr;}else{ //提交后 $valtxt==$validate?print "验证通过":print "验证码错误!";}
$val_ar=array(A,B,C,D,E,F,G,H,I,G,K,L,M,N,O,P,Q,U,V,W,X,I,Z,1,2,3,4,5,6,7,8,9,0); //给数组赋值
srand((double)microtime()*10000000); //配置随机种子
shuffle($val_ar); //打乱数组顺序
$i=0;
while($i<4) { //得到随机数
$vnum.=$val_ar[$i++];
}
echo $vnum;
for($i=0;$i<10;$i++) { //图片名称数组赋值
$vpic[]="images/".$i.".gif";
}
//以下是表单代码
$formstr="<form name=\"myform\" method=\"post\" action=\"$php_self?id=submit\"> <p>验证码: <input style=\"border:1px solid #ff0000;\" type=\"text\" name=\"valtxt\" size=\"6\" value=\"\"> <input style=\"width:0px;height:0px;border:0px;\" type=\"text\" name=\"validate\" size=\"4\" value=\"$vnum\">";
for($i=0;$i<4;$i++) { //验证码图片配置
$idx=$val_ar[$i];
$picstr.="<img width=\"12\" height=\"12\" border=\"0\" src=\"$vpic[$idx]\">";
}
$formstr.=$picstr."</p><p><input type=\"submit\" value=\" 提交 \" name=\"btn1\"></p></form>";
print $formstr;}else{ //提交后 $valtxt==$validate?print "验证通过":print "验证码错误!";}
<?PHP
error_reporting(0);
session_start();
session_register('code');
$_SESSION['code'] = '';
$width = '58';//图片宽
$height = '22';//图片高$textall = array_merge_recursive(range('0','9'));
for ($i=0; $i<4; $i++) {
$tmptext=rand(0, 9);
$randtext = $textall[$tmptext];
$code .= $randtext;
}$_SESSION['code'] = $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;
}?>