ManaPHP\Http\Filter::sanitize PHP Метод

    public function sanitize($attribute, $rule, $value)
    {
        if ($rule === null && isset($this->_rules[$attribute])) {
            $rule = $this->_rules[$attribute];
        }
        if ($rule === null && $value === null) {
            return null;
        }
        $filters = $this->_parseRule($rule);
        if ($value === null && !isset($filters['default'])) {
            $this->_sanitize($attribute, 'required', [], null);
        }
        if (is_int($value)) {
            $value = (string) $value;
        } elseif (is_bool($value)) {
            $value = $value ? '1' : '0';
        } elseif ($value === null) {
            $value = '';
        }
        foreach ($filters as $filter => $parameters) {
            $value = $this->_sanitize($attribute, $filter, $parameters, $value);
        }
        if (is_string($value) && !isset($filters['ignore']) && !isset($filters['xss'])) {
            $parameters = [];
            $value = $this->_sanitize($attribute, 'xss', $parameters, $value);
        }
        return $value;
    }