Question

我在蛋糕php遇到验证码问题。当尝试调用captcha时，会话值显示前一个。所以永远得不到正确的答案。

这是我的代码。

对于组件部分，我把这段代码

class CaptchaComponent extends Object
{
    var $controller; 

 var $font = 'monofont.ttf';

 function CaptchaComponent( $controller ) {
  $this->controller = $controller;
 }

 function generateCode($characters) {
  /* list all possible characters, similar looking characters and vowels have been removed */
  $possible = '23456789bcdfghjkmnpqrstvwxyz';
  $code = '';
  $i = 0;
  while ($i < $characters) { 
   $code .= substr($possible, mt_rand(0, strlen($possible)-1), 1);
   $i++;
  }
  return $code;
 }

 function create($width='120',$height='40',$characters='6') {
  $code = $this->generateCode($characters);
  /* font size will be 75% of the image height */
  $font_size = $height * 0.80;
  $image = @imagecreate($width, $height) or die('Cannot initialize new GD image stream');
  /* set the colours */
  $background_color = imagecolorallocate($image, 220, 220, 220);
  $text_color = imagecolorallocate($image, 10, 30, 80);
  $noise_color = imagecolorallocate($image, 150, 180, 220);
  /* generate random dots in background */
  for( $i=0; $i<($width*$height)/3; $i++ ) {
   imagefilledellipse($image, mt_rand(0,$width), mt_rand(0,$height), 1, 1, $noise_color);
  }
  /* generate random lines in background */
  for( $i=0; $i<($width*$height)/150; $i++ ) {
   imageline($image, mt_rand(0,$width), mt_rand(0,$height), mt_rand(0,$width), mt_rand(0,$height), $noise_color);
  }
  /* create textbox and add text */
  $textbox = imagettfbbox($font_size, 0, $this->font, $code) or die('Error in imagettfbbox function');
  $x = ($width - $textbox[4])/2;
  $y = ($height - $textbox[5])/2;
  imagettftext($image, $font_size, 0, $x, $y, $text_color, $this->font , $code) or die('Error in imagettftext function');
  /* output captcha image to browser */
  header('Content-Type: image/jpeg');
  imagejpeg($image);
  imagedestroy($image);
  $this->controller->Session->write('security_code',$code);
 }
}

对于用户控制器部分，我的代码是

function captcha() {

   App::import('Component','Captcha');
  $this->Captcha = new CaptchaComponent($this);
   $this->Captcha->create();

 }

并且对于查看选项，我的代码是

echo $html->image('../users/captcha',  
 array('style'=>'border:1px #ccc solid','vspace'=>2)  
 );

Answer 1

CakePHP 2.x的此验证码组件的最新工作版本可在作者网站http://www.devarticles.in/cakephp/simple-captcha-component-for-cakephp/

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蛋糕php验证码问题

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