I create a plugin and into this plugin I want to use captcha component
when I used it I can't read the security code of the captcha because
its can't write the session
this component code
class CaptchaComponent extends Object
{
var $controller;
var $font = 'plugins/[pluginName]/webroot/monofont.ttf';
var $components = array('Session');
function startup($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='190',$height='58',$characters='5') {
$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, 238, 238, 238);
$text_color = imagecolorallocate($image, 0, 79, 135);
$noise_color = imagecolorallocate($image, 38, 139, 207);
/* 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, APP.$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, $text_color,
APP.$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);
}
}
?>
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