Question

Does exist Zend Filter similar to Zend Validator Identical?

The case I should filter input==’test’

$el->addFilter('Identical','test');

The problem that such filter not exist.

Thanks,
Yosef

Answer 1

I’m not sure how this filter should work, since it is not clear from your question. Anyway, I made some custom filter that will check if a value of input filed is equal to some $token. If they are equal than the input value will be empty string.

The filter looks as follows:

// file: APPLICATION_PATH/filters/Identical.php 

class My_Filter_Identical implements Zend_Filter_Interface {

    /**
     * Token with witch input is compared
     *
     * @var string
     */
    protected $_token;

    /**
     * Set token
     *
     * @param  string
     * @return void
     */
    public function __construct($token = '') {
        $this->_token = $token;
    }

    /**
     * Filtering method 
     *
     * @param string $value value of input filed
     * @return string
     */
    public function filter($value) {

        if ($value !== $this->_token) {
            return $value;
        }

        return '';
    }

}

To apply it to a given form element:

require_once (APPLICATION_PATH . '/filters/Identical.php');
$el1->addFilter(new My_Filter_Identical('test'));

Off course instead of require_once it could be added to your resource autoloader, but as an example I think it is not needed right now.

Edit:

Forgot to mention pregReplace filter.
The same what the custom filter above does could be done using pregReplace filter:

$el1->addFilter('pregReplace',array('/test/',''));

But, as I said, I’m not sure how you want your filter to work. If you provide more info maybe I could help more.