Subversion Repositories SmartDukaan

<?php

/**

 * CakePHP(tm) : Rapid Development Framework (http://cakephp.org)

 * Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)

 *

 * Licensed under The MIT License

 * For full copyright and license information, please see the LICENSE.txt

 * Redistributions of files must retain the above copyright notice.

 *

 * @copyright     Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)

 * @link          http://cakephp.org CakePHP(tm) Project

 * @since         CakePHP(tm) v 1.2.0.3830

 * @license       http://www.opensource.org/licenses/mit-license.php MIT License

 */

App::uses('Multibyte', 'I18n');

App::uses('File', 'Utility');

App::uses('CakeNumber', 'Utility');

// Load multibyte if the extension is missing.

if (!function_exists('mb_strlen')) {

	class_exists('Multibyte');

}

/**

 * Validation Class. Used for validation of model data

 *

 * Offers different validation methods.

 *

 * @package       Cake.Utility

 */

class Validation {

/**

 * Some complex patterns needed in multiple places

 *

 * @var array

 */

	protected static $_pattern = array(

		'hostname' => '(?:[_\p{L}0-9][-_\p{L}0-9]*\.)*(?:[\p{L}0-9][-\p{L}0-9]{0,62})\.(?:(?:[a-z]{2}\.)?[a-z]{2,})'

	);

/**

 * Holds an array of errors messages set in this class.

 * These are used for debugging purposes

 *

 * @var array

 */

	public static $errors = array();

/**

 * Checks that a string contains something other than whitespace

 *

 * Returns true if string contains something other than whitespace

 *

 * $check can be passed as an array:

 * array('check' => 'valueToCheck');

 *

 * @param string|array $check Value to check

 * @return bool Success

 */

	public static function notEmpty($check) {

		if (is_array($check)) {

			extract(self::_defaults($check));

		}

		if (empty($check) && $check != '0') {

			return false;

		}

		return self::_check($check, '/[^\s]+/m');

	}

/**

 * Checks that a string contains only integer or letters

 *

 * Returns true if string contains only integer or letters

 *

 * $check can be passed as an array:

 * array('check' => 'valueToCheck');

 *

 * @param string|array $check Value to check

 * @return bool Success

 */

	public static function alphaNumeric($check) {

		if (is_array($check)) {

			extract(self::_defaults($check));

		}

		if (empty($check) && $check != '0') {

			return false;

		}

		return self::_check($check, '/^[\p{Ll}\p{Lm}\p{Lo}\p{Lt}\p{Lu}\p{Nd}]+$/Du');

	}

/**

 * Checks that a string length is within s specified range.

 * Spaces are included in the character count.

 * Returns true is string matches value min, max, or between min and max,

 *

 * @param string $check Value to check for length

 * @param int $min Minimum value in range (inclusive)

 * @param int $max Maximum value in range (inclusive)

 * @return bool Success

 */

	public static function lengthBetween($check, $min, $max) {

		$length = mb_strlen($check);

		return ($length >= $min && $length <= $max);

	}

/**

 * Alias of Validator::lengthBetween() for backwards compatibility.

 *

 * @param string $check Value to check for length

 * @param int $min Minimum value in range (inclusive)

 * @param int $max Maximum value in range (inclusive)

 * @return bool Success

 * @see Validator::lengthBetween()

 * @deprecated Deprecated 2.6. Use Validator::lengthBetween() instead.

 */

	public static function between($check, $min, $max) {

		return self::lengthBetween($check, $min, $max);

	}

/**

 * Returns true if field is left blank -OR- only whitespace characters are present in its value

 * Whitespace characters include Space, Tab, Carriage Return, Newline

 *

 * $check can be passed as an array:

 * array('check' => 'valueToCheck');

 *

 * @param string|array $check Value to check

 * @return bool Success

 */

	public static function blank($check) {

		if (is_array($check)) {

			extract(self::_defaults($check));

		}

		return !self::_check($check, '/[^\\s]/');

	}

/**

 * Validation of credit card numbers.

 * Returns true if $check is in the proper credit card format.

 *

 * @param string|array $check credit card number to validate

 * @param string|array $type 'all' may be passed as a sting, defaults to fast which checks format of most major credit 

 * cards

 *    if an array is used only the values of the array are checked.

 *    Example: array('amex', 'bankcard', 'maestro')

 * @param bool $deep set to true this will check the Luhn algorithm of the credit card.

 * @param string $regex A custom regex can also be passed, this will be used instead of the defined regex values

 * @return bool Success

 * @see Validation::luhn()

 */

	public static function cc($check, $type = 'fast', $deep = false, $regex = null) {

		if (is_array($check)) {

			extract(self::_defaults($check));

		}

		$check = str_replace(array('-', ' '), '', $check);

		if (mb_strlen($check) < 13) {

			return false;

		}

		if ($regex !== null) {

			if (self::_check($check, $regex)) {

				return self::luhn($check, $deep);

			}

		}

		$cards = array(

			'all' => array(

				'amex'		=> '/^3[4|7]\\d{13}$/',

				'bankcard'	=> '/^56(10\\d\\d|022[1-5])\\d{10}$/',

				'diners'	=> '/^(?:3(0[0-5]|[68]\\d)\\d{11})|(?:5[1-5]\\d{14})$/',

				'disc'		=> '/^(?:6011|650\\d)\\d{12}$/',

				'electron'	=> '/^(?:417500|4917\\d{2}|4913\\d{2})\\d{10}$/',

				'enroute'	=> '/^2(?:014|149)\\d{11}$/',

				'jcb'		=> '/^(3\\d{4}|2100|1800)\\d{11}$/',

				'maestro'	=> '/^(?:5020|6\\d{3})\\d{12}$/',

				'mc'		=> '/^5[1-5]\\d{14}$/',

				'solo'		=> '/^(6334[5-9][0-9]|6767[0-9]{2})\\d{10}(\\d{2,3})?$/',

				'switch'	=>

				'/^(?:49(03(0[2-9]|3[5-9])|11(0[1-2]|7[4-9]|8[1-2])|36[0-9]{2})\\d{10}(\\d{2,3})?)|(?:564182\\d{10}(\\d{2,3})?)|(6(3(33[0-4][0-9])|759[0-9]{2})\\d{10}(\\d{2,3})?)$/',

				'visa'		=> '/^4\\d{12}(\\d{3})?$/',

				'voyager'	=> '/^8699[0-9]{11}$/'

			),

			'fast' =>

			'/^(?:4[0-9]{12}(?:[0-9]{3})?|5[1-5][0-9]{14}|6011[0-9]{12}|3(?:0[0-5]|[68][0-9])[0-9]{11}|3[47][0-9]{13})$/'

		);

		if (is_array($type)) {

			foreach ($type as $value) {

				$regex = $cards['all'][strtolower($value)];

				if (self::_check($check, $regex)) {

					return self::luhn($check, $deep);

				}

			}

		} elseif ($type === 'all') {

			foreach ($cards['all'] as $value) {

				$regex = $value;

				if (self::_check($check, $regex)) {

					return self::luhn($check, $deep);

				}

			}

		} else {

			$regex = $cards['fast'];

			if (self::_check($check, $regex)) {

				return self::luhn($check, $deep);

			}

		}

		return false;

	}

/**

 * Used to compare 2 numeric values.

 *

 * @param string|array $check1 if string is passed for a string must also be passed for $check2

 *    used as an array it must be passed as array('check1' => value, 'operator' => 'value', 'check2' -> value)

 * @param string $operator Can be either a word or operand

 *    is greater >, is less <, greater or equal >=

 *    less or equal <=, is less <, equal to ==, not equal !=

 * @param int $check2 only needed if $check1 is a string

 * @return bool Success

 */

	public static function comparison($check1, $operator = null, $check2 = null) {

		if (is_array($check1)) {

			extract($check1, EXTR_OVERWRITE);

		}

		$operator = str_replace(array(' ', "\t", "\n", "\r", "\0", "\x0B"), '', strtolower($operator));

		switch ($operator) {

			case 'isgreater':

			case '>':

				if ($check1 > $check2) {

					return true;

				}

				break;

			case 'isless':

			case '<':

				if ($check1 < $check2) {

					return true;

				}

				break;

			case 'greaterorequal':

			case '>=':

				if ($check1 >= $check2) {

					return true;

				}

				break;

			case 'lessorequal':

			case '<=':

				if ($check1 <= $check2) {

					return true;

				}

				break;

			case 'equalto':

			case '==':

				if ($check1 == $check2) {

					return true;

				}

				break;

			case 'notequal':

			case '!=':

				if ($check1 != $check2) {

					return true;

				}

				break;

			default:

				self::$errors[] = __d('cake_dev', 'You must define the $operator parameter for %s', 'Validation::comparison()');

		}

		return false;

	}

/**

 * Used when a custom regular expression is needed.

 *

 * @param string|array $check When used as a string, $regex must also be a valid regular expression.

 *    As and array: array('check' => value, 'regex' => 'valid regular expression')

 * @param string $regex If $check is passed as a string, $regex must also be set to valid regular expression

 * @return bool Success

 */

	public static function custom($check, $regex = null) {

		if (is_array($check)) {

			extract(self::_defaults($check));

		}

		if ($regex === null) {

			self::$errors[] = __d('cake_dev', 'You must define a regular expression for %s', 'Validation::custom()');

			return false;

		}

		return self::_check($check, $regex);

	}

/**

 * Date validation, determines if the string passed is a valid date.

 * keys that expect full month, day and year will validate leap years.

 *

 * Years are valid from 1800 to 2999.

 *

 * ### Formats:

 *

 * - `dmy` 27-12-2006 or 27-12-06 separators can be a space, period, dash, forward slash

 * - `mdy` 12-27-2006 or 12-27-06 separators can be a space, period, dash, forward slash

 * - `ymd` 2006-12-27 or 06-12-27 separators can be a space, period, dash, forward slash

 * - `dMy` 27 December 2006 or 27 Dec 2006

 * - `Mdy` December 27, 2006 or Dec 27, 2006 comma is optional

 * - `My` December 2006 or Dec 2006

 * - `my` 12/2006 or 12/06 separators can be a space, period, dash, forward slash

 * - `ym` 2006/12 or 06/12 separators can be a space, period, dash, forward slash

 * - `y` 2006 just the year without any separators

 *

 * @param string $check a valid date string

 * @param string|array $format Use a string or an array of the keys above.

 *    Arrays should be passed as array('dmy', 'mdy', etc)

 * @param string $regex If a custom regular expression is used this is the only validation that will occur.

 * @return bool Success

 */

	public static function date($check, $format = 'ymd', $regex = null) {

		if ($regex !== null) {

			return self::_check($check, $regex);

		}

		$month = '(0[123456789]|10|11|12)';

		$separator = '([- /.])';

		$fourDigitYear = '(([1][8-9][0-9][0-9])|([2][0-9][0-9][0-9]))';

		$twoDigitYear = '([0-9]{2})';

		$year = '(?:' . $fourDigitYear . '|' . $twoDigitYear . ')';

		$regex['dmy'] = '%^(?:(?:31(\\/|-|\\.|\\x20)(?:0?[13578]|1[02]))\\1|(?:(?:29|30)' .

			$separator . '(?:0?[1,3-9]|1[0-2])\\2))(?:(?:1[6-9]|[2-9]\\d)?\\d{2})$|^(?:29' .

			$separator . '0?2\\3(?:(?:(?:1[6-9]|[2-9]\\d)?(?:0[48]|[2468][048]|[13579][26])|(?:(?:16|[2468][048]|[3579][26])00))))$|^(?:0?[1-9]|1\\d|2[0-8])' .

			$separator . '(?:(?:0?[1-9])|(?:1[0-2]))\\4(?:(?:1[6-9]|[2-9]\\d)?\\d{2})$%';

		$regex['mdy'] = '%^(?:(?:(?:0?[13578]|1[02])(\\/|-|\\.|\\x20)31)\\1|(?:(?:0?[13-9]|1[0-2])' .

			$separator . '(?:29|30)\\2))(?:(?:1[6-9]|[2-9]\\d)?\\d{2})$|^(?:0?2' . $separator . '29\\3(?:(?:(?:1[6-9]|[2-9]\\d)?(?:0[48]|[2468][048]|[13579][26])|(?:(?:16|[2468][048]|[3579][26])00))))$|^(?:(?:0?[1-9])|(?:1[0-2]))' .

			$separator . '(?:0?[1-9]|1\\d|2[0-8])\\4(?:(?:1[6-9]|[2-9]\\d)?\\d{2})$%';

		$regex['ymd'] = '%^(?:(?:(?:(?:(?:1[6-9]|[2-9]\\d)?(?:0[48]|[2468][048]|[13579][26])|(?:(?:16|[2468][048]|[3579][26])00)))' .

			$separator . '(?:0?2\\1(?:29)))|(?:(?:(?:1[6-9]|[2-9]\\d)?\\d{2})' .

			$separator . '(?:(?:(?:0?[13578]|1[02])\\2(?:31))|(?:(?:0?[1,3-9]|1[0-2])\\2(29|30))|(?:(?:0?[1-9])|(?:1[0-2]))\\2(?:0?[1-9]|1\\d|2[0-8]))))$%';

		$regex['dMy'] = '/^((31(?!\\ (Feb(ruary)?|Apr(il)?|June?|(Sep(?=\\b|t)t?|Nov)(ember)?)))|((30|29)(?!\\ Feb(ruary)?))|(29(?=\\ Feb(ruary)?\\ (((1[6-9]|[2-9]\\d)(0[48]|[2468][048]|[13579][26])|((16|[2468][048]|[3579][26])00)))))|(0?[1-9])|1\\d|2[0-8])\\ (Jan(uary)?|Feb(ruary)?|Ma(r(ch)?|y)|Apr(il)?|Ju((ly?)|(ne?))|Aug(ust)?|Oct(ober)?|(Sep(?=\\b|t)t?|Nov|Dec)(ember)?)\\ ((1[6-9]|[2-9]\\d)\\d{2})$/';

		$regex['Mdy'] = '/^(?:(((Jan(uary)?|Ma(r(ch)?|y)|Jul(y)?|Aug(ust)?|Oct(ober)?|Dec(ember)?)\\ 31)|((Jan(uary)?|Ma(r(ch)?|y)|Apr(il)?|Ju((ly?)|(ne?))|Aug(ust)?|Oct(ober)?|(Sep)(tember)?|(Nov|Dec)(ember)?)\\ (0?[1-9]|([12]\\d)|30))|(Feb(ruary)?\\ (0?[1-9]|1\\d|2[0-8]|(29(?=,?\\ ((1[6-9]|[2-9]\\d)(0[48]|[2468][048]|[13579][26])|((16|[2468][048]|[3579][26])00)))))))\\,?\\ ((1[6-9]|[2-9]\\d)\\d{2}))$/';

		$regex['My'] = '%^(Jan(uary)?|Feb(ruary)?|Ma(r(ch)?|y)|Apr(il)?|Ju((ly?)|(ne?))|Aug(ust)?|Oct(ober)?|(Sep(?=\\b|t)t?|Nov|Dec)(ember)?)' .

			$separator . '((1[6-9]|[2-9]\\d)\\d{2})$%';

		$regex['my'] = '%^(' . $month . $separator . $year . ')$%';

		$regex['ym'] = '%^(' . $year . $separator . $month . ')$%';

		$regex['y'] = '%^(' . $fourDigitYear . ')$%';

		$format = (is_array($format)) ? array_values($format) : array($format);

		foreach ($format as $key) {

			if (self::_check($check, $regex[$key]) === true) {

				return true;

			}

		}

		return false;

	}

/**

 * Validates a datetime value

 *

 * All values matching the "date" core validation rule, and the "time" one will be valid

 *

 * @param string $check Value to check

 * @param string|array $dateFormat Format of the date part. See Validation::date for more information.

 * @param string $regex Regex for the date part. If a custom regular expression is used this is the only validation that will occur.

 * @return bool True if the value is valid, false otherwise

 * @see Validation::date

 * @see Validation::time

 */

	public static function datetime($check, $dateFormat = 'ymd', $regex = null) {

		$valid = false;

		$parts = explode(' ', $check);

		if (!empty($parts) && count($parts) > 1) {

			$time = array_pop($parts);

			$date = implode(' ', $parts);

			$valid = self::date($date, $dateFormat, $regex) && self::time($time);

		}

		return $valid;

	}

/**

 * Time validation, determines if the string passed is a valid time.

 * Validates time as 24hr (HH:MM) or am/pm ([H]H:MM[a|p]m)

 * Does not allow/validate seconds.

 *

 * @param string $check a valid time string

 * @return bool Success

 */

	public static function time($check) {

		return self::_check($check, '%^((0?[1-9]|1[012])(:[0-5]\d){0,2} ?([AP]M|[ap]m))$|^([01]\d|2[0-3])(:[0-5]\d){0,2}$%');

	}

/**

 * Boolean validation, determines if value passed is a boolean integer or true/false.

 *

 * @param string $check a valid boolean

 * @return bool Success

 */

	public static function boolean($check) {

		$booleanList = array(0, 1, '0', '1', true, false);

		return in_array($check, $booleanList, true);

	}

/**

 * Checks that a value is a valid decimal. Both the sign and exponent are optional.

 *

 * Valid Places:

 *

 * - null => Any number of decimal places, including none. The '.' is not required.

 * - true => Any number of decimal places greater than 0, or a float|double. The '.' is required.

 * - 1..N => Exactly that many number of decimal places. The '.' is required.

 *

 * @param float $check The value the test for decimal.

 * @param int $places Decimal places.

 * @param string $regex If a custom regular expression is used, this is the only validation that will occur.

 * @return bool Success

 */

	public static function decimal($check, $places = null, $regex = null) {

		if ($regex === null) {

			$lnum = '[0-9]+';

			$dnum = "[0-9]*[\.]{$lnum}";

			$sign = '[+-]?';

			$exp = "(?:[eE]{$sign}{$lnum})?";

			if ($places === null) {

				$regex = "/^{$sign}(?:{$lnum}|{$dnum}){$exp}$/";

			} elseif ($places === true) {

				if (is_float($check) && floor($check) === $check) {

					$check = sprintf("%.1f", $check);

				}

				$regex = "/^{$sign}{$dnum}{$exp}$/";

			} elseif (is_numeric($places)) {

				$places = '[0-9]{' . $places . '}';

				$dnum = "(?:[0-9]*[\.]{$places}|{$lnum}[\.]{$places})";

				$regex = "/^{$sign}{$dnum}{$exp}$/";

			}

		}

		// account for localized floats.

		$data = localeconv();

		$check = str_replace($data['thousands_sep'], '', $check);

		$check = str_replace($data['decimal_point'], '.', $check);

		return self::_check($check, $regex);

	}

/**

 * Validates for an email address.

 *

 * Only uses getmxrr() checking for deep validation if PHP 5.3.0+ is used, or

 * any PHP version on a non-windows distribution

 *

 * @param string $check Value to check

 * @param bool $deep Perform a deeper validation (if true), by also checking availability of host

 * @param string $regex Regex to use (if none it will use built in regex)

 * @return bool Success

 */

	public static function email($check, $deep = false, $regex = null) {

		if (is_array($check)) {

			extract(self::_defaults($check));

		}

		if ($regex === null) {

			$regex = '/^[\p{L}0-9!#$%&\'*+\/=?^_`{|}~-]+(?:\.[\p{L}0-9!#$%&\'*+\/=?^_`{|}~-]+)*@' . self::$_pattern['hostname'] . '$/ui';

		}

		$return = self::_check($check, $regex);

		if ($deep === false || $deep === null) {

			return $return;

		}

		if ($return === true && preg_match('/@(' . self::$_pattern['hostname'] . ')$/i', $check, $regs)) {

			if (function_exists('getmxrr') && getmxrr($regs[1], $mxhosts)) {

				return true;

			}

			if (function_exists('checkdnsrr') && checkdnsrr($regs[1], 'MX')) {

				return true;

			}

			return is_array(gethostbynamel($regs[1]));

		}

		return false;

	}

/**

 * Check that value is exactly $comparedTo.

 *

 * @param mixed $check Value to check

 * @param mixed $comparedTo Value to compare

 * @return bool Success

 */

	public static function equalTo($check, $comparedTo) {

		return ($check === $comparedTo);

	}

/**

 * Check that value has a valid file extension.

 *

 * @param string|array $check Value to check

 * @param array $extensions file extensions to allow. By default extensions are 'gif', 'jpeg', 'png', 'jpg'

 * @return bool Success

 */

	public static function extension($check, $extensions = array('gif', 'jpeg', 'png', 'jpg')) {

		if (is_array($check)) {

			return self::extension(array_shift($check), $extensions);

		}

		$extension = strtolower(pathinfo($check, PATHINFO_EXTENSION));

		foreach ($extensions as $value) {

			if ($extension === strtolower($value)) {

				return true;

			}

		}

		return false;

	}

/**

 * Validation of an IP address.

 *

 * @param string $check The string to test.

 * @param string $type The IP Protocol version to validate against

 * @return bool Success

 */

	public static function ip($check, $type = 'both') {

		$type = strtolower($type);

		$flags = 0;

		if ($type === 'ipv4') {

			$flags = FILTER_FLAG_IPV4;

		}

		if ($type === 'ipv6') {

			$flags = FILTER_FLAG_IPV6;

		}

		return (bool)filter_var($check, FILTER_VALIDATE_IP, array('flags' => $flags));

	}

/**

 * Checks whether the length of a string is greater or equal to a minimal length.

 *

 * @param string $check The string to test

 * @param int $min The minimal string length

 * @return bool Success

 */

	public static function minLength($check, $min) {

		return mb_strlen($check) >= $min;

	}

/**

 * Checks whether the length of a string is smaller or equal to a maximal length..

 *

 * @param string $check The string to test

 * @param int $max The maximal string length

 * @return bool Success

 */

	public static function maxLength($check, $max) {

		return mb_strlen($check) <= $max;

	}

/**

 * Checks that a value is a monetary amount.

 *

 * @param string $check Value to check

 * @param string $symbolPosition Where symbol is located (left/right)

 * @return bool Success

 */

	public static function money($check, $symbolPosition = 'left') {

		$money = '(?!0,?\d)(?:\d{1,3}(?:([, .])\d{3})?(?:\1\d{3})*|(?:\d+))((?!\1)[,.]\d{1,2})?';

		if ($symbolPosition === 'right') {

			$regex = '/^' . $money . '(?<!\x{00a2})\p{Sc}?$/u';

		} else {

			$regex = '/^(?!\x{00a2})\p{Sc}?' . $money . '$/u';

		}

		return self::_check($check, $regex);

	}

/**

 * Validate a multiple select. Comparison is case sensitive by default.

 *

 * Valid Options

 *

 * - in => provide a list of choices that selections must be made from

 * - max => maximum number of non-zero choices that can be made

 * - min => minimum number of non-zero choices that can be made

 *

 * @param array $check Value to check

 * @param array $options Options for the check.

 * @param bool $caseInsensitive Set to true for case insensitive comparison.

 * @return bool Success

 */

	public static function multiple($check, $options = array(), $caseInsensitive = false) {

		$defaults = array('in' => null, 'max' => null, 'min' => null);

		$options += $defaults;

		$check = array_filter((array)$check);

		if (empty($check)) {

			return false;

		}

		if ($options['max'] && count($check) > $options['max']) {

			return false;

		}

		if ($options['min'] && count($check) < $options['min']) {

			return false;

		}

		if ($options['in'] && is_array($options['in'])) {

			if ($caseInsensitive) {

				$options['in'] = array_map('mb_strtolower', $options['in']);

			}

			foreach ($check as $val) {

				$strict = !is_numeric($val);

				if ($caseInsensitive) {

					$val = mb_strtolower($val);

				}

				if (!in_array((string)$val, $options['in'], $strict)) {

					return false;

				}

			}

		}

		return true;

	}

/**

 * Checks if a value is numeric.

 *

 * @param string $check Value to check

 * @return bool Success

 */

	public static function numeric($check) {

		return is_numeric($check);

	}

/**

 * Checks if a value is a natural number.

 *

 * @param string $check Value to check

 * @param bool $allowZero Set true to allow zero, defaults to false

 * @return bool Success

 * @see http://en.wikipedia.org/wiki/Natural_number

 */

	public static function naturalNumber($check, $allowZero = false) {

		$regex = $allowZero ? '/^(?:0|[1-9][0-9]*)$/' : '/^[1-9][0-9]*$/';

		return self::_check($check, $regex);

	}

/**

 * Check that a value is a valid phone number.

 *

 * @param string|array $check Value to check (string or array)

 * @param string $regex Regular expression to use

 * @param string $country Country code (defaults to 'all')

 * @return bool Success

 */

	public static function phone($check, $regex = null, $country = 'all') {

		if (is_array($check)) {

			extract(self::_defaults($check));

		}

		if ($regex === null) {

			switch ($country) {

				case 'us':

				case 'ca':

				case 'can': // deprecated three-letter-code

				case 'all':

					// includes all NANPA members.

					// see http://en.wikipedia.org/wiki/North_American_Numbering_Plan#List_of_NANPA_countries_and_territories

					$regex = '/^(?:(?:\+?1\s*(?:[.-]\s*)?)?';

					// Area code 555, X11 is not allowed.

					$areaCode = '(?![2-9]11)(?!555)([2-9][0-8][0-9])';

					$regex .= '(?:\(\s*' . $areaCode . '\s*\)|' . $areaCode . ')';

					$regex .= '\s*(?:[.-]\s*)?)';

					// Exchange and 555-XXXX numbers

					$regex .= '(?!(555(?:\s*(?:[.\-\s]\s*))(01([0-9][0-9])|1212)))';

					$regex .= '(?!(555(01([0-9][0-9])|1212)))';

					$regex .= '([2-9]1[02-9]|[2-9]1[02-9]|[2-9][02-9]1|[2-9][02-9]{2})\s*(?:[.-]\s*)';

					// Local number and extension

					$regex .= '?([0-9]{4})';

					$regex .= '(?:\s*(?:#|x\.?|ext\.?|extension)\s*(\d+))?$/';

				break;

			}

		}

		if (empty($regex)) {

			return self::_pass('phone', $check, $country);

		}

		return self::_check($check, $regex);

	}

/**

 * Checks that a given value is a valid postal code.

 *

 * @param string|array $check Value to check

 * @param string $regex Regular expression to use

 * @param string $country Country to use for formatting

 * @return bool Success

 */

	public static function postal($check, $regex = null, $country = 'us') {

		if (is_array($check)) {

			extract(self::_defaults($check));

		}

		if ($regex === null) {

			switch ($country) {

				case 'uk':

					$regex = '/\\A\\b[A-Z]{1,2}[0-9][A-Z0-9]? [0-9][ABD-HJLNP-UW-Z]{2}\\b\\z/i';

					break;

				case 'ca':

					$district = '[ABCEGHJKLMNPRSTVYX]';

					$letters = '[ABCEGHJKLMNPRSTVWXYZ]';

					$regex = "/\\A\\b{$district}[0-9]{$letters} [0-9]{$letters}[0-9]\\b\\z/i";

					break;

				case 'it':

				case 'de':

					$regex = '/^[0-9]{5}$/i';

					break;

				case 'be':

					$regex = '/^[1-9]{1}[0-9]{3}$/i';

					break;

				case 'us':

					$regex = '/\\A\\b[0-9]{5}(?:-[0-9]{4})?\\b\\z/i';

					break;

			}

		}

		if (empty($regex)) {

			return self::_pass('postal', $check, $country);

		}

		return self::_check($check, $regex);

	}

/**

 * Validate that a number is in specified range.

 * if $lower and $upper are not set, will return true if

 * $check is a legal finite on this platform

 *

 * @param string $check Value to check

 * @param int|float $lower Lower limit

 * @param int|float $upper Upper limit

 * @return bool Success

 */

	public static function range($check, $lower = null, $upper = null) {

		if (!is_numeric($check)) {

			return false;

		}

		if (isset($lower) && isset($upper)) {

			return ($check > $lower && $check < $upper);

		}

		return is_finite($check);

	}

/**

 * Checks that a value is a valid Social Security Number.

 *

 * @param string|array $check Value to check

 * @param string $regex Regular expression to use

 * @param string $country Country

 * @return bool Success

 * @deprecated Deprecated 2.6. Will be removed in 3.0.

 */

	public static function ssn($check, $regex = null, $country = null) {

		if (is_array($check)) {

			extract(self::_defaults($check));

		}

		if ($regex === null) {

			switch ($country) {

				case 'dk':

					$regex = '/\\A\\b[0-9]{6}-[0-9]{4}\\b\\z/i';

					break;

				case 'nl':

					$regex = '/\\A\\b[0-9]{9}\\b\\z/i';

					break;

				case 'us':

					$regex = '/\\A\\b[0-9]{3}-[0-9]{2}-[0-9]{4}\\b\\z/i';

					break;

			}

		}

		if (empty($regex)) {

			return self::_pass('ssn', $check, $country);

		}

		return self::_check($check, $regex);

	}

/**

 * Checks that a value is a valid URL according to http://www.w3.org/Addressing/URL/url-spec.txt

 *

 * The regex checks for the following component parts:

 *

 * - a valid, optional, scheme

 * - a valid ip address OR

 *   a valid domain name as defined by section 2.3.1 of http://www.ietf.org/rfc/rfc1035.txt

 *   with an optional port number

 * - an optional valid path

 * - an optional query string (get parameters)

 * - an optional fragment (anchor tag)

 *

 * @param string $check Value to check

 * @param bool $strict Require URL to be prefixed by a valid scheme (one of http(s)/ftp(s)/file/news/gopher)

 * @return bool Success

 */

	public static function url($check, $strict = false) {

		self::_populateIp();

		$validChars = '([' . preg_quote('!"$&\'()*+,-.@_:;=~[]') . '\/0-9\p{L}\p{N}]|(%[0-9a-f]{2}))';

		$regex = '/^(?:(?:https?|ftps?|sftp|file|news|gopher):\/\/)' . (!empty($strict) ? '' : '?') .

			'(?:' . self::$_pattern['IPv4'] . '|\[' . self::$_pattern['IPv6'] . '\]|' . self::$_pattern['hostname'] . ')(?::[1-9][0-9]{0,4})?' .

			'(?:\/?|\/' . $validChars . '*)?' .

			'(?:\?' . $validChars . '*)?' .

			'(?:#' . $validChars . '*)?$/iu';

		return self::_check($check, $regex);

	}

/**

 * Checks if a value is in a given list. Comparison is case sensitive by default.

 *

 * @param string $check Value to check.

 * @param array $list List to check against.

 * @param bool $caseInsensitive Set to true for case insensitive comparison.

 * @return bool Success.

 */

	public static function inList($check, $list, $caseInsensitive = false) {

		if ($caseInsensitive) {

			$list = array_map('mb_strtolower', $list);

			$check = mb_strtolower($check);

		} else {

			$list = array_map('strval', $list);

		}

		return in_array((string)$check, $list, true);

	}

/**

 * Runs an user-defined validation.

 *

 * @param string|array $check value that will be validated in user-defined methods.

 * @param object $object class that holds validation method

 * @param string $method class method name for validation to run

 * @param array $args arguments to send to method

 * @return mixed user-defined class class method returns

 */

	public static function userDefined($check, $object, $method, $args = null) {

		return call_user_func_array(array($object, $method), array($check, $args));

	}

/**

 * Checks that a value is a valid UUID - http://tools.ietf.org/html/rfc4122

 *

 * @param string $check Value to check

 * @return bool Success

 */

	public static function uuid($check) {

		$regex = '/^[a-fA-F0-9]{8}-[a-fA-F0-9]{4}-[0-5][a-fA-F0-9]{3}-[089aAbB][a-fA-F0-9]{3}-[a-fA-F0-9]{12}$/';

		return self::_check($check, $regex);

	}

/**

 * Attempts to pass unhandled Validation locales to a class starting with $classPrefix

 * and ending with Validation. For example $classPrefix = 'nl', the class would be

 * `NlValidation`.

 *

 * @param string $method The method to call on the other class.

 * @param mixed $check The value to check or an array of parameters for the method to be called.

 * @param string $classPrefix The prefix for the class to do the validation.

 * @return mixed Return of Passed method, false on failure

 */

	protected static function _pass($method, $check, $classPrefix) {

		$className = ucwords($classPrefix) . 'Validation';

		if (!class_exists($className)) {

			trigger_error(__d('cake_dev', 'Could not find %s class, unable to complete validation.', $className), E_USER_WARNING);

			return false;

		}

		if (!method_exists($className, $method)) {

			trigger_error(__d('cake_dev', 'Method %s does not exist on %s unable to complete validation.', $method, $className), E_USER_WARNING);

			return false;

		}

		$check = (array)$check;

		return call_user_func_array(array($className, $method), $check);

	}

/**

 * Runs a regular expression match.

 *

 * @param string $check Value to check against the $regex expression

 * @param string $regex Regular expression

 * @return bool Success of match

 */

	protected static function _check($check, $regex) {

		if (is_string($regex) && preg_match($regex, $check)) {

			return true;

		}

		return false;

	}

/**

 * Get the values to use when value sent to validation method is

 * an array.

 *

 * @param array $params Parameters sent to validation method

 * @return void

 */

	protected static function _defaults($params) {

		self::_reset();

		$defaults = array(

			'check' => null,

			'regex' => null,

			'country' => null,

			'deep' => false,

			'type' => null

		);

		$params += $defaults;

		if ($params['country'] !== null) {

			$params['country'] = mb_strtolower($params['country']);

		}

		return $params;

	}

/**

 * Luhn algorithm

 *

 * @param string|array $check Value to check.

 * @param bool $deep If true performs deep check.

 * @return bool Success

 * @see http://en.wikipedia.org/wiki/Luhn_algorithm

 */

	public static function luhn($check, $deep = false) {

		if (is_array($check)) {

			extract(self::_defaults($check));

		}

		if ($deep !== true) {

			return true;

		}

		if ((int)$check === 0) {

			return false;

		}

		$sum = 0;

		$length = strlen($check);

		for ($position = 1 - ($length % 2); $position < $length; $position += 2) {

			$sum += $check[$position];

		}

		for ($position = ($length % 2); $position < $length; $position += 2) {

			$number = $check[$position] * 2;

			$sum += ($number < 10) ? $number : $number - 9;

		}

		return ($sum % 10 === 0);

	}

/**

 * Checks the mime type of a file.

 *

 * @param string|array $check Value to check.

 * @param array|string $mimeTypes Array of mime types or regex pattern to check.

 * @return bool Success

 * @throws CakeException when mime type can not be determined.

 */

	public static function mimeType($check, $mimeTypes = array()) {

		if (is_array($check) && isset($check['tmp_name'])) {

			$check = $check['tmp_name'];

		}

		$File = new File($check);

		$mime = $File->mime();

		if ($mime === false) {

			throw new CakeException(__d('cake_dev', 'Can not determine the mimetype.'));

		}

		if (is_string($mimeTypes)) {

			return self::_check($mime, $mimeTypes);

		}

		foreach ($mimeTypes as $key => $val) {

			$mimeTypes[$key] = strtolower($val);

		}

		return in_array($mime, $mimeTypes);

	}

/**

 * Checks the filesize

 *

 * @param string|array $check Value to check.

 * @param string $operator See `Validation::comparison()`.

 * @param int|string $size Size in bytes or human readable string like '5MB'.

 * @return bool Success

 */

	public static function fileSize($check, $operator = null, $size = null) {

		if (is_array($check) && isset($check['tmp_name'])) {

			$check = $check['tmp_name'];

		}

		if (is_string($size)) {

			$size = CakeNumber::fromReadableSize($size);

		}

		$filesize = filesize($check);

		return self::comparison($filesize, $operator, $size);

	}