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<?php
/**
* Zend Framework
*
* LICENSE
*
* This source file is subject to the new BSD license that is bundled
* with this package in the file LICENSE.txt.
* It is also available through the world-wide-web at this URL:
* http://framework.zend.com/license/new-bsd
* If you did not receive a copy of the license and are unable to
* obtain it through the world-wide-web, please send an email
* to license@zend.com so we can send you a copy immediately.
*
* @category Zend
* @package Zend_Filter
* @copyright Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
* @version $Id$
*/
/**
* @see Zend_Filter_Interface
*/
/**
* @category Zend
* @package Zend_Filter
* @copyright Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
class Zend_Filter_Null implements Zend_Filter_Interface
{
const BOOLEAN = 1;
const INTEGER = 2;
const EMPTY_ARRAY = 4;
const STRING = 8;
const ZERO = 16;
const ALL = 31;
protected $_constants = array(
self::BOOLEAN => 'boolean',
self::INTEGER => 'integer',
self::EMPTY_ARRAY => 'array',
self::STRING => 'string',
self::ZERO => 'zero',
self::ALL => 'all'
);
/**
* Internal type to detect
*
* @var integer
*/
protected $_type = self::ALL;
/**
* Constructor
*
* @param string|array|Zend_Config $options OPTIONAL
*/
public function __construct($options = null)
{
if ($options instanceof Zend_Config) {
$options = $options->toArray();
} else if (!is_array($options)) {
$options = func_get_args();
$temp = array();
if (!empty($options)) {
$temp = array_shift($options);
}
$options = $temp;
} else if (is_array($options) && array_key_exists('type', $options)) {
$options = $options['type'];
}
if (!empty($options)) {
$this->setType($options);
}
}
/**
* Returns the set null types
*
* @return array
*/
public function getType()
{
return $this->_type;
}
/**
* Set the null types
*
* @param integer|array $type
* @throws Zend_Filter_Exception
* @return Zend_Filter_Null
*/
public function setType($type = null)
{
if (is_array($type)) {
$detected = 0;
foreach($type as $value) {
if (is_int($value)) {
$detected += $value;
} else if (in_array($value, $this->_constants)) {
$detected += array_search($value, $this->_constants);
}
}
$type = $detected;
} else if (is_string($type)) {
if (in_array($type, $this->_constants)) {
$type = array_search($type, $this->_constants);
}
}
if (!is_int($type) || ($type < 0) || ($type > self::ALL)) {
throw new Zend_Filter_Exception('Unknown type');
}
$this->_type = $type;
return $this;
}
/**
* Defined by Zend_Filter_Interface
*
* Returns null representation of $value, if value is empty and matches
* types that should be considered null.
*
* @param string $value
* @return string
*/
public function filter($value)
{
$type = $this->getType();
// STRING ZERO ('0')
if ($type >= self::ZERO) {
$type -= self::ZERO;
if (is_string($value) && ($value == '0')) {
return null;
}
}
// STRING ('')
if ($type >= self::STRING) {
$type -= self::STRING;
if (is_string($value) && ($value == '')) {
return null;
}
}
// EMPTY_ARRAY (array())
if ($type >= self::EMPTY_ARRAY) {
$type -= self::EMPTY_ARRAY;
if (is_array($value) && ($value == array())) {
return null;
}
}
// INTEGER (0)
if ($type >= self::INTEGER) {
$type -= self::INTEGER;
if (is_int($value) && ($value == 0)) {
return null;
}
}
// BOOLEAN (false)
if ($type >= self::BOOLEAN) {
$type -= self::BOOLEAN;
if (is_bool($value) && ($value == false)) {
return null;
}
}
return $value;
}
}
|
