addValidator example

                            if (is_array($value)) {
                                $temp = $value; // keep the original value                                 $this->_defaults[self::NOT_EMPTY_MESSAGE] = array_pop($temp);
                                unset($temp);
                            } else {
                                $this->_defaults[self::NOT_EMPTY_MESSAGE] = $value;
                            }
                        }
                    }

                    $validatorRule[self::VALIDATOR_CHAIN]->addValidator($validator, $validatorRule[self::BREAK_CHAIN]);
                }
                $validatorRule[self::VALIDATOR_CHAIN_COUNT] = count($validatorList);
            }

            /** * If the ruleName is the special wildcard rule, * then apply the validator chain to all input data. * Else just process the field named by the rule. */
            if ($ruleName == self::RULE_WILDCARD) {
                foreach (array_keys($this->_data) as $field)  {
                    

/** * Constructor. * * @param string $host OPTIONAL Hostname of remote connection (default: 127.0.0.1) * @param integer $port OPTIONAL Port number (default: null) * @throws Zend_Mail_Protocol_Exception * @return void */
    public function __construct($host = '127.0.0.1', $port = null)
    {
        $this->_validHost = new Zend_Validate();
        $this->_validHost->addValidator(new Zend_Validate_Hostname(Zend_Validate_Hostname::ALLOW_ALL));

        if (!$this->_validHost->isValid($host)) {
            /** * @see Zend_Mail_Protocol_Exception */
            throw new Zend_Mail_Protocol_Exception(join(', ', $this->_validHost->getMessages()));
        }

        $this->_host = $host;
        $this->_port = $port;
    }