Hi all,
I try to implement a custom captcha element: the user sees a number spelled
out (ie 'twenty' and is supposed to give the numerical equivalent: 20). If
he passes that test, he is supposed to be human.
This is the code for my custom element:
<?php
class Elements_Randcap extends Zend_Form_Element_Text
{
private $numbers = array();
private $numberToCheck;
public function init ()
{
$this->numbers =
array("nul","een","twee","drie","vier","vijf","zes");
//much longer array needed
$this->numberToCheck = floor(rand(0,count($this->numbers)-1));
$captcha = $this->numbers[$this->numberToCheck];
$this->setLabel('Typ dit getal in cijfers:<strong>' . $captcha .
'</strong>');
$this->addValidator('Randcap',false,array($this->numberToCheck));
}
}
?>
This is my custom validator
<?php
class Validators_Randcap extends Zend_Validate_Abstract {
const IS_BOT = 'NoBlog';
protected $_messageTemplates = array(self::IS_BOT => 'Het antispam getal
was niet juist ingevuld');
/**
* The integer that is passed by the form
*
* @var int
*/
protected $_captcha;
/**
*
* @param int numberToCheck
*/
public function __construct($numberToCheck) {
$this->_captcha = $numberToCheck;
}
/**
* Check if the element using this validator is valid
*
*
* @param $value string
* @return boolean Returns true if the element is valid
*/
public function isValid($value) {
$value = (int) $value;
$this->_setValue($value);
$error = false;
if ($this->_captcha != $value) {
$error = true;
$this->_error(self::IS_BOT);
$errorMessage = 'Het antispam getal was niet juist ingevuld';
$this->setMessage($errorMessage, self::IS_BOT);
}
return !$error;
}
}
?>
However, this doesn't work. It seems as if the validator is called twice:
once upon instantiating the form, the element generates a captcha number.
And when I check the post in my controller (with $form->isValid), it seems
as if another captcha number is evaluated.
What should I do to solve this problem?
Thanks for any help!
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