/usr/share/php/Text/CAPTCHA.php is in php-text-captcha 1.0.2-2ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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/**
* Text_CAPTCHA - creates a CAPTCHA for Turing tests.
* Base class file for using Text_CAPTCHA.
*
* PHP version 5
*
* @category Text
* @package Text_CAPTCHA
* @author Christian Wenz <wenz@php.net>
* @license http://www.opensource.org/licenses/bsd-license.php BSD License
* @link http://pear.php.net/package/Text_CAPTCHA
*/
/**
* Require Exception class for error handling.
*/
require_once 'Text/CAPTCHA/Exception.php';
/**
* Require Text_Password class for generating the phrase.
*/
require_once 'Text/Password.php';
/**
* Text_CAPTCHA - creates a CAPTCHA for Turing tests.
* Class to create a Turing test for websites by creating an image, ASCII art or
* something else with some (obfuscated) characters.
*
* @category Text
* @package Text_CAPTCHA
* @author Christian Wenz <wenz@php.net>
* @author Michael Cramer <michael@bigmichi1.de>
* @license http://www.opensource.org/licenses/bsd-license.php BSD License
* @link http://pear.php.net/package/Text_CAPTCHA
*/
class Text_CAPTCHA
{
/**
* driver for Text_CAPTCHA
*
* @var Text_CAPTCHA_Driver_Base
*/
private $_driver;
/**
* check if an initial driver init was done.
*
* @var bool
*/
private $_driverInitDone = false;
/**
* Constructor for the TEXT_CAPTCHA object with the given driver.
*
* @param Text_CAPTCHA_Driver $driver driver
*
* @throws Text_CAPTCHA_Exception no driver given
*/
function __construct($driver)
{
if (is_null($driver)) {
throw new Text_CAPTCHA_Exception("No driver given");
}
$this->_driver = $driver;
$this->_driverInitDone = false;
}
/**
* Create a new Text_CAPTCHA object.
*
* @param string $driver name of driver class to initialize
*
* @return Text_CAPTCHA a newly created Text_CAPTCHA object
* @throws Text_CAPTCHA_Exception when driver could not be loaded
*
*/
public static function factory($driver)
{
$driver = basename($driver);
$class = 'Text_CAPTCHA_Driver_' . $driver;
$file = str_replace('_', '/', $class) . '.php';
//check if it exists and can be loaded
if (!@fclose(@fopen($file, 'r', true))) {
throw new Text_CAPTCHA_Exception(
'Driver ' . $driver . ' cannot be loaded.'
);
}
//continue with including the driver
include_once $file;
$driver = new $class;
return new Text_CAPTCHA($driver);
}
/**
* Create random CAPTCHA phrase
*
* @param boolean|string $newPhrase new Phrase to use or true to generate a new
* one
*
* @return void
* @throws Text_CAPTCHA_Exception when driver is not initialized
*/
public final function generate($newPhrase = false)
{
if (!$this->_driverInitDone) {
throw new Text_CAPTCHA_Exception("Driver not initialized");
}
if ($newPhrase === true || is_null($this->_driver->getPhrase())) {
$this->_driver->createPhrase();
} else if (strlen($newPhrase) > 0) {
$this->_driver->setPhrase($newPhrase);
}
$this->_driver->createCAPTCHA();
}
/**
* Reinitialize the entire Text_CAPTCHA object.
*
* @param array $options Options to pass in.
*
* @return void
*/
public final function init($options = array())
{
$this->_driver->resetDriver();
$this->_driver->initDriver($options);
$this->_driverInitDone = true;
$this->generate();
}
/**
* Place holder for the real getCAPTCHA() method used by extended classes to
* return the generated CAPTCHA (as an image resource, as an ASCII text, ...).
*
* @return string|object
*/
public final function getCAPTCHA()
{
return $this->_driver->getCAPTCHA();
}
/**
* Return secret CAPTCHA phrase.
*
* @return string secret phrase
*/
public final function getPhrase()
{
return $this->_driver->getPhrase();
}
}
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