蛋糕php驗證碼問題

Question

我面臨着驗證碼在蛋糕php的問題。當嘗試調用驗證碼時，會話值顯示前一個。所以永遠不要得到正確的答案。

這是我的代碼。

對於組件部分，我把這個代碼

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); 
} 
} 

對於用戶控制器部分我的代碼是

function captcha() { 

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

} 

和視圖選項我的代碼是

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

Answer 1

最新工作版本CakePHP 2.x的這個驗證碼組件可在此處的作者網站上獲得http://www.devarticles.in/cakephp/simple-captcha-component-for-cakephp/