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/**
***********************************************************************************************
* @copyright 2004-2016 The Admidio Team
* @see http://www.admidio.org/
* @license https://www.gnu.org/licenses/gpl-2.0.html GNU General Public License v2.0 only
***********************************************************************************************
*/
require_once(SERVER_PATH.'/adm_program/libs/securimage/securimage.php');
/**
* @class FormValidation
* @brief Validate various content of form elements
*
* This class can be used to validate form input. Therefore the methods can be called and get the
* form input as parameter. The method will return @b true if validation was succesfull. Otherwise
* an AdmException will be thrown. To catch this exception all method calls of this class should
* be within a try and catch structure. Also all method are declared static.
*
* @par Examples
* @code // validate the captcha code
* try
* {
* FormValidation::checkCaptcha($_POST['captcha_code']);
* }
* catch(AdmException $e)
* {
* $e->showHtml();
* } @endcode
*/
class FormValidation
{
/**
* Checks if the value of the captcha input matches with the captcha image.
* @param string $value Value of the captcha input field.
* @throws AdmException SYS_CAPTCHA_CALC_CODE_INVALID, SYS_CAPTCHA_CODE_INVALID
* @return true Returns @b true if the value matches the captcha image.
* Otherwise throw an exception SYS_CAPTCHA_CODE_INVALID.
*/
public static function checkCaptcha($value)
{
global $gPreferences;
$securimage = new Securimage();
if ($securimage->check($value) === false)
{
if($gPreferences['captcha_type'] === 'calc')
{
throw new AdmException('SYS_CAPTCHA_CALC_CODE_INVALID');
}
throw new AdmException('SYS_CAPTCHA_CODE_INVALID');
}
return true;
}
}