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<?phpsession_start(); // captcha class uses session to hold captcha security code
 include "class.captcha.php";
 
 $cap = new Captcha(); // instantiate Captcha class
 
 /* then, customize captcha image if required */
 $cap->setBGColor(255,0,0);  // sets background color of image
 $cap->setTextColor(0,255,0); // sets the text color
 $cap->setSize(100,40); // sets the image size.
 /* all the above methods are optional */
 
 $cap->showImage(); // outputs captcha image.
 
 
 ?>
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