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<?php
namespace kalanis\kw_forms\Controls\Security\Captcha;
use ArrayAccess;
use kalanis\kw_rules\Interfaces\IRules;
/**
* Class Numerical
* @package kalanis\kw_forms\Controls\Security\Captcha
* Numerical operation solving captcha
*/
class Numerical extends AGraphical
{
public function set(string $alias, ArrayAccess &$session, string $errorMessage, string $font = '/usr/share/fonts/truetype/freefont/FreeMono.ttf'): AGraphical
$this->font = $font;
$num1 = mt_rand(0, 9);
$num2 = mt_rand(0, 9);
$text = ' ' . $num1 . ' + ' . $num2 . ' =';
$this->setEntry($alias, null, $text);
$this->fillSession($alias, $session, strval($num1 + $num2));
$this->setAttribute('id', $this->getKey());
parent::addRule(IRules::SATISFIES_CALLBACK, $errorMessage, [$this, 'checkFillCaptcha']);
return $this;
}
public function addRule(/** @scrutinizer ignore-unused */ string $ruleName, /** @scrutinizer ignore-unused */ string $errorText, /** @scrutinizer ignore-unused */ ...$args): void
// no additional rules applicable
* @param mixed $value
* @return bool
public function checkFillCaptcha($value): bool
$formName = $this->getKey() . '_last';
return $this->session->offsetExists($formName) && (intval($this->session->offsetGet($formName)) == intval($value));
public function renderLabel($attributes = null): string
return '';
public function renderInput($attributes = null): string
return parent::renderLabel() . ' '. parent::renderInput($attributes);
alex-kalanis /
kw_forms
