function generateImage($token)
{
$iFont = 5;
// Font ID
$iSpacing = 2;
// Spacing between characters
$iDisplacement = 5;
// Vertical chracter displacement
// Establish font metric and image size
$iCharWidth = ImageFontWidth($iFont);
$iCharHeight = ImageFontHeight($iFont);
$iWidth = strlen($token) * ($iCharWidth + $iSpacing);
$iHeight = $iCharHeight + 2 * $iDisplacement;
// Create the image
$pic = ImageCreate($iWidth, $iHeight);
// Allocate a background and foreground colour
$col = array('white' => ImageColorAllocate($pic, 255, 255, 255), 'blue' => ImageColorAllocate($pic, 45, 45, 100), 'green' => ImageColorAllocate($pic, 45, 100, 45), 'red' => ImageColorAllocate($pic, 100, 45, 45), 'purple' => ImageColorAllocate($pic, 100, 45, 100), 'grey' => ImageColorAllocate($pic, 225, 225, 225), 'grey2' => ImageColorAllocate($pic, 200, 200, 200));
for ($x = 0; $x < $iWidth; $x += 2) {
for ($y = 0; $y < $iHeight; $y += 2) {
ImageSetPixel($pic, $x, $y, $col['grey']);
}
}
$iX = 1;
for ($i = 0; $i < strlen($token); $i++) {
ImageChar($pic, $iFont - 1, $iX, $iDisplacement - rand(-$iDisplacement, $iDisplacement), $token[$i], $col['grey2']);
$iX += $iCharWidth + $iSpacing;
}
$iX = 2;
$c = array('blue', 'green', 'red', 'purple');
for ($i = 0; $i < strlen($token); $i++) {
$colour = $c[rand(0, count($c) - 1)];
ImageChar($pic, $iFont, $iX, $iDisplacement - rand(-$iDisplacement, $iDisplacement), $token[$i], $col[$colour]);
$iX += $iCharWidth + $iSpacing;
}
for ($x = 1; $x < $iWidth; $x += 4) {
for ($y = 1; $y < $iHeight; $y += 4) {
ImageSetPixel($pic, $x, $y, $col['white']);
}
}
// Draw some lines
for ($i = 0; $i < 4; $i++) {
ImageLine($pic, rand(0, $iWidth / 2), rand(0, $iHeight / 2), rand($iWidth / 2, $iWidth), rand($iHeight / 2, $iHeight), $col['white']);
}
ob_start();
if (function_exists('imagejpeg')) {
ImageJPEG($pic);
} elseif (function_exists('imagepng')) {
ImagePNG($pic);
} else {
ob_end_clean();
return false;
}
$data = ob_get_contents();
ob_end_clean();
ImageDestroy($pic);
return $data;
}
/**
* $IMG_WIDTH = 100; //图像宽度
$IMG_HEIGHT = 23; //图像高度
$SESSION_VDCODE = ''; //Session变量名称
* $operator = '+-'; //运算符
*/
public static function display($IMG_WIDTH = 70, $IMG_HEIGHT = 25, $SESSION_VDCODE = 'vdcode', $operator = '+')
{
$session_id = session_id();
if (empty($session_id)) {
@session_start();
}
$code = array();
$num1 = $code[] = mt_rand(1, 9);
$code[] = '+';
//{mt_rand(0,1)};
$num2 = $code[] = mt_rand(1, 9);
$codestr = implode('', $code);
//eval("\$result = ".implode('',$code).";");
$code[] = '=';
$_SESSION[$SESSION_VDCODE] = (int) $num1 + (int) $num2;
$img = ImageCreate($IMG_WIDTH, $IMG_HEIGHT);
ImageColorAllocate($img, mt_rand(230, 250), mt_rand(230, 250), mt_rand(230, 250));
$color = ImageColorAllocate($img, 0, 0, 0);
$offset = 0;
foreach ($code as $char) {
$offset += 15;
$txtcolor = ImageColorAllocate($img, mt_rand(0, 255), mt_rand(0, 150), mt_rand(0, 255));
ImageChar($img, mt_rand(3, 5), $offset, mt_rand(1, 5), $char, $txtcolor);
}
for ($i = 0; $i < 100; $i++) {
$pxcolor = ImageColorAllocate($img, mt_rand(0, 255), mt_rand(0, 255), mt_rand(0, 255));
ImageSetPixel($img, mt_rand(0, $IMG_WIDTH), mt_rand(0, $IMG_HEIGHT), $pxcolor);
}
header('Content-type: image/png');
ImagePng($img);
exit;
}
public static function make()
{
$sessionvar = 'vdcode';
//Session变量名称
$width = 150;
//图像宽度
$height = 20;
//图像高度
$ans = mt_rand(0, 9);
$p1 = mt_rand(1, 9);
if ($p1 <= $ans) {
$p2 = $ans - $p1;
$operator = '+';
} else {
$p2 = $p1 - $ans;
$operator = '-';
}
$code = array();
$code[] = $p1;
$code[] = $operator;
$code[] = $p2;
$code[] = '=';
$code[] = $ans;
$_SESSION[$sessionvar] = $ans;
$img = ImageCreate($width, $height);
ImageColorAllocate($img, mt_rand(230, 250), mt_rand(230, 250), mt_rand(230, 250));
$color = ImageColorAllocate($img, 0, 0, 0);
$offset = 0;
foreach ($code as $char) {
$offset += 20;
$txtcolor = ImageColorAllocate($img, mt_rand(0, 255), mt_rand(0, 150), mt_rand(0, 255));
ImageChar($img, mt_rand(3, 5), $offset, mt_rand(3, 5), $char, $txtcolor);
}
for ($i = 0; $i < 100; $i++) {
$pxcolor = ImageColorAllocate($img, mt_rand(0, 255), mt_rand(0, 255), mt_rand(0, 255));
ImageSetPixel($img, mt_rand(0, $width), mt_rand(0, $height), $pxcolor);
}
return ImagePng($img);
}
public function getCaptcha()
{
$this->image = ImageCreate($this->width, $this->height);
$bgcolor = ImageColorAllocate($this->image, $this->bgcolor[0], $this->bgcolor[1], $this->bgcolor[2]);
// 背景色
ImageFill($this->image, 0, 0, $bgcolor);
// 填充背景色
// 檢查是否要邊框
if ($this->border) {
$this->makeBorder();
}
// 開始生成
for ($i = 0; $i < $this->quantity; $i++) {
$alpha_or_number = mt_rand(0, 1);
// 隨機取英文或數字
$str = $alpha_or_number ? $this->alpha : $this->number;
$which = mt_rand(0, strlen($str) - 1);
// 取英文或數字位置
$code = substr($str, $which, 1);
// 取英文或數字
$j = !$i ? 4 : $j + 15;
// 字串位置
$color3 = ImageColorAllocate($this->image, $this->fontcolor[0], $this->fontcolor[1], $this->fontcolor[2]);
// 字串顏色
ImageChar($this->image, $this->fontsize, $j, 8, $code, $color3);
// 依序寫入字串
$this->captcha .= $code;
// 生成字串
}
// 檢查是否要進行圖片干擾
if ($this->line) {
$this->mixedLine();
}
$this->CI->load->library('session');
$this->CI->session->set_userdata('captcha', $this->captcha);
return $this->image;
// 輸出
}
srand((double) microtime() * 1000000);
$im = ImageCreate($w, $h);
$bgcolor = ImageColorAllocate($im, 255, 255, 255);
ImageFill($im, 0, 0, $bgcolor);
if ($border) {
$black = ImageColorAllocate($im, 0, 0, 0);
ImageRectangle($im, 0, 0, $w - 1, $h - 1, $black);
}
for ($i = 0; $i < $how; $i++) {
$alpha_or_number = mt_rand(0, 1);
$str = $alpha_or_number ? $alpha : $number;
$which = mt_rand(0, strlen($str) - 1);
$code = substr($str, $which, 1);
$j = !$i ? 4 : $j + 15;
$color3 = ImageColorAllocate($im, mt_rand(0, 100), mt_rand(0, 100), mt_rand(0, 100));
ImageChar($im, $fontsize, $j, 3, $code, $color3);
$randcode .= $code;
}
for ($i = 0; $i < 5; $i++) {
$color1 = ImageColorAllocate($im, mt_rand(0, 255), mt_rand(0, 255), mt_rand(0, 255));
ImageArc($im, mt_rand(-5, $w), mt_rand(-5, $h), mt_rand(20, 300), mt_rand(20, 200), 55, 44, $color1);
}
for ($i = 0; $i < $how * 40; $i++) {
$color2 = ImageColorAllocate($im, mt_rand(0, 255), mt_rand(0, 255), mt_rand(0, 255));
ImageSetPixel($im, mt_rand(0, $w), mt_rand(0, $h), $color2);
}
$_SESSION['randcode'] = $randcode;
Imagegif($im);
ImageDestroy($im);
?>
function show()
{
Header("Content-type: image/gif");
/*
* ��ʼ��
*/
$border = 0;
//�Ƿ�Ҫ�߿� 1Ҫ:0��Ҫ
$how = $this->num;
//��֤��λ��
$w = $this->width;
//ͼƬ���
$h = $this->height;
//ͼƬ�߶�
$fontsize = 5;
//�����С
$alpha = "abcdefghijkmnopqrstuvwxyz";
//��֤������1:��ĸ
$number = "023456789";
//��֤������2:����
$randcode = "";
//��֤���ַ�����ʼ��
srand((double) microtime() * 1000000);
//��ʼ�����������
$im = ImageCreate($w, $h);
//������֤ͼƬ
/*
* ���ƻ������
*/
$bgcolor = ImageColorAllocate($im, 255, 255, 255);
//���ñ�����ɫ
ImageFill($im, 0, 0, $bgcolor);
//��䱳��ɫ
if ($border) {
$black = ImageColorAllocate($im, 0, 0, 0);
//���ñ߿���ɫ
ImageRectangle($im, 0, 0, $w - 1, $h - 1, $black);
//���Ʊ߿�
}
/*
* ��λ��������ַ�
*/
for ($i = 0; $i < $how; $i++) {
$alpha_or_number = mt_rand(0, 1);
//��ĸ��������
$str = $alpha_or_number ? $alpha : $number;
$which = mt_rand(0, strlen($str) - 1);
//ȡ�ĸ��ַ�
$code = substr($str, $which, 1);
//ȡ�ַ�
$j = !$i ? 4 : $j + 15;
//���ַ�λ��
$color3 = ImageColorAllocate($im, mt_rand(0, 100), mt_rand(0, 100), mt_rand(0, 100));
//�ַ��漴��ɫ
ImageChar($im, $fontsize, $j, 3, $code, $color3);
//���ַ�
$randcode .= $code;
//��λ������֤���ַ���
}
/*
* ��Ӹ���
*/
for ($i = 0; $i < 5; $i++) {
$color1 = ImageColorAllocate($im, mt_rand(0, 255), mt_rand(0, 255), mt_rand(0, 255));
//��������ɫ
ImageArc($im, mt_rand(-5, $w), mt_rand(-5, $h), mt_rand(20, 300), mt_rand(20, 200), 55, 44, $color1);
//������
}
for ($i = 0; $i < $how * 15; $i++) {
$color2 = ImageColorAllocate($im, mt_rand(0, 255), mt_rand(0, 255), mt_rand(0, 255));
//���ŵ���ɫ
ImageSetPixel($im, mt_rand(0, $w), mt_rand(0, $h), $color2);
//���ŵ�
}
//����֤���ַ���д��session
//$this->session->set_userdata(array($this->name=>$randcode));
$_SESSION[$this->name] = $randcode;
/*��ͼ����*/
Imagegif($im);
ImageDestroy($im);
/*��ͼ����*/
}
<?php
header("Content-type: image/png");
$img = ImageCreate(18, 25);
ImageColorAllocate($img, 0, 0, 0);
//��˹�����ٻ���մ�
$orange = ImageColorAllocate($img, 255, 128, 0);
/* ����� $num ��͵����Ẻ�ź�ŷ��١�ŧ�Ҩҡ query string ������
counter.php ������� */
ImageChar($img, 5, 5, 5, $num, $orange);
ImagePNG($img);
ImageDestroy($img);
function create_my_captcha()
{
Header("Content-type: image/gif");
/*
* 初始化
*/
$border = 0;
//是否要边框 1要:0不要
$how = 4;
//验证码位数
$w = $how * 15;
//图片宽度
$h = 20;
//图片高度
$fontsize = 16;
//字体大小
$alpha = "abcdefghijkmnpqrstuvwxyzABCDEFGHIGKLMNPQRSTUVWXYZ";
//验证码内容1:字母
$number = "23456789";
//验证码内容2:数字
$randcode = "";
//验证码字符串初始化
srand((double) microtime() * 1000000);
//初始化随机数种子
$im = ImageCreate($w, $h);
//创建验证图片
/*
* 绘制基本框架
*/
$bgcolor = ImageColorAllocate($im, 255, 255, 255);
//设置背景颜色
ImageFill($im, 0, 0, $bgcolor);
//填充背景色
if ($border) {
$black = ImageColorAllocate($im, 0, 0, 0);
//设置边框颜色
ImageRectangle($im, 0, 0, $w - 1, $h - 1, $black);
//绘制边框
}
/*
* 逐位产生随机字符
*/
for ($i = 0; $i < $how; $i++) {
$alpha_or_number = mt_rand(0, 1);
//字母还是数字
$str = $alpha_or_number ? $alpha : $number;
$which = mt_rand(0, strlen($str) - 1);
//取哪个字符
$code = substr($str, $which, 1);
//取字符
$j = !$i ? 4 : $j + 15;
//绘字符位置
$color3 = ImageColorAllocate($im, mt_rand(0, 100), mt_rand(0, 100), mt_rand(0, 100));
//字符随即颜色
ImageChar($im, $fontsize, $j, 3, $code, $color3);
//绘字符
$randcode .= $code;
//逐位加入验证码字符串
}
/*
* 添加干扰
*/
for ($i = 0; $i < 2; $i++) {
$color1 = ImageColorAllocate($im, mt_rand(0, 255), mt_rand(0, 255), mt_rand(0, 255));
//干扰线颜色
ImageArc($im, mt_rand(-5, $w), mt_rand(-5, $h), mt_rand(20, 300), mt_rand(20, 200), 55, 44, $color1);
//干扰线
}
for ($i = 0; $i < $how * 7; $i++) {
$color2 = ImageColorAllocate($im, mt_rand(0, 255), mt_rand(0, 255), mt_rand(0, 255));
//干扰点颜色
ImageSetPixel($im, mt_rand(0, $w), mt_rand(0, $h), $color2);
//干扰点
}
//把验证码字符串写入session
$_SESSION['login_check_number'] = strtoupper($randcode);
/*绘图结束*/
Imagegif($im);
ImageDestroy($im);
/*绘图结束*/
}
if ($chart_values[$i] == $chart_values[$i + 1]) {
$no_of_users[$chart_values[$i]] = $x++;
} else {
$no_of_users[$chart_values[$i]] = $x;
$x = 1;
}
}
//$no_of_users = array ( "0"=>"2","20"=>"3","66" => "2" ,"70" => "3", "100" => "1") ;
$users_arr_keys = @array_keys($no_of_users);
//PRINTING THE VALUES ON THE CHART
for ($i = 0; $i < count($users_arr_keys); $i++) {
$key = $users_arr_keys[$i];
$val = $no_of_users[$key];
$x1 = $key * 4 + 15;
$y1 = 180 - $distance_inbetween * $val;
$key1 = $users_arr_keys[$i + 1];
$val1 = $no_of_users[$key1];
$x2 = $key1 * 4 + 15;
$y2 = 180 - $distance_inbetween * $val1;
// imagearc ( $image, $x1, $y1, $x2, $y2, $x1, $x2, $border);
//echo "$y1<br>";
if ($key1 != NULL) {
ImageLine($image, $x1, $y1, $x2, $y2, $border);
}
ImageChar($image, $labelfont, $x1, $y1 - 5, ".", $border);
}
header("Content-type: image/png");
// or "Content-type: image/png"
ImageJPEG($image);
// or imagepng($image)
ImageDestroy($image);
public function show($callback = NULL)
{
Header('Content-type: image/gif');
/*
* 初始化
*/
$border = 0;
//是否要边框 1要:0不要
$how = $this->num;
//验证码位数
$w = $this->width;
//图片宽度
$h = $this->height;
//图片高度
$fontsize = 5;
//字体大小
$alpha = 'abcdefghijkmnopqrstuvwxyz';
//验证码内容1:字母
$number = '023456789';
//验证码内容2:数字
$randcode = '';
//验证码字符串初始化
srand((double) microtime() * 1000000);
//初始化随机数种子
$im = ImageCreate($w, $h);
//创建验证图片
/*
* 绘制基本框架
*/
$bgcolor = ImageColorAllocate($im, 255, 255, 255);
//设置背景颜色
ImageFill($im, 0, 0, $bgcolor);
//填充背景色
if ($border) {
$black = ImageColorAllocate($im, 0, 0, 0);
//设置边框颜色
ImageRectangle($im, 0, 0, $w - 1, $h - 1, $black);
//绘制边框
}
/*
* 逐位产生随机字符
*/
for ($i = 0; $i < $how; $i++) {
$alpha_or_number = mt_rand(0, 1);
//字母还是数字
$str = $alpha_or_number ? $alpha : $number;
$which = mt_rand(0, strlen($str) - 1);
//取哪个字符
$code = substr($str, $which, 1);
//取字符
$j = !$i ? 4 : $j + 15;
//绘字符位置
$color3 = ImageColorAllocate($im, mt_rand(0, 100), mt_rand(0, 100), mt_rand(0, 100));
//字符随即颜色
ImageChar($im, $fontsize, $j, 3, $code, $color3);
//绘字符
$randcode .= $code;
//逐位加入验证码字符串
}
/*
* 添加干扰
*/
for ($i = 0; $i < 5; $i++) {
$color1 = ImageColorAllocate($im, mt_rand(0, 255), mt_rand(0, 255), mt_rand(0, 255));
//干扰线颜色
ImageArc($im, mt_rand(-5, $w), mt_rand(-5, $h), mt_rand(20, 300), mt_rand(20, 200), 55, 44, $color1);
//干扰线
}
for ($i = 0; $i < $how * 15; $i++) {
$color2 = ImageColorAllocate($im, mt_rand(0, 255), mt_rand(0, 255), mt_rand(0, 255));
//干扰点颜色
ImageSetPixel($im, mt_rand(0, $w), mt_rand(0, $h), $color2);
//干扰点
}
//把验证码字符串写入session
//$_SESSION[$this->name]=$randcode;
// if (isset($this->output_conf)) {
// if (is_array($this->output_conf)) {
// $this->output_conf['verify_code'] = $randcode;
// } else {
// $this->output_conf->verify_code = $randcode;
// }
// }
// $this->CI->session->set_userdata('verify_code', $randcode);
if (isset($callback)) {
$callback($randcode);
}
/*绘图结束*/
Imagegif($im);
ImageDestroy($im);
/*绘图结束*/
return $randcode;
}
function show()
{
Header("Content-type: image/gif");
/*
* 初始化
*/
$border = 0;
//是否要边框 1要:0不要
$how = $this->num;
//验证码位数
$w = $this->width;
//图片宽度
$h = $this->height;
//图片高度
$fontsize = 5;
//字体大小
$alpha = "abcdefghijkmnpqrstuvwxyz";
//验证码内容1:字母
$number = "23456789";
//验证码内容2:数字
$randcode = "";
//验证码字符串初始化
srand((double) microtime() * 1000000);
//初始化随机数种子
$im = ImageCreate($w, $h);
//创建验证图片
/*
* 绘制基本框架
*/
$bgcolor = ImageColorAllocate($im, 255, 255, 255);
//设置背景颜色
ImageFill($im, 0, 0, $bgcolor);
//填充背景色
if ($border) {
$black = ImageColorAllocate($im, 0, 0, 0);
//设置边框颜色
ImageRectangle($im, 0, 0, $w - 1, $h - 1, $black);
//绘制边框
}
/*
* 逐位产生随机字符
*/
for ($i = 0; $i < $how; $i++) {
$alpha_or_number = mt_rand(0, 1);
//字母还是数字
$str = $alpha_or_number ? $alpha : $number;
$which = mt_rand(0, strlen($str) - 1);
//取哪个字符
$code = substr($str, $which, 1);
//取字符
$j = !$i ? 4 : $j + 15;
//绘字符位置
$color3 = ImageColorAllocate($im, mt_rand(0, 100), mt_rand(0, 100), mt_rand(0, 100));
//字符随即颜色
ImageChar($im, $fontsize, $j, 3, $code, $color3);
//绘字符
$randcode .= $code;
//逐位加入验证码字符串
}
/*
* 添加干扰
* 目的是为了不让机器轻易破解
*/
for ($i = 0; $i < 5; $i++) {
$color1 = ImageColorAllocate($im, mt_rand(0, 255), mt_rand(0, 255), mt_rand(0, 255));
//干扰线颜色
ImageArc($im, mt_rand(-5, $w), mt_rand(-5, $h), mt_rand(20, 300), mt_rand(20, 200), 55, 44, $color1);
//干扰线
}
for ($i = 0; $i < $how * 15; $i++) {
$color2 = ImageColorAllocate($im, mt_rand(0, 255), mt_rand(0, 255), mt_rand(0, 255));
//干扰点颜色
ImageSetPixel($im, mt_rand(0, $w), mt_rand(0, $h), $color2);
//干扰点
}
//把验证码字符串写入session
//$this->session->set_userdata(array($this->name=>$randcode));
//???????????????/
$_SESSION[$this->name] = $randcode;
/*绘图结束*/
Imagegif($im);
ImageDestroy($im);
/*绘图结束*/
}
public function getCode()
{
Header("Content-type: image/png");
/*
* 初始化
*/
$border = 1;
//是否要边框 1要:0不要
$how = 4;
//验证码位数
$w = $how * 15;
//图片宽度
$h = 20;
//图片高度
$fontsize = 6;
//字体大小
$alpha = "abcdefghijkmnopqrstuvwxyz";
//验证码内容1:字母
$number = "023456789";
//验证码内容2:数字
$randcode = "";
//验证码字符串初始化
srand((double) microtime() * 1000000);
//初始化随机数种子
$im = ImageCreate($w, $h);
//创建验证图片
/*
* 绘制基本框架
*/
$bgcolor = ImageColorAllocate($im, 255, 255, 255);
//设置背景颜色
ImageFill($im, 0, 0, $bgcolor);
//填充背景色
if ($border) {
$black = ImageColorAllocate($im, 0, 0, 0);
//设置边框颜色
ImageRectangle($im, 0, 0, $w - 1, $h - 1, $black);
//绘制边框
}
/*
* 逐位产生随机字符
*/
for ($i = 0; $i < $how; $i++) {
$alpha_or_number = mt_rand(0, 1);
//字母还是数字
$str = $alpha_or_number ? $alpha : $number;
$which = mt_rand(0, strlen($str) - 1);
//取哪个字符
$code = substr($str, $which, 1);
//取字符
$j = !$i ? 4 : $j + 15;
//绘字符位置
$color3 = ImageColorAllocate($im, mt_rand(0, 100), mt_rand(0, 100), mt_rand(0, 100));
//字符随即颜色
ImageChar($im, $fontsize, $j, 3, $code, $color3);
//绘字符
$randcode .= $code;
//逐位加入验证码字符串
}
//把验证码字符串写入session
session_start();
$_SESSION['authnum_session'] = $randcode;
/*
* 添加干扰
*/
for ($i = 0; $i < 1; $i++) {
$color1 = ImageColorAllocate($im, mt_rand(0, 255), mt_rand(0, 255), mt_rand(0, 255));
//干扰线颜色
ImageArc($im, mt_rand(-5, $w), mt_rand(-5, $h), mt_rand(20, 300), mt_rand(20, 200), 55, 44, $color1);
//干扰线
}
for ($i = 0; $i < $how * 40; $i++) {
$color2 = ImageColorAllocate($im, mt_rand(0, 255), mt_rand(0, 255), mt_rand(0, 255));
//干扰点颜色
ImageSetPixel($im, mt_rand(0, $w), mt_rand(0, $h), $color2);
//干扰点
}
//关键代码，防止出现'图像因其本身有错无法显示'的问题
ob_clean();
/*绘图结束*/
Imagegif($im);
ImageDestroy($im);
/*绘图结束*/
}
