code_gg.php · yiihub/ImageVerifyCode

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ImageVerifyCode

code_gg.php

code_gg.php 2.64 KB

<?php

function getAuthImage($text) {
 $im_x = 160;
 $im_y = 40;
 $im = imagecreatetruecolor($im_x, $im_y);
 $text_c = ImageColorAllocate($im, mt_rand(0, 100), mt_rand(0, 100), mt_rand(0, 100));
 $tmpC0 = mt_rand(100, 255);
 $tmpC1 = mt_rand(100, 255);
 $tmpC2 = mt_rand(100, 255);
 $buttum_c = ImageColorAllocate($im, $tmpC0, $tmpC1, $tmpC2);
 imagefill($im, 16, 13, $buttum_c);

$font = 'airbusspecial.ttf';

for ($i = 0; $i < strlen($text); $i++) {
 $tmp = substr($text, $i, 1);
 $array = array(-1, 1);
 $p = array_rand($array);
 $an = $array[$p] * mt_rand(1, 10); //角度
 $size = 28;
 imagettftext($im, $size, $an, 15 + $i * $size, 35, $text_c, $font, $tmp);
 }

$distortion_im = imagecreatetruecolor($im_x, $im_y);

imagefill($distortion_im, 16, 13, $buttum_c);
 for ($i = 0; $i < $im_x; $i++) {
 for ($j = 0; $j < $im_y; $j++) {
 $rgb = imagecolorat($im, $i, $j);
 if ((int) ($i + 20 + sin($j / $im_y * 2 * M_PI) * 10) <= imagesx($distortion_im) && (int) ($i + 20 + sin($j / $im_y * 2 * M_PI) * 10) >= 0) {
 imagesetpixel($distortion_im, (int) ($i + 10 + sin($j / $im_y * 2 * M_PI - M_PI * 0.1) * 4), $j, $rgb);
 }
 }
 }
 //加入干扰象素;
 $count = 160; //干扰像素的数量
 for ($i = 0; $i < $count; $i++) {
 $randcolor = ImageColorallocate($distortion_im, mt_rand(0, 255), mt_rand(0, 255), mt_rand(0, 255));
 imagesetpixel($distortion_im, mt_rand() % $im_x, mt_rand() % $im_y, $randcolor);
 }

$rand = mt_rand(5, 30);
 $rand1 = mt_rand(15, 25);
 $rand2 = mt_rand(5, 10);
 for ($yy = $rand; $yy <= +$rand + 2; $yy++) {
 for ($px = -80; $px <= 80; $px = $px + 0.1) {
 $x = $px / $rand1;
 if ($x != 0) {
 $y = sin($x);
 }
 $py = $y * $rand2;

imagesetpixel($distortion_im, $px + 80, $py + $yy, $text_c);
 }
 }

//设置文件头;
 Header("Content-type: image/JPEG");

//以PNG格式将图像输出到浏览器或文件;
 ImagePNG($distortion_im);

//销毁一图像,释放与image关联的内存;
 ImageDestroy($distortion_im);
 ImageDestroy($im);
}

function make_rand($length = "32") {//验证码文字生成函数
 $str = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
 $result = "";
 for ($i = 0; $i < $length; $i++) {
 $num[$i] = rand(0, 25);
 $result.=$str[$num[$i]];
 }
 return $result;
}

//输出调用
$checkcode = make_rand(4);
session_start(); //将随机数存入session中
$_SESSION['helloweba_gg'] = strtolower($checkcode);
getAuthImage($checkcode);
?>

Copy Edit Raw Blame History

Reevy authored 2015年05月04日 10:53 +08:00 . initialize commit

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85

<?php

function getAuthImage($text) {
 $im_x = 160;
 $im_y = 40;
 $im = imagecreatetruecolor($im_x, $im_y);
 $text_c = ImageColorAllocate($im, mt_rand(0, 100), mt_rand(0, 100), mt_rand(0, 100));
 $tmpC0 = mt_rand(100, 255);
 $tmpC1 = mt_rand(100, 255);
 $tmpC2 = mt_rand(100, 255);
 $buttum_c = ImageColorAllocate($im, $tmpC0, $tmpC1, $tmpC2);
 imagefill($im, 16, 13, $buttum_c);

 $font = 'airbusspecial.ttf';

 for ($i = 0; $i < strlen($text); $i++) {
 $tmp = substr($text, $i, 1);
 $array = array(-1, 1);
 $p = array_rand($array);
 $an = $array[$p] * mt_rand(1, 10); //角度
 $size = 28;
 imagettftext($im, $size, $an, 15 + $i * $size, 35, $text_c, $font, $tmp);
 }


 $distortion_im = imagecreatetruecolor($im_x, $im_y);

 imagefill($distortion_im, 16, 13, $buttum_c);
 for ($i = 0; $i < $im_x; $i++) {
 for ($j = 0; $j < $im_y; $j++) {
 $rgb = imagecolorat($im, $i, $j);
 if ((int) ($i + 20 + sin($j / $im_y * 2 * M_PI) * 10) <= imagesx($distortion_im) && (int) ($i + 20 + sin($j / $im_y * 2 * M_PI) * 10) >= 0) {
 imagesetpixel($distortion_im, (int) ($i + 10 + sin($j / $im_y * 2 * M_PI - M_PI * 0.1) * 4), $j, $rgb);
 }
 }
 }
 //加入干扰象素;
 $count = 160; //干扰像素的数量
 for ($i = 0; $i < $count; $i++) {
 $randcolor = ImageColorallocate($distortion_im, mt_rand(0, 255), mt_rand(0, 255), mt_rand(0, 255));
 imagesetpixel($distortion_im, mt_rand() % $im_x, mt_rand() % $im_y, $randcolor);
 }

 $rand = mt_rand(5, 30);
 $rand1 = mt_rand(15, 25);
 $rand2 = mt_rand(5, 10);
 for ($yy = $rand; $yy <= +$rand + 2; $yy++) {
 for ($px = -80; $px <= 80; $px = $px + 0.1) {
 $x = $px / $rand1;
 if ($x != 0) {
 $y = sin($x);
 }
 $py = $y * $rand2;

 imagesetpixel($distortion_im, $px + 80, $py + $yy, $text_c);
 }
 }

 //设置文件头;
 Header("Content-type: image/JPEG");

 //以PNG格式将图像输出到浏览器或文件;
 ImagePNG($distortion_im);

 //销毁一图像,释放与image关联的内存;
 ImageDestroy($distortion_im);
 ImageDestroy($im);
}

function make_rand($length = "32") {//验证码文字生成函数
 $str = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
 $result = "";
 for ($i = 0; $i < $length; $i++) {
 $num[$i] = rand(0, 25);
 $result.=$str[$num[$i]];
 }
 return $result;
}

//输出调用
$checkcode = make_rand(4);
session_start(); //将随机数存入session中
$_SESSION['helloweba_gg'] = strtolower($checkcode);
getAuthImage($checkcode);
?>