_error example

/** * Defined by Zend_Validate_Interface. * * Returns true if and only if $value is a valid ISBN. * * @param string $value * @return boolean */
    public function isValid($value)
    {
        if (!is_string($value) && !is_int($value)) {
            $this->_error(self::INVALID);
            return false;
        }

        $value = (string) $value;
        $this->_setValue($value);

        switch ($this->_detectFormat()) {
            case self::ISBN10:
                // sum                 $isbn10 = str_replace($this->_separator, '', $value);
                $sum    = 0;
                

    public function isValid($value)
    {
        $this->_setValue($value);

        if ($this->_min >= $value) {
            $this->_error(self::NOT_GREATER);
            return false;
        }
        return true;
    }

}

    public function isValid($value)
    {
        $this->_setValue($value);

        if (!is_string($value)) {
            $this->_error(self::INVALID, $value);
            return false;
        }

        if (!ctype_digit($value)) {
            $this->_error(self::CONTENT, $value);
            return false;
        }

        $length = strlen($value);
        $types  = $this->getType();
        $foundp = false;
        

/** * Defined by Zend_Validate_Interface * * Returns true if and only if $value is a valid IP address * * @param mixed $value * @return boolean */
    public function isValid($value)
    {
        if (!is_string($value)) {
            $this->_error(self::INVALID);
            return false;
        }

        $this->_setValue($value);
        if (($this->_options['allowipv4'] && !$this->_options['allowipv6'] && !$this->_validateIPv4($value)) ||
            (!$this->_options['allowipv4'] && $this->_options['allowipv6'] && !$this->_validateIPv6($value)) ||
            ($this->_options['allowipv4'] && $this->_options['allowipv6'] && !$this->_validateIPv4($value) && !$this->_validateIPv6($value))) {
            $this->_error(self::NOT_IP_ADDRESS);
            return false;
        }

        

    public function isValid($value)
    {
        if (!is_string($value)) {
            $this->_error(self::INVALID);
            return false;
        }

        $this->_setValue($value);
        // Check input against IP address schema         if (preg_match('/^[0-9a-f:.]*$/i', $value) &&
            $this->_options['ip']->setTranslator($this->getTranslator())->isValid($value)) {
            if (!($this->_options['allow'] & self::ALLOW_IP)) {
                $this->_error(self::IP_ADDRESS_NOT_ALLOWED);
                return false;
            } else {
                

/** * Defined by Zend_Validate_Interface * * Returns true if and only if $value contains only alphabetic and digit characters * * @param string $value * @return boolean */
    public function isValid($value)
    {
        if (!is_string($value) && !is_int($value) && !is_float($value)) {
            $this->_error(self::INVALID);
            return false;
        }

        $this->_setValue($value);

        if ('' === $value) {
            $this->_error(self::STRING_EMPTY);
            return false;
        }

        if (null === self::$_filter) {
            

$this->_setValue($value);

        if (empty($this->_locale)) {
            $region = substr($value, 0, 2);
        } else {
            $region = new Zend_Locale($this->_locale);
            $region = $region->getRegion();
        }

        if (!array_key_exists($region, $this->_ibanregex)) {
            $this->_setValue($region);
            $this->_error(self::NOTSUPPORTED);
            return false;
        }

        if (!preg_match($this->_ibanregex[$region], $value)) {
            $this->_error(self::FALSEFORMAT);
            return false;
        }

        $format = substr($value, 4) . substr($value, 0, 4);
        $format = str_replace(
            array('A',  'B',  'C',  'D',  'E',  'F',  'G',  'H',  'I',  'J',  'K',  'L',  'M',
                  

/** * Defined by Zend_Validate_Interface * * Returns true if and only if $value is a valid integer * * @param string|integer $value * @return boolean */
    public function isValid($value)
    {
        if (!is_string($value) && !is_int($value) && !is_float($value)) {
            $this->_error(self::INVALID);
            return false;
        }

        if (is_int($value)) {
            return true;
        }

        $this->_setValue($value);
        if ($this->_locale === null) {
            $locale        = localeconv();
            $valueFiltered = str_replace($locale['decimal_point'], '.', $value);
            

/** * Validates if a string is valid as a sitemap priority * * @link http://www.sitemaps.org/protocol.php#prioritydef <priority> * * @param string $value value to validate * @return boolean */
    public function isValid($value)
    {
        if (!is_numeric($value)) {
            $this->_error(self::INVALID);
            return false;
        }

        $this->_setValue($value);
        $value = (float) $value;
        if ($value < 0 || $value > 1) {
            $this->_error(self::NOT_VALID);
            return false;
        }

        return true;
    }

/** * Defined by Zend_Validate_Interface * * Returns true if and only if $value contains only hexadecimal digit characters * * @param string $value * @return boolean */
    public function isValid($value)
    {
        if (!is_string($value) && !is_int($value)) {
            $this->_error(self::INVALID);
            return false;
        }

        $this->_setValue($value);
        if (!ctype_xdigit((string) $value)) {
            $this->_error(self::NOT_HEX);
            return false;
        }

        return true;
    }

}

class Zend_Validate_Db_NoRecordExists extends Zend_Validate_Db_Abstract
{
    public function isValid($value)
    {
        $valid = true;
        $this->_setValue($value);

        $result = $this->_query($value);
        if ($result) {
            $valid = false;
            $this->_error(self::ERROR_RECORD_FOUND);
        }

        return $valid;
    }
}

/** * Defined by Zend_Validate_Interface * * Returns true if and only if $value only contains digit characters * * @param string $value * @return boolean */
    public function isValid($value)
    {
        if (!is_string($value) && !is_int($value) && !is_float($value)) {
            $this->_error(self::INVALID);
            return false;
        }

        $this->_setValue((string) $value);

        if ('' === $this->_value) {
            $this->_error(self::STRING_EMPTY);
            return false;
        }

        if (null === self::$_filter) {
            

/** * Defined by Zend_Validate_Interface * * Returns true if and only if $value contains a valid barcode * * @param string $value * @return boolean */
    public function isValid($value)
    {
        if (!is_string($value)) {
            $this->_error(self::INVALID);
            return false;
        }

        $this->_setValue($value);
        $adapter       = $this->getAdapter();
        $this->_length = $adapter->getLength();
        $result        = $adapter->checkLength($value);
        if (!$result) {
            if (is_array($this->_length)) {
                $temp = $this->_length;
                $this->_length = "";
                

// Try quoted string format
            // Quoted-string characters are: DQUOTE *([FWS] qtext/quoted-pair) [FWS] DQUOTE             // qtext: Non white space controls, and the rest of the US-ASCII characters not             // including "\" or the quote character             $noWsCtl = '\x01-\x08\x0b\x0c\x0e-\x1f\x7f';
            $qtext   = $noWsCtl . '\x21\x23-\x5b\x5d-\x7e';
            $ws      = '\x20\x09';
            if (preg_match('/^\x22([' . $ws . $qtext . '])*[$ws]?\x22$/', $this->_localPart)) {
                $result = true;
            } else {
                $this->_error(self::DOT_ATOM);
                $this->_error(self::QUOTED_STRING);
                $this->_error(self::INVALID_LOCAL_PART);
            }
        }

        return $result;
    }

    /** * Internal method to validate the servers MX records * * @return boolean */

$this->_compress = true;
                $this->_compress_type = 'gz';
            } else {
                if ($p_compress == 'bz2') {
                    $this->_compress = true;
                    $this->_compress_type = 'bz2';
                } else {
                    if ($p_compress == 'lzma2') {
                        $this->_compress = true;
                        $this->_compress_type = 'lzma2';
                    } else {
                        $this->_error(
                            "Unsupported compression type '$p_compress'\n" .
                            "Supported types are 'gz', 'bz2' and 'lzma2'.\n"
                        );
                        return false;
                    }
                }
            }
        }
        $this->_tarname = $p_tarname;
        if ($this->_compress) { // assert zlib or bz2 or xz extension support             if ($this->_compress_type == 'gz') {