captcha.class.php

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<?php
class form_captcha extends form_text {

        protected function afterInit() {
                if (!$this->label && !is_bool($this->label))
                        $this->label = ucfirst($this->name);
                if (!is_object($this->cfg->value))
                        $this->cfg->value = utils::htmlOut($this->cfg->value);
                $this->id = str_replace(
                        array('[]', '[', ']'),
                        array('_', '_', ''),
                        $this->name);
        }

        public function getValid() {
                return null;
        }

        public function isValid() {
                $ret = empty($this->cfg->value);
                if (!$ret && $this->cfg->errorFct && is_callable($this->cfg->errorFct))
                        call_user_func($this->cfg->errorFct);
                return $ret;
        }

        public function getErrors() {
                return $this->isValid()? array() : array($this->cfg->error);
        }

        public function addRule($type, $prm=null) {}

}