Zend_Validate example

/** * 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;
    }

foreach ($validatorList as $key => $validator) {
                    if (array_key_exists($key, $unifiedMessages)) {
                        $validatorRule[self::MESSAGES][$key] = $unifiedMessages[$key];
                    }
                }
            }

            /** * Load all the validator classes and add them to the chain. */
            if (!isset($validatorRule[self::VALIDATOR_CHAIN])) {
                $validatorRule[self::VALIDATOR_CHAIN] = new Zend_Validate();

                foreach ($validatorList as $key => $validator) {
                    if (is_string($validator) || is_array($validator)) {
                        $validator = $this->_getValidator($validator);
                    }

                    if (isset($validatorRule[self::MESSAGES][$key])) {
                        $value = $validatorRule[self::MESSAGES][$key];
                        if (is_array($value)) {
                            $validator->setMessages($value);
                        } else {