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php拼图验证码,旋转拼图验证码

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php的图片验证码代码

这个是phpcms的验证码,经过十几万个网站经验的,非常好用

?php

session_start();

$enablegd = 1;

//判断图像处理函数是否存在

$funcs = array('imagecreatetruecolor','imagecolorallocate','imagefill','imagestring','imageline','imagerotate','imagedestroy','imagecolorallocatealpha','imageellipse','imagepng');

foreach($funcs as $func)

{

if(!function_exists($func))

{

$enablegd = 0;

break;

}

}

ob_clean(); //清理缓冲

if($enablegd)

{

//create captcha

$consts = 'cdfgkmnpqrstwxyz23456';

$vowels = 'aek23456789';

for ($x = 0; $x 6; $x++)

{

$const[$x] = substr($consts, mt_rand(0,strlen($consts)-1),1); //获取$consts中的一个随机数

$vow[$x] = substr($vowels, mt_rand(0,strlen($vowels)-1),1); //获取$vowels中的一个随机数

}

$radomstring = $const[0] . $vow[0] .$const[2] . $const[1] . $vow[1] . $const[3] . $vow[3] . $const[4];

$_SESSION['checkcode'] = $string = substr($radomstring,0,4); //显示4个字符

$imageX = strlen($radomstring)*8; //图像的宽

$imageY = 20; //图像的高

$im = imagecreatetruecolor($imageX,$imageY); //新建一个真彩色图像

//creates two variables to store color

$background = imagecolorallocate($im, rand(180, 250), rand(180, 250), rand(180, 250)); //背景色

$foregroundArr = array(imagecolorallocate($im, rand(0, 20), rand(0, 20), rand(0, 20)),

imagecolorallocate($im, rand(0, 20), rand(0, 10), rand(245, 255)),

imagecolorallocate($im, rand(245, 255), rand(0, 20), rand(0, 10)),

imagecolorallocate($im, rand(245, 255), rand(0, 20), rand(245, 255))

);

$foreground2 = imagecolorallocatealpha($im, rand(20, 100), rand(20, 100), rand(20, 100),80); //分配颜色并说明透明度

$middleground = imagecolorallocate($im, rand(200, 160), rand(200, 160), rand(200, 160)); //中间背景

$middleground2 = imagecolorallocatealpha($im, rand(180, 140), rand(180, 140), rand(180, 140),80); //中间背景2

//与左上角的颜色相同的都会被填充

imagefill($im, 0, 0, imagecolorallocate($im, 250, 253, 254));

//往图像上写入文字

imagettftext($im, 12, rand(30, -30), 5, rand(14, 16), $foregroundArr[rand(0,3)], XINCHENG_ROOT.'include/fonts/ALGER.TTF', $string[0]);

imagettftext($im, 12, rand(50, -50), 20, rand(14, 16), $foregroundArr[rand(0,3)], XINCHENG_ROOT.'include/fonts/ARIALNI.TTF', $string[1]);

imagettftext($im, 12, rand(50, -50), 35, rand(14, 16), $foregroundArr[rand(0,3)], XINCHENG_ROOT.'include/fonts/ALGER.TTF', $string[2]);

imagettftext($im, 12, rand(30, -30), 50, rand(14, 16), $foregroundArr[rand(0,3)], XINCHENG_ROOT.'include/fonts/arial.ttf', $string[3]);

//画边框

$border = imagecolorallocate($im, 133, 153, 193);

imagerectangle($im, 0, 0, $imageX - 1, $imageY - 1, $border);

//画一些随机出现的点

$pointcol = imagecolorallocate($im, rand(0,255), rand(0,255), rand(0,255));

for ($i=0;$i80;$i++)

{

imagesetpixel($im,rand(2,$imageX-2),rand(2,$imageX-2),$pointcol);

}

//画随机出现的线

for ($x=0; $x9;$x++)

{

if(mt_rand(0,$x)%2==0)

{

imageline($im, rand(0, 120), rand(0, 120), rand(0, 120), rand(0, 120), rand(0, 999999)); //画线

imageellipse($im, rand(0, 120), rand(0, 120), rand(0, 120), rand(0, 120), $middleground2); //画椭圆

}

else

{

imageline($im, rand(0, 120), rand(0, 120), rand(0, 120), rand(0, 120), rand(0, 999999));

imageellipse($im, rand(0, 120), rand(0, 120), rand(0, 120), rand(0, 120), $middleground);

}

}

//output to browser

header("content-type:image/png\r\n");

imagepng($im);

imagedestroy($im);

}

else

{

$files = glob(XINCHENG_ROOT.'images/checkcode/*.jpg');

if(!is_array($files)) die('请检查文件目录完整性:/images/checkcode/');

$checkcodefile = $files[rand(0, count($files)-1)]; //随机其中一个文件

$_SESSION['checkcode'] = substr(basename($checkcodefile), 0, 4); //获得文件名

header("content-type:image/jpeg\r\n");

include $checkcodefile;

}

?

PHP滑动拼图验证码的图片是怎样生成的

1 如果放在项目中用,验证码图片希望可以是接口返回。ImageView以及其子类支持花式加载图片。

2 继承自ImageView,绘制图片本身不用我们干预,也不用我们操心scaleType,节省很多工作。

* 在onSizeChanged()方法中生成 和 控件宽高相关的属性值:

1 初始化时随机生成验证码区域起点

2 生成验证码区域Path

3 生成滑块Bitmap

* onDraw()时,依次绘制:

1 验证码阴影

2 滑块

php图片验证码实现

可以用php的GD库做

//随机生成验证码

class randomString

{

function createRandomStr($strLen)

{

list($usec, $sec) = explode(' ', microtime());

(float) $sec + ((float) $usec * 100000);

$number = '';

$number_len = $strLen;

$stuff = '1234567890abcdefghijklmnopqrstuvwxyz';//附加码显示范围ABCDEFGHIJKLMNOPQRSTUVWXYZ

$stuff_len = strlen($stuff) - 1;

for ($i = 0; $i $number_len; $i++) {

$number .= substr($stuff, mt_rand(0, $stuff_len), 1);

}

return $number;

}

}

通过ZD库将验证码变成图片

$number = $createStr-createRandomStr('4');//验证码的位数

$number_len = strlen($number);

$_SESSION["VERIFY_CODE"] = $number;

// 生成验证码图片

$img_width = 60;

$img_height = 20;

$img = imageCreate($img_width, $img_height);

ImageColorAllocate($img, 0x6C, 0x74, 0x70);

$white = ImageColorAllocate($img, 0xff, 0xff, 0xff);

$ix = 6;

$iy = 2;

for ($i = 0; $i $number_len; $i++) {

imageString($img, 5, $ix, $iy, $number[$i], $white);

$ix += 14;

}

for($i=0;$i200;$i++) //加入干扰象素

{

$randcolor = ImageColorallocate($img,rand(0,255),rand(0,255),rand(0,255));

imagesetpixel($img, rand()%100 , rand()%50 , $randcolor);

}

// 输出图片

header("Content-type: " . image_type_to_mime_type(IMAGETYPE_PNG));

imagepng($img);

imagedestroy($img);